// Copyright 2007, Google Inc.
// All rights reserved.
//
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//
// * Redistributions of source code must retain the above copyright
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// in the documentation and/or other materials provided with the
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// contributors may be used to endorse or promote products derived from
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//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Google Mock - a framework for writing C++ mock classes.
//
// This file implements some commonly used argument matchers. More
// matchers can be defined by the user implementing the
// MatcherInterface<T> interface if necessary.
// GOOGLETEST_CM0002 DO NOT DELETE
#ifndef GMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
#define GMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
#include <math.h>
#include <algorithm>
#include <iterator>
#include <limits>
#include <ostream> // NOLINT
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "gtest/gtest.h"
#include "gmock/internal/gmock-internal-utils.h"
#include "gmock/internal/gmock-port.h"
#if GTEST_HAS_STD_INITIALIZER_LIST_
# include <initializer_list> // NOLINT -- must be after gtest.h
#endif
GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
/* class A needs to have dll-interface to be used by clients of class B */)
namespace testing {
// To implement a matcher Foo for type T, define:
// 1. a class FooMatcherImpl that implements the
// MatcherInterface<T> interface, and
// 2. a factory function that creates a Matcher<T> object from a
// FooMatcherImpl*.
//
// The two-level delegation design makes it possible to allow a user
// to write "v" instead of "Eq(v)" where a Matcher is expected, which
// is impossible if we pass matchers by pointers. It also eases
// ownership management as Matcher objects can now be copied like
// plain values.
// MatchResultListener is an abstract class. Its << operator can be
// used by a matcher to explain why a value matches or doesn't match.
//
// FIXME: add method
// bool InterestedInWhy(bool result) const;
// to indicate whether the listener is interested in why the match
// result is 'result'.
class MatchResultListener {
public:
// Creates a listener object with the given underlying ostream. The
// listener does not own the ostream, and does not dereference it
// in the constructor or destructor.
explicit MatchResultListener(::std::ostream* os) : stream_(os) {}
virtual ~MatchResultListener() = 0; // Makes this class abstract.
// Streams x to the underlying ostream; does nothing if the ostream
// is NULL.
template <typename T>
MatchResultListener& operator<<(const T& x) {
if (stream_ != NULL)
*stream_ << x;
return *this;
}
// Returns the underlying ostream.
::std::ostream* stream() { return stream_; }
// Returns true iff the listener is interested in an explanation of
// the match result. A matcher's MatchAndExplain() method can use
// this information to avoid generating the explanation when no one
// intends to hear it.
bool IsInterested() const { return stream_ != NULL; }
private:
::std::ostream* const stream_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(MatchResultListener);
};
inline MatchResultListener::~MatchResultListener() {
}
// An instance of a subclass of this knows how to describe itself as a
// matcher.
class MatcherDescriberInterface {
public:
virtual ~MatcherDescriberInterface() {}
// Describes this matcher to an ostream. The function should print
// a verb phrase that describes the property a value matching this
// matcher should have. The subject of the verb phrase is the value
// being matched. For example, the DescribeTo() method of the Gt(7)
// matcher prints "is greater than 7".
virtual void DescribeTo(::std::ostream* os) const = 0;
// Describes the negation of this matcher to an ostream. For
// example, if the description of this matcher is "is greater than
// 7", the negated description could be "is not greater than 7".
// You are not required to override this when implementing
// MatcherInterface, but it is highly advised so that your matcher
// can produce good error messages.
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "not (";
DescribeTo(os);
*os << ")";
}
};
// The implementation of a matcher.
template <typename T>
class MatcherInterface : public MatcherDescriberInterface {
public:
// Returns true iff the matcher matches x; also explains the match
// result to 'listener' if necessary (see the next paragraph), in
// the form of a non-restrictive relative clause ("which ...",
// "whose ...", etc) that describes x. For example, the
// MatchAndExplain() method of the Pointee(...) matcher should
// generate an explanation like "which points to ...".
//
// Implementations of MatchAndExplain() should add an explanation of
// the match result *if and only if* they can provide additional
// information that's not already present (or not obvious) in the
// print-out of x and the matcher's description. Whether the match
// succeeds is not a factor in deciding whether an explanation is
// needed, as sometimes the caller needs to print a failure message
// when the match succeeds (e.g. when the matcher is used inside
// Not()).
//
// For example, a "has at least 10 elements" matcher should explain
// what the actual element count is, regardless of the match result,
// as it is useful information to the reader; on the other hand, an
// "is empty" matcher probably only needs to explain what the actual
// size is when the match fails, as it's redundant to say that the
// size is 0 when the value is already known to be empty.
//
// You should override this method when defining a new matcher.
//
// It's the responsibility of the caller (Google Mock) to guarantee
// that 'listener' is not NULL. This helps to simplify a matcher's
// implementation when it doesn't care about the performance, as it
// can talk to 'listener' without checking its validity first.
// However, in order to implement dummy listeners efficiently,
// listener->stream() may be NULL.
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
// Inherits these methods from MatcherDescriberInterface:
// virtual void DescribeTo(::std::ostream* os) const = 0;
// virtual void DescribeNegationTo(::std::ostream* os) const;
};
namespace internal {
// Converts a MatcherInterface<T> to a MatcherInterface<const T&>.
template <typename T>
class MatcherInterfaceAdapter : public MatcherInterface<const T&> {
public:
explicit MatcherInterfaceAdapter(const MatcherInterface<T>* impl)
: impl_(impl) {}
virtual ~MatcherInterfaceAdapter() { delete impl_; }
virtual void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
virtual void DescribeNegationTo(::std::ostream* os) const {
impl_->DescribeNegationTo(os);
}
virtual bool MatchAndExplain(const T& x,
MatchResultListener* listener) const {
return impl_->MatchAndExplain(x, listener);
}
private:
const MatcherInterface<T>* const impl_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(MatcherInterfaceAdapter);
};
} // namespace internal
// A match result listener that stores the explanation in a string.
class StringMatchResultListener : public MatchResultListener {
public:
StringMatchResultListener() : MatchResultListener(&ss_) {}
// Returns the explanation accumulated so far.
std::string str() const { return ss_.str(); }
// Clears the explanation accumulated so far.
void Clear() { ss_.str(""); }
private:
::std::stringstream ss_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(StringMatchResultListener);
};
namespace internal {
struct AnyEq {
template <typename A, typename B>
bool operator()(const A& a, const B& b) const { return a == b; }
};
struct AnyNe {
template <typename A, typename B>
bool operator()(const A& a, const B& b) const { return a != b; }
};
struct AnyLt {
template <typename A, typename B>
bool operator()(const A& a, const B& b) const { return a < b; }
};
struct AnyGt {
template <typename A, typename B>
bool operator()(const A& a, const B& b) const { return a > b; }
};
struct AnyLe {
template <typename A, typename B>
bool operator()(const A& a, const B& b) const { return a <= b; }
};
struct AnyGe {
template <typename A, typename B>
bool operator()(const A& a, const B& b) const { return a >= b; }
};
// A match result listener that ignores the explanation.
class DummyMatchResultListener : public MatchResultListener {
public:
DummyMatchResultListener() : MatchResultListener(NULL) {}
private:
GTEST_DISALLOW_COPY_AND_ASSIGN_(DummyMatchResultListener);
};
// A match result listener that forwards the explanation to a given
// ostream. The difference between this and MatchResultListener is
// that the former is concrete.
class StreamMatchResultListener : public MatchResultListener {
public:
explicit StreamMatchResultListener(::std::ostream* os)
: MatchResultListener(os) {}
private:
GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamMatchResultListener);
};
// An internal class for implementing Matcher<T>, which will derive
// from it. We put functionalities common to all Matcher<T>
// specializations here to avoid code duplication.
template <typename T>
class MatcherBase {
public:
// Returns true iff the matcher matches x; also explains the match
// result to 'listener'.
bool MatchAndExplain(GTEST_REFERENCE_TO_CONST_(T) x,
MatchResultListener* listener) const {
return impl_->MatchAndExplain(x, listener);
}
// Returns true iff this matcher matches x.
bool Matches(GTEST_REFERENCE_TO_CONST_(T) x) const {
DummyMatchResultListener dummy;
return MatchAndExplain(x, &dummy);
}
// Describes this matcher to an ostream.
void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
// Describes the negation of this matcher to an ostream.
void DescribeNegationTo(::std::ostream* os) const {
impl_->DescribeNegationTo(os);
}
// Explains why x matches, or doesn't match, the matcher.
void ExplainMatchResultTo(GTEST_REFERENCE_TO_CONST_(T) x,
::std::ostream* os) const {
StreamMatchResultListener listener(os);
MatchAndExplain(x, &listener);
}
// Returns the describer for this matcher object; retains ownership
// of the describer, which is only guaranteed to be alive when
// this matcher object is alive.
const MatcherDescriberInterface* GetDescriber() const {
return impl_.get();
}
protected:
MatcherBase() {}
// Constructs a matcher from its implementation.
explicit MatcherBase(
const MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)>* impl)
: impl_(impl) {}
template <typename U>
explicit MatcherBase(
const MatcherInterface<U>* impl,
typename internal::EnableIf<
!internal::IsSame<U, GTEST_REFERENCE_TO_CONST_(U)>::value>::type* =
NULL)
: impl_(new internal::MatcherInterfaceAdapter<U>(impl)) {}
virtual ~MatcherBase() {}
private:
// shared_ptr (util/gtl/shared_ptr.h) and linked_ptr have similar
// interfaces. The former dynamically allocates a chunk of memory
// to hold the reference count, while the latter tracks all
// references using a circular linked list without allocating
// memory. It has been observed that linked_ptr performs better in
// typical scenarios. However, shared_ptr can out-perform
// linked_ptr when there are many more uses of the copy constructor
// than the default constructor.
//
// If performance becomes a problem, we should see if using
// shared_ptr helps.
::testing::internal::linked_ptr<
const MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)> >
impl_;
};
} // namespace internal
// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
// object that can check whether a value of type T matches. The
// implementation of Matcher<T> is just a linked_ptr to const
// MatcherInterface<T>, so copying is fairly cheap. Don't inherit
// from Matcher!
template <typename T>
class Matcher : public internal::MatcherBase<T> {
public:
// Constructs a null matcher. Needed for storing Matcher objects in STL
// containers. A default-constructed matcher is not yet initialized. You
// cannot use it until a valid value has been assigned to it.
explicit Matcher() {} // NOLINT
// Constructs a matcher from its implementation.
explicit Matcher(const MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)>* impl)
: internal::MatcherBase<T>(impl) {}
template <typename U>
explicit Matcher(const MatcherInterface<U>* impl,
typename internal::EnableIf<!internal::IsSame<
U, GTEST_REFERENCE_TO_CONST_(U)>::value>::type* = NULL)
: internal::MatcherBase<T>(impl) {}
// Implicit constructor here allows people to write
// EXPECT_CALL(foo, Bar(5)) instead of EXPECT_CALL(foo, Bar(Eq(5))) sometimes
Matcher(T value); // NOLINT
};
// The following two specializations allow the user to write str
// instead of Eq(str) and "foo" instead of Eq("foo") when a std::string
// matcher is expected.
template <>
class GTEST_API_ Matcher<const std::string&>
: public internal::MatcherBase<const std::string&> {
public:
Matcher() {}
explicit Matcher(const MatcherInterface<const std::string&>* impl)
: internal::MatcherBase<const std::string&>(impl) {}
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a std::string object.
Matcher(const std::string& s); // NOLINT
#if GTEST_HAS_GLOBAL_STRING
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a ::string object.
Matcher(const ::string& s); // NOLINT
#endif // GTEST_HAS_GLOBAL_STRING
// Allows the user to write "foo" instead of Eq("foo") sometimes.
Matcher(const char* s); // NOLINT
};
template <>
class GTEST_API_ Matcher<std::string>
: public internal::MatcherBase<std::string> {
public:
Matcher() {}
explicit Matcher(const MatcherInterface<const std::string&>* impl)
: internal::MatcherBase<std::string>(impl) {}
explicit Matcher(const MatcherInterface<std::string>* impl)
: internal::MatcherBase<std::string>(impl) {}
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a string object.
Matcher(const std::string& s); // NOLINT
#if GTEST_HAS_GLOBAL_STRING
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a ::string object.
Matcher(const ::string& s); // NOLINT
#endif // GTEST_HAS_GLOBAL_STRING
// Allows the user to write "foo" instead of Eq("foo") sometimes.
Matcher(const char* s); // NOLINT
};
#if GTEST_HAS_GLOBAL_STRING
// The following two specializations allow the user to write str
// instead of Eq(str) and "foo" instead of Eq("foo") when a ::string
// matcher is expected.
template <>
class GTEST_API_ Matcher<const ::string&>
: public internal::MatcherBase<const ::string&> {
public:
Matcher() {}
explicit Matcher(const MatcherInterface<const ::string&>* impl)
: internal::MatcherBase<const ::string&>(impl) {}
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a std::string object.
Matcher(const std::string& s); // NOLINT
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a ::string object.
Matcher(const ::string& s); // NOLINT
// Allows the user to write "foo" instead of Eq("foo") sometimes.
Matcher(const char* s); // NOLINT
};
template <>
class GTEST_API_ Matcher< ::string>
: public internal::MatcherBase< ::string> {
public:
Matcher() {}
explicit Matcher(const MatcherInterface<const ::string&>* impl)
: internal::MatcherBase< ::string>(impl) {}
explicit Matcher(const MatcherInterface< ::string>* impl)
: internal::MatcherBase< ::string>(impl) {}
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a std::string object.
Matcher(const std::string& s); // NOLINT
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a ::string object.
Matcher(const ::string& s); // NOLINT
// Allows the user to write "foo" instead of Eq("foo") sometimes.
Matcher(const char* s); // NOLINT
};
#endif // GTEST_HAS_GLOBAL_STRING
#if GTEST_HAS_ABSL
// The following two specializations allow the user to write str
// instead of Eq(str) and "foo" instead of Eq("foo") when a absl::string_view
// matcher is expected.
template <>
class GTEST_API_ Matcher<const absl::string_view&>
: public internal::MatcherBase<const absl::string_view&> {
public:
Matcher() {}
explicit Matcher(const MatcherInterface<const absl::string_view&>* impl)
: internal::MatcherBase<const absl::string_view&>(impl) {}
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a std::string object.
Matcher(const std::string& s); // NOLINT
#if GTEST_HAS_GLOBAL_STRING
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a ::string object.
Matcher(const ::string& s); // NOLINT
#endif // GTEST_HAS_GLOBAL_STRING
// Allows the user to write "foo" instead of Eq("foo") sometimes.
Matcher(const char* s); // NOLINT
// Allows the user to pass absl::string_views directly.
Matcher(absl::string_view s); // NOLINT
};
template <>
class GTEST_API_ Matcher<absl::string_view>
: public internal::MatcherBase<absl::string_view> {
public:
Matcher() {}
explicit Matcher(const MatcherInterface<const absl::string_view&>* impl)
: internal::MatcherBase<absl::string_view>(impl) {}
explicit Matcher(const MatcherInterface<absl::string_view>* impl)
: internal::MatcherBase<absl::string_view>(impl) {}
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a std::string object.
Matcher(const std::string& s); // NOLINT
#if GTEST_HAS_GLOBAL_STRING
// Allows the user to write str instead of Eq(str) sometimes, where
// str is a ::string object.
Matcher(const ::string& s); // NOLINT
#endif // GTEST_HAS_GLOBAL_STRING
// Allows the user to write "foo" instead of Eq("foo") sometimes.
Matcher(const char* s); // NOLINT
// Allows the user to pass absl::string_views directly.
Matcher(absl::string_view s); // NOLINT
};
#endif // GTEST_HAS_ABSL
// Prints a matcher in a human-readable format.
template <typename T>
std::ostream& operator<<(std::ostream& os, const Matcher<T>& matcher) {
matcher.DescribeTo(&os);
return os;
}
// The PolymorphicMatcher class template makes it easy to implement a
// polymorphic matcher (i.e. a matcher that can match values of more
// than one type, e.g. Eq(n) and NotNull()).
//
// To define a polymorphic matcher, a user should provide an Impl
// class that has a DescribeTo() method and a DescribeNegationTo()
// method, and define a member function (or member function template)
//
// bool MatchAndExplain(const Value& value,
// MatchResultListener* listener) const;
//
// See the definition of NotNull() for a complete example.
template <class Impl>
class PolymorphicMatcher {
public:
explicit PolymorphicMatcher(const Impl& an_impl) : impl_(an_impl) {}
// Returns a mutable reference to the underlying matcher
// implementation object.
Impl& mutable_impl() { return impl_; }
// Returns an immutable reference to the underlying matcher
// implementation object.
const Impl& impl() const { return impl_; }
template <typename T>
operator Matcher<T>() const {
return Matcher<T>(new MonomorphicImpl<GTEST_REFERENCE_TO_CONST_(T)>(impl_));
}
private:
template <typename T>
class MonomorphicImpl : public MatcherInterface<T> {
public:
explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
virtual void DescribeTo(::std::ostream* os) const {
impl_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
impl_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
return impl_.MatchAndExplain(x, listener);
}
private:
const Impl impl_;
GTEST_DISALLOW_ASSIGN_(MonomorphicImpl);
};
Impl impl_;
GTEST_DISALLOW_ASSIGN_(PolymorphicMatcher);
};
// Creates a matcher from its implementation. This is easier to use
// than the Matcher<T> constructor as it doesn't require you to
// explicitly write the template argument, e.g.
//
// MakeMatcher(foo);
// vs
// Matcher<const string&>(foo);
template <typename T>
inline Matcher<T> MakeMatcher(const MatcherInterface<T>* impl) {
return Matcher<T>(impl);
}
// Creates a polymorphic matcher from its implementation. This is
// easier to use than the PolymorphicMatcher<Impl> constructor as it
// doesn't require you to explicitly write the template argument, e.g.
//
// MakePolymorphicMatcher(foo);
// vs
// PolymorphicMatcher<TypeOfFoo>(foo);
template <class Impl>
inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
return PolymorphicMatcher<Impl>(impl);
}
// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
// and MUST NOT BE USED IN USER CODE!!!
namespace internal {
// The MatcherCastImpl class template is a helper for implementing
// MatcherCast(). We need this helper in order to partially
// specialize the implementation of MatcherCast() (C++ allows
// class/struct templates to be partially specialized, but not
// function templates.).
// This general version is used when MatcherCast()'s argument is a
// polymorphic matcher (i.e. something that can be converted to a
// Matcher but is not one yet; for example, Eq(value)) or a value (for
// example, "hello").
template <typename T, typename M>
class MatcherCastImpl {
public:
static Matcher<T> Cast(const M& polymorphic_matcher_or_value) {
// M can be a polymorphic matcher, in which case we want to use
// its conversion operator to create Matcher<T>. Or it can be a value
// that should be passed to the Matcher<T>'s constructor.
//
// We can't call Matcher<T>(polymorphic_matcher_or_value) when M is a
// polymorphic matcher because it'll be ambiguous if T has an implicit
// constructor from M (this usually happens when T has an implicit
// constructor from any type).
//
// It won't work to unconditionally implict_cast
// polymorphic_matcher_or_value to Matcher<T> because it won't trigger
// a user-defined conversion from M to T if one exists (assuming M is
// a value).
return CastImpl(
polymorphic_matcher_or_value,
BooleanConstant<
internal::ImplicitlyConvertible<M, Matcher<T> >::value>(),
BooleanConstant<
internal::ImplicitlyConvertible<M, T>::value>());
}
private:
template <bool Ignore>
static Matcher<T> CastImpl(const M& polymorphic_matcher_or_value,
BooleanConstant<true> /* convertible_to_matcher */,
BooleanConstant<Ignore>) {
// M is implicitly convertible to Matcher<T>, which means that either
// M is a polymorphic matcher or Matcher<T> has an implicit constructor
// from M. In both cases using the implicit conversion will produce a
// matcher.
//
// Even if T has an implicit constructor from M, it won't be called because
// creating Matcher<T> would require a chain of two user-defined conversions
// (first to create T from M and then to create Matcher<T> from T).
return polymorphic_matcher_or_value;
}
// M can't be implicitly converted to Matcher<T>, so M isn't a polymorphic
// matcher. It's a value of a type implicitly convertible to T. Use direct
// initialization to create a matcher.
static Matcher<T> CastImpl(
const M& value, BooleanConstant<false> /* convertible_to_matcher */,
BooleanConstant<true> /* convertible_to_T */) {
return Matcher<T>(ImplicitCast_<T>(value));
}
// M can't be implicitly converted to either Matcher<T> or T. Attempt to use
// polymorphic matcher Eq(value) in this case.
//
// Note that we first attempt to perform an implicit cast on the value and
// only fall back to the polymorphic Eq() matcher afterwards because the
// latter calls bool operator==(const Lhs& lhs, const Rhs& rhs) in the end
// which might be undefined even when Rhs is implicitly convertible to Lhs
// (e.g. std::pair<const int, int> vs. std::pair<int, int>).
//
// We don't define this method inline as we need the declaration of Eq().
static Matcher<T> CastImpl(
const M& value, BooleanConstant<false> /* convertible_to_matcher */,
BooleanConstant<false> /* convertible_to_T */);
};
// This more specialized version is used when MatcherCast()'s argument
// is already a Matcher. This only compiles when type T can be
// statically converted to type U.
template <typename T, typename U>
class MatcherCastImpl<T, Matcher<U> > {
public:
static Matcher<T> Cast(const Matcher<U>& source_matcher) {
return Matcher<T>(new Impl(source_matcher));
}
private:
class Impl : public MatcherInterface<T> {
public:
explicit Impl(const Matcher<U>& source_matcher)
: source_matcher_(source_matcher) {}
// We delegate the matching logic to the source matcher.
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
#if GTEST_LANG_CXX11
using FromType = typename std::remove_cv<typename std::remove_pointer<
typename std::remove_reference<T>::type>::type>::type;
using ToType = typename std::remove_cv<typename std::remove_pointer<
typename std::remove_reference<U>::type>::type>::type;
// Do not allow implicitly converting base*/& to derived*/&.
static_assert(
// Do not trigger if only one of them is a pointer. That implies a
// regular conversion and not a down_cast.
(std::is_pointer<typename std::remove_reference<T>::type>::value !=
std::is_pointer<typename std::remove_reference<U>::type>::value) ||
std::is_same<FromType, ToType>::value ||
!std::is_base_of<FromType, ToType>::value,
"Can't implicitly convert from <base> to <derived>");
#endif // GTEST_LANG_CXX11
return source_matcher_.MatchAndExplain(static_cast<U>(x), listener);
}
virtual void DescribeTo(::std::ostream* os) const {
source_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
source_matcher_.DescribeNegationTo(os);
}
private:
const Matcher<U> source_matcher_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
};
// This even more specialized version is used for efficiently casting
// a matcher to its own type.
template <typename T>
class MatcherCastImpl<T, Matcher<T> > {
public:
static Matcher<T> Cast(const Matcher<T>& matcher) { return matcher; }
};
} // namespace internal
// In order to be safe and clear, casting between different matcher
// types is done explicitly via MatcherCast<T>(m), which takes a
// matcher m and returns a Matcher<T>. It compiles only when T can be
// statically converted to the argument type of m.
template <typename T, typename M>
inline Matcher<T> MatcherCast(const M& matcher) {
return internal::MatcherCastImpl<T, M>::Cast(matcher);
}
// Implements SafeMatcherCast().
//
// We use an intermediate class to do the actual safe casting as Nokia's
// Symbian compiler cannot decide between
// template <T, M> ... (M) and
// template <T, U> ... (const Matcher<U>&)
// for function templates but can for member function templates.
template <typename T>
class SafeMatcherCastImpl {
public:
// This overload handles polymorphic matchers and values only since
// monomorphic matchers are handled by the next one.
template <typename M>
static inline Matcher<T> Cast(const M& polymorphic_matcher_or_value) {
return internal::MatcherCastImpl<T, M>::Cast(polymorphic_matcher_or_value);
}
// This overload handles monomorphic matchers.
//
// In general, if type T can be implicitly converted to type U, we can
// safely convert a Matcher<U> to a Matcher<T> (i.e. Matcher is
// contravariant): just keep a copy of the original Matcher<U>, convert the
// argument from type T to U, and then pass it to the underlying Matcher<U>.
// The only exception is when U is a reference and T is not, as the
// underlying Matcher<U> may be interested in the argument's address, which
// is not preserved in the conversion from T to U.
template <typename U>
static inline Matcher<T> Cast(const Matcher<U>& matcher) {
// Enforce that T can be implicitly converted to U.
GTEST_COMPILE_ASSERT_((internal::ImplicitlyConvertible<T, U>::value),
T_must_be_implicitly_convertible_to_U);
// Enforce that we are not converting a non-reference type T to a reference
// type U.
GTEST_COMPILE_ASSERT_(
internal::is_reference<T>::value || !internal::is_reference<U>::value,
cannot_convert_non_reference_arg_to_reference);
// In case both T and U are arithmetic types, enforce that the
// conversion is not lossy.
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(T) RawT;
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(U) RawU;
const bool kTIsOther = GMOCK_KIND_OF_(RawT) == internal::kOther;
const bool kUIsOther = GMOCK_KIND_OF_(RawU) == internal::kOther;
GTEST_COMPILE_ASSERT_(
kTIsOther || kUIsOther ||
(internal::LosslessArithmeticConvertible<RawT, RawU>::value),
conversion_of_arithmetic_types_must_be_lossless);
return MatcherCast<T>(matcher);
}
};
template <typename T, typename M>
inline Matcher<T> SafeMatcherCast(const M& polymorphic_matcher) {
return SafeMatcherCastImpl<T>::Cast(polymorphic_matcher);
}
// A<T>() returns a matcher that matches any value of type T.
template <typename T>
Matcher<T> A();
// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
// and MUST NOT BE USED IN USER CODE!!!
namespace internal {
// If the explanation is not empty, prints it to the ostream.
inline void PrintIfNotEmpty(const std::string& explanation,
::std::ostream* os) {
if (explanation != "" && os != NULL) {
*os << ", " << explanation;
}
}
// Returns true if the given type name is easy to read by a human.
// This is used to decide whether printing the type of a value might
// be helpful.
inline bool IsReadableTypeName(const std::string& type_name) {
// We consider a type name readable if it's short or doesn't contain
// a template or function type.
return (type_name.length() <= 20 ||
type_name.find_first_of("<(") == std::string::npos);
}
// Matches the value against the given matcher, prints the value and explains
// the match result to the listener. Returns the match result.
// 'listener' must not be NULL.
// Value cannot be passed by const reference, because some matchers take a
// non-const argument.
template <typename Value, typename T>
bool MatchPrintAndExplain(Value& value, const Matcher<T>& matcher,
MatchResultListener* listener) {
if (!listener->IsInterested()) {
// If the listener is not interested, we do not need to construct the
// inner explanation.
return matcher.Matches(value);
}
StringMatchResultListener inner_listener;
const bool match = matcher.MatchAndExplain(value, &inner_listener);
UniversalPrint(value, listener->stream());
#if GTEST_HAS_RTTI
const std::string& type_name = GetTypeName<Value>();
if (IsReadableTypeName(type_name))
*listener->stream() << " (of type " << type_name << ")";
#endif
PrintIfNotEmpty(inner_listener.str(), listener->stream());
return match;
}
// An internal helper class for doing compile-time loop on a tuple's
// fields.
template <size_t N>
class TuplePrefix {
public:
// TuplePrefix<N>::Matches(matcher_tuple, value_tuple) returns true
// iff the first N fields of matcher_tuple matches the first N
// fields of value_tuple, respectively.
template <typename MatcherTuple, typename ValueTuple>
static bool Matches(const MatcherTuple& matcher_tuple,
const ValueTuple& value_tuple) {
return TuplePrefix<N - 1>::Matches(matcher_tuple, value_tuple)
&& get<N - 1>(matcher_tuple).Matches(get<N - 1>(value_tuple));
}
// TuplePrefix<N>::ExplainMatchFailuresTo(matchers, values, os)
// describes failures in matching the first N fields of matchers
// against the first N fields of values. If there is no failure,
// nothing will be streamed to os.
template <typename MatcherTuple, typename ValueTuple>
static void ExplainMatchFailuresTo(const MatcherTuple& matchers,
const ValueTuple& values,
::std::ostream* os) {
// First, describes failures in the first N - 1 fields.
TuplePrefix<N - 1>::ExplainMatchFailuresTo(matchers, values, os);
// Then describes the failure (if any) in the (N - 1)-th (0-based)
// field.
typename tuple_element<N - 1, MatcherTuple>::type matcher =
get<N - 1>(matchers);
typedef typename tuple_element<N - 1, ValueTuple>::type Value;
GTEST_REFERENCE_TO_CONST_(Value) value = get<N - 1>(values);
StringMatchResultListener listener;
if (!matcher.MatchAndExplain(value, &listener)) {
// FIXME: include in the message the name of the parameter
// as used in MOCK_METHOD*() when possible.
*os << " Expected arg #" << N - 1 << ": ";
get<N - 1>(matchers).DescribeTo(os);
*os << "\n Actual: ";
// We remove the reference in type Value to prevent the
// universal printer from printing the address of value, which
// isn't interesting to the user most of the time. The
// matcher's MatchAndExplain() method handles the case when
// the address is interesting.
internal::UniversalPrint(value, os);
PrintIfNotEmpty(listener.str(), os);
*os << "\n";
}
}
};
// The base case.
template <>
class TuplePrefix<0> {
public:
template <typename MatcherTuple, typename ValueTuple>
static bool Matches(const MatcherTuple& /* matcher_tuple */,
const ValueTuple& /* value_tuple */) {
return true;
}
template <typename MatcherTuple, typename ValueTuple>
static void ExplainMatchFailuresTo(const MatcherTuple& /* matchers */,
const ValueTuple& /* values */,
::std::ostream* /* os */) {}
};
// TupleMatches(matcher_tuple, value_tuple) returns true iff all
// matchers in matcher_tuple match the corresponding fields in
// value_tuple. It is a compiler error if matcher_tuple and
// value_tuple have different number of fields or incompatible field
// types.
template <typename MatcherTuple, typename ValueTuple>
bool TupleMatches(const MatcherTuple& matcher_tuple,
const ValueTuple& value_tuple) {
// Makes sure that matcher_tuple and value_tuple have the same
// number of fields.
GTEST_COMPILE_ASSERT_(tuple_size<MatcherTuple>::value ==
tuple_size<ValueTuple>::value,
matcher_and_value_have_different_numbers_of_fields);
return TuplePrefix<tuple_size<ValueTuple>::value>::
Matches(matcher_tuple, value_tuple);
}
// Describes failures in matching matchers against values. If there
// is no failure, nothing will be streamed to os.
template <typename MatcherTuple, typename ValueTuple>
void ExplainMatchFailureTupleTo(const MatcherTuple& matchers,
const ValueTuple& values,
::std::ostream* os) {
TuplePrefix<tuple_size<MatcherTuple>::value>::ExplainMatchFailuresTo(
matchers, values, os);
}
// TransformTupleValues and its helper.
//
// TransformTupleValuesHelper hides the internal machinery that
// TransformTupleValues uses to implement a tuple traversal.
template <typename Tuple, typename Func, typename OutIter>
class TransformTupleValuesHelper {
private:
typedef ::testing::tuple_size<Tuple> TupleSize;
public:
// For each member of tuple 't', taken in order, evaluates '*out++ = f(t)'.
// Returns the final value of 'out' in case the caller needs it.
static OutIter Run(Func f, const Tuple& t, OutIter out) {
return IterateOverTuple<Tuple, TupleSize::value>()(f, t, out);
}
private:
template <typename Tup, size_t kRemainingSize>
struct IterateOverTuple {
OutIter operator() (Func f, const Tup& t, OutIter out) const {
*out++ = f(::testing::get<TupleSize::value - kRemainingSize>(t));
return IterateOverTuple<Tup, kRemainingSize - 1>()(f, t, out);
}
};
template <typename Tup>
struct IterateOverTuple<Tup, 0> {
OutIter operator() (Func /* f */, const Tup& /* t */, OutIter out) const {
return out;
}
};
};
// Successively invokes 'f(element)' on each element of the tuple 't',
// appending each result to the 'out' iterator. Returns the final value
// of 'out'.
template <typename Tuple, typename Func, typename OutIter>
OutIter TransformTupleValues(Func f, const Tuple& t, OutIter out) {
return TransformTupleValuesHelper<Tuple, Func, OutIter>::Run(f, t, out);
}
// Implements A<T>().
template <typename T>
class AnyMatcherImpl : public MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)> {
public:
virtual bool MatchAndExplain(GTEST_REFERENCE_TO_CONST_(T) /* x */,
MatchResultListener* /* listener */) const {
return true;
}
virtual void DescribeTo(::std::ostream* os) const { *os << "is anything"; }
virtual void DescribeNegationTo(::std::ostream* os) const {
// This is mostly for completeness' safe, as it's not very useful
// to write Not(A<bool>()). However we cannot completely rule out
// such a possibility, and it doesn't hurt to be prepared.
*os << "never matches";
}
};
// Implements _, a matcher that matches any value of any
// type. This is a polymorphic matcher, so we need a template type
// conversion operator to make it appearing as a Matcher<T> for any
// type T.
class AnythingMatcher {
public:
template <typename T>
operator Matcher<T>() const { return A<T>(); }
};
// Implements a matcher that compares a given value with a
// pre-supplied value using one of the ==, <=, <, etc, operators. The
// two values being compared don't have to have the same type.
//
// The matcher defined here is polymorphic (for example, Eq(5) can be
// used to match an int, a short, a double, etc). Therefore we use
// a template type conversion operator in the implementation.
//
// The following template definition assumes that the Rhs parameter is
// a "bare" type (i.e. neither 'const T' nor 'T&').
template <typename D, typename Rhs, typename Op>
class ComparisonBase {
public:
explicit ComparisonBase(const Rhs& rhs) : rhs_(rhs) {}
template <typename Lhs>
operator Matcher<Lhs>() const {
return MakeMatcher(new Impl<Lhs>(rhs_));
}
private:
template <typename Lhs>
class Impl : public MatcherInterface<Lhs> {
public:
explicit Impl(const Rhs& rhs) : rhs_(rhs) {}
virtual bool MatchAndExplain(
Lhs lhs, MatchResultListener* /* listener */) const {
return Op()(lhs, rhs_);
}
virtual void DescribeTo(::std::ostream* os) const {
*os << D::Desc() << " ";
UniversalPrint(rhs_, os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << D::NegatedDesc() << " ";
UniversalPrint(rhs_, os);
}
private:
Rhs rhs_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
Rhs rhs_;
GTEST_DISALLOW_ASSIGN_(ComparisonBase);
};
template <typename Rhs>
class EqMatcher : public ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq> {
public:
explicit EqMatcher(const Rhs& rhs)
: ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq>(rhs) { }
static const char* Desc() { return "is equal to"; }
static const char* NegatedDesc() { return "isn't equal to"; }
};
template <typename Rhs>
class NeMatcher : public ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe> {
public:
explicit NeMatcher(const Rhs& rhs)
: ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe>(rhs) { }
static const char* Desc() { return "isn't equal to"; }
static const char* NegatedDesc() { return "is equal to"; }
};
template <typename Rhs>
class LtMatcher : public ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt> {
public:
explicit LtMatcher(const Rhs& rhs)
: ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt>(rhs) { }
static const char* Desc() { return "is <"; }
static const char* NegatedDesc() { return "isn't <"; }
};
template <typename Rhs>
class GtMatcher : public ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt> {
public:
explicit GtMatcher(const Rhs& rhs)
: ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt>(rhs) { }
static const char* Desc() { return "is >"; }
static const char* NegatedDesc() { return "isn't >"; }
};
template <typename Rhs>
class LeMatcher : public ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe> {
public:
explicit LeMatcher(const Rhs& rhs)
: ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe>(rhs) { }
static const char* Desc() { return "is <="; }
static const char* NegatedDesc() { return "isn't <="; }
};
template <typename Rhs>
class GeMatcher : public ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe> {
public:
explicit GeMatcher(const Rhs& rhs)
: ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe>(rhs) { }
static const char* Desc() { return "is >="; }
static const char* NegatedDesc() { return "isn't >="; }
};
// Implements the polymorphic IsNull() matcher, which matches any raw or smart
// pointer that is NULL.
class IsNullMatcher {
public:
template <typename Pointer>
bool MatchAndExplain(const Pointer& p,
MatchResultListener* /* listener */) const {
#if GTEST_LANG_CXX11
return p == nullptr;
#else // GTEST_LANG_CXX11
return GetRawPointer(p) == NULL;
#endif // GTEST_LANG_CXX11
}
void DescribeTo(::std::ostream* os) const { *os << "is NULL"; }
void DescribeNegationTo(::std::ostream* os) const {
*os << "isn't NULL";
}
};
// Implements the polymorphic NotNull() matcher, which matches any raw or smart
// pointer that is not NULL.
class NotNullMatcher {
public:
template <typename Pointer>
bool MatchAndExplain(const Pointer& p,
MatchResultListener* /* listener */) const {
#if GTEST_LANG_CXX11
return p != nullptr;
#else // GTEST_LANG_CXX11
return GetRawPointer(p) != NULL;
#endif // GTEST_LANG_CXX11
}
void DescribeTo(::std::ostream* os) const { *os << "isn't NULL"; }
void DescribeNegationTo(::std::ostream* os) const {
*os << "is NULL";
}
};
// Ref(variable) matches any argument that is a reference to
// 'variable'. This matcher is polymorphic as it can match any
// super type of the type of 'variable'.
//
// The RefMatcher template class implements Ref(variable). It can
// only be instantiated with a reference type. This prevents a user
// from mistakenly using Ref(x) to match a non-reference function
// argument. For example, the following will righteously cause a
// compiler error:
//
// int n;
// Matcher<int> m1 = Ref(n); // This won't compile.
// Matcher<int&> m2 = Ref(n); // This will compile.
template <typename T>
class RefMatcher;
template <typename T>
class RefMatcher<T&> {
// Google Mock is a generic framework and thus needs to support
// mocking any function types, including those that take non-const
// reference arguments. Therefore the template parameter T (and
// Super below) can be instantiated to either a const type or a
// non-const type.
public:
// RefMatcher() takes a T& instead of const T&, as we want the
// compiler to catch using Ref(const_value) as a matcher for a
// non-const reference.
explicit RefMatcher(T& x) : object_(x) {} // NOLINT
template <typename Super>
operator Matcher<Super&>() const {
// By passing object_ (type T&) to Impl(), which expects a Super&,
// we make sure that Super is a super type of T. In particular,
// this catches using Ref(const_value) as a matcher for a
// non-const reference, as you cannot implicitly convert a const
// reference to a non-const reference.
return MakeMatcher(new Impl<Super>(object_));
}
private:
template <typename Super>
class Impl : public MatcherInterface<Super&> {
public:
explicit Impl(Super& x) : object_(x) {} // NOLINT
// MatchAndExplain() takes a Super& (as opposed to const Super&)
// in order to match the interface MatcherInterface<Super&>.
virtual bool MatchAndExplain(
Super& x, MatchResultListener* listener) const {
*listener << "which is located @" << static_cast<const void*>(&x);
return &x == &object_;
}
virtual void DescribeTo(::std::ostream* os) const {
*os << "references the variable ";
UniversalPrinter<Super&>::Print(object_, os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "does not reference the variable ";
UniversalPrinter<Super&>::Print(object_, os);
}
private:
const Super& object_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
T& object_;
GTEST_DISALLOW_ASSIGN_(RefMatcher);
};
// Polymorphic helper functions for narrow and wide string matchers.
inline bool CaseInsensitiveCStringEquals(const char* lhs, const char* rhs) {
return String::CaseInsensitiveCStringEquals(lhs, rhs);
}
inline bool CaseInsensitiveCStringEquals(const wchar_t* lhs,
const wchar_t* rhs) {
return String::CaseInsensitiveWideCStringEquals(lhs, rhs);
}
// String comparison for narrow or wide strings that can have embedded NUL
// characters.
template <typename StringType>
bool CaseInsensitiveStringEquals(const StringType& s1,
const StringType& s2) {
// Are the heads equal?
if (!CaseInsensitiveCStringEquals(s1.c_str(), s2.c_str())) {
return false;
}
// Skip the equal heads.
const typename StringType::value_type nul = 0;
const size_t i1 = s1.find(nul), i2 = s2.find(nul);
// Are we at the end of either s1 or s2?
if (i1 == StringType::npos || i2 == StringType::npos) {
return i1 == i2;
}
// Are the tails equal?
return CaseInsensitiveStringEquals(s1.substr(i1 + 1), s2.substr(i2 + 1));
}
// String matchers.
// Implements equality-based string matchers like StrEq, StrCaseNe, and etc.
template <typename StringType>
class StrEqualityMatcher {
public:
StrEqualityMatcher(const StringType& str, bool expect_eq,
bool case_sensitive)
: string_(str), expect_eq_(expect_eq), case_sensitive_(case_sensitive) {}
#if GTEST_HAS_ABSL
bool MatchAndExplain(const absl::string_view& s,
MatchResultListener* listener) const {
if (s.data() == NULL) {
return !expect_eq_;
}
// This should fail to compile if absl::string_view is used with wide
// strings.
const StringType& str = string(s);
return MatchAndExplain(str, listener);
}
#endif // GTEST_HAS_ABSL
// Accepts pointer types, particularly:
// const char*
// char*
// const wchar_t*
// wchar_t*
template <typename CharType>
bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
if (s == NULL) {
return !expect_eq_;
}
return MatchAndExplain(StringType(s), listener);
}
// Matches anything that can convert to StringType.
//
// This is a template, not just a plain function with const StringType&,
// because absl::string_view has some interfering non-explicit constructors.
template <typename MatcheeStringType>
bool MatchAndExplain(const MatcheeStringType& s,
MatchResultListener* /* listener */) const {
const StringType& s2(s);
const bool eq = case_sensitive_ ? s2 == string_ :
CaseInsensitiveStringEquals(s2, string_);
return expect_eq_ == eq;
}
void DescribeTo(::std::ostream* os) const {
DescribeToHelper(expect_eq_, os);
}
void DescribeNegationTo(::std::ostream* os) const {
DescribeToHelper(!expect_eq_, os);
}
private:
void DescribeToHelper(bool expect_eq, ::std::ostream* os) const {
*os << (expect_eq ? "is " : "isn't ");
*os << "equal to ";
if (!case_sensitive_) {
*os << "(ignoring case) ";
}
UniversalPrint(string_, os);
}
const StringType string_;
const bool expect_eq_;
const bool case_sensitive_;
GTEST_DISALLOW_ASSIGN_(StrEqualityMatcher);
};
// Implements the polymorphic HasSubstr(substring) matcher, which
// can be used as a Matcher<T> as long as T can be converted to a
// string.
template <typename StringType>
class HasSubstrMatcher {
public:
explicit HasSubstrMatcher(const StringType& substring)
: substring_(substring) {}
#if GTEST_HAS_ABSL
bool MatchAndExplain(const absl::string_view& s,
MatchResultListener* listener) const {
if (s.data() == NULL) {
return false;
}
// This should fail to compile if absl::string_view is used with wide
// strings.
const StringType& str = string(s);
return MatchAndExplain(str, listener);
}
#endif // GTEST_HAS_ABSL
// Accepts pointer types, particularly:
// const char*
// char*
// const wchar_t*
// wchar_t*
template <typename CharType>
bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(StringType(s), listener);
}
// Matches anything that can convert to StringType.
//
// This is a template, not just a plain function with const StringType&,
// because absl::string_view has some interfering non-explicit constructors.
template <typename MatcheeStringType>
bool MatchAndExplain(const MatcheeStringType& s,
MatchResultListener* /* listener */) const {
const StringType& s2(s);
return s2.find(substring_) != StringType::npos;
}
// Describes what this matcher matches.
void DescribeTo(::std::ostream* os) const {
*os << "has substring ";
UniversalPrint(substring_, os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "has no substring ";
UniversalPrint(substring_, os);
}
private:
const StringType substring_;
GTEST_DISALLOW_ASSIGN_(HasSubstrMatcher);
};
// Implements the polymorphic StartsWith(substring) matcher, which
// can be used as a Matcher<T> as long as T can be converted to a
// string.
template <typename StringType>
class StartsWithMatcher {
public:
explicit StartsWithMatcher(const StringType& prefix) : prefix_(prefix) {
}
#if GTEST_HAS_ABSL
bool MatchAndExplain(const absl::string_view& s,
MatchResultListener* listener) const {
if (s.data() == NULL) {
return false;
}
// This should fail to compile if absl::string_view is used with wide
// strings.
const StringType& str = string(s);
return MatchAndExplain(str, listener);
}
#endif // GTEST_HAS_ABSL
// Accepts pointer types, particularly:
// const char*
// char*
// const wchar_t*
// wchar_t*
template <typename CharType>
bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(StringType(s), listener);
}
// Matches anything that can convert to StringType.
//
// This is a template, not just a plain function with const StringType&,
// because absl::string_view has some interfering non-explicit constructors.
template <typename MatcheeStringType>
bool MatchAndExplain(const MatcheeStringType& s,
MatchResultListener* /* listener */) const {
const StringType& s2(s);
return s2.length() >= prefix_.length() &&
s2.substr(0, prefix_.length()) == prefix_;
}
void DescribeTo(::std::ostream* os) const {
*os << "starts with ";
UniversalPrint(prefix_, os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't start with ";
UniversalPrint(prefix_, os);
}
private:
const StringType prefix_;
GTEST_DISALLOW_ASSIGN_(StartsWithMatcher);
};
// Implements the polymorphic EndsWith(substring) matcher, which
// can be used as a Matcher<T> as long as T can be converted to a
// string.
template <typename StringType>
class EndsWithMatcher {
public:
explicit EndsWithMatcher(const StringType& suffix) : suffix_(suffix) {}
#if GTEST_HAS_ABSL
bool MatchAndExplain(const absl::string_view& s,
MatchResultListener* listener) const {
if (s.data() == NULL) {
return false;
}
// This should fail to compile if absl::string_view is used with wide
// strings.
const StringType& str = string(s);
return MatchAndExplain(str, listener);
}
#endif // GTEST_HAS_ABSL
// Accepts pointer types, particularly:
// const char*
// char*
// const wchar_t*
// wchar_t*
template <typename CharType>
bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(StringType(s), listener);
}
// Matches anything that can convert to StringType.
//
// This is a template, not just a plain function with const StringType&,
// because absl::string_view has some interfering non-explicit constructors.
template <typename MatcheeStringType>
bool MatchAndExplain(const MatcheeStringType& s,
MatchResultListener* /* listener */) const {
const StringType& s2(s);
return s2.length() >= suffix_.length() &&
s2.substr(s2.length() - suffix_.length()) == suffix_;
}
void DescribeTo(::std::ostream* os) const {
*os << "ends with ";
UniversalPrint(suffix_, os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't end with ";
UniversalPrint(suffix_, os);
}
private:
const StringType suffix_;
GTEST_DISALLOW_ASSIGN_(EndsWithMatcher);
};
// Implements polymorphic matchers MatchesRegex(regex) and
// ContainsRegex(regex), which can be used as a Matcher<T> as long as
// T can be converted to a string.
class MatchesRegexMatcher {
public:
MatchesRegexMatcher(const RE* regex, bool full_match)
: regex_(regex), full_match_(full_match) {}
#if GTEST_HAS_ABSL
bool MatchAndExplain(const absl::string_view& s,
MatchResultListener* listener) const {
return s.data() && MatchAndExplain(string(s), listener);
}
#endif // GTEST_HAS_ABSL
// Accepts pointer types, particularly:
// const char*
// char*
// const wchar_t*
// wchar_t*
template <typename CharType>
bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(std::string(s), listener);
}
// Matches anything that can convert to std::string.
//
// This is a template, not just a plain function with const std::string&,
// because absl::string_view has some interfering non-explicit constructors.
template <class MatcheeStringType>
bool MatchAndExplain(const MatcheeStringType& s,
MatchResultListener* /* listener */) const {
const std::string& s2(s);
return full_match_ ? RE::FullMatch(s2, *regex_) :
RE::PartialMatch(s2, *regex_);
}
void DescribeTo(::std::ostream* os) const {
*os << (full_match_ ? "matches" : "contains")
<< " regular expression ";
UniversalPrinter<std::string>::Print(regex_->pattern(), os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't " << (full_match_ ? "match" : "contain")
<< " regular expression ";
UniversalPrinter<std::string>::Print(regex_->pattern(), os);
}
private:
const internal::linked_ptr<const RE> regex_;
const bool full_match_;
GTEST_DISALLOW_ASSIGN_(MatchesRegexMatcher);
};
// Implements a matcher that compares the two fields of a 2-tuple
// using one of the ==, <=, <, etc, operators. The two fields being
// compared don't have to have the same type.
//
// The matcher defined here is polymorphic (for example, Eq() can be
// used to match a tuple<int, short>, a tuple<const long&, double>,
// etc). Therefore we use a template type conversion operator in the
// implementation.
template <typename D, typename Op>
class PairMatchBase {
public:
template <typename T1, typename T2>
operator Matcher< ::testing::tuple<T1, T2> >() const {
return MakeMatcher(new Impl< ::testing::tuple<T1, T2> >);
}
template <typename T1, typename T2>
operator Matcher<const ::testing::tuple<T1, T2>&>() const {
return MakeMatcher(new Impl<const ::testing::tuple<T1, T2>&>);
}
private:
static ::std::ostream& GetDesc(::std::ostream& os) { // NOLINT
return os << D::Desc();
}
template <typename Tuple>
class Impl : public MatcherInterface<Tuple> {
public:
virtual bool MatchAndExplain(
Tuple args,
MatchResultListener* /* listener */) const {
return Op()(::testing::get<0>(args), ::testing::get<1>(args));
}
virtual void DescribeTo(::std::ostream* os) const {
*os << "are " << GetDesc;
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "aren't " << GetDesc;
}
};
};
class Eq2Matcher : public PairMatchBase<Eq2Matcher, AnyEq> {
public:
static const char* Desc() { return "an equal pair"; }
};
class Ne2Matcher : public PairMatchBase<Ne2Matcher, AnyNe> {
public:
static const char* Desc() { return "an unequal pair"; }
};
class Lt2Matcher : public PairMatchBase<Lt2Matcher, AnyLt> {
public:
static const char* Desc() { return "a pair where the first < the second"; }
};
class Gt2Matcher : public PairMatchBase<Gt2Matcher, AnyGt> {
public:
static const char* Desc() { return "a pair where the first > the second"; }
};
class Le2Matcher : public PairMatchBase<Le2Matcher, AnyLe> {
public:
static const char* Desc() { return "a pair where the first <= the second"; }
};
class Ge2Matcher : public PairMatchBase<Ge2Matcher, AnyGe> {
public:
static const char* Desc() { return "a pair where the first >= the second"; }
};
// Implements the Not(...) matcher for a particular argument type T.
// We do not nest it inside the NotMatcher class template, as that
// will prevent different instantiations of NotMatcher from sharing
// the same NotMatcherImpl<T> class.
template <typename T>
class NotMatcherImpl : public MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)> {
public:
explicit NotMatcherImpl(const Matcher<T>& matcher)
: matcher_(matcher) {}
virtual bool MatchAndExplain(GTEST_REFERENCE_TO_CONST_(T) x,
MatchResultListener* listener) const {
return !matcher_.MatchAndExplain(x, listener);
}
virtual void DescribeTo(::std::ostream* os) const {
matcher_.DescribeNegationTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
matcher_.DescribeTo(os);
}
private:
const Matcher<T> matcher_;
GTEST_DISALLOW_ASSIGN_(NotMatcherImpl);
};
// Implements the Not(m) matcher, which matches a value that doesn't
// match matcher m.
template <typename InnerMatcher>
class NotMatcher {
public:
explicit NotMatcher(InnerMatcher matcher) : matcher_(matcher) {}
// This template type conversion operator allows Not(m) to be used
// to match any type m can match.
template <typename T>
operator Matcher<T>() const {
return Matcher<T>(new NotMatcherImpl<T>(SafeMatcherCast<T>(matcher_)));
}
private:
InnerMatcher matcher_;
GTEST_DISALLOW_ASSIGN_(NotMatcher);
};
// Implements the AllOf(m1, m2) matcher for a particular argument type
// T. We do not nest it inside the BothOfMatcher class template, as
// that will prevent different instantiations of BothOfMatcher from
// sharing the same BothOfMatcherImpl<T> class.
template <typename T>
class AllOfMatcherImpl
: public MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)> {
public:
explicit AllOfMatcherImpl(std::vector<Matcher<T> > matchers)
: matchers_(internal::move(matchers)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "(";
for (size_t i = 0; i < matchers_.size(); ++i) {
if (i != 0) *os << ") and (";
matchers_[i].DescribeTo(os);
}
*os << ")";
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "(";
for (size_t i = 0; i < matchers_.size(); ++i) {
if (i != 0) *os << ") or (";
matchers_[i].DescribeNegationTo(os);
}
*os << ")";
}
virtual bool MatchAndExplain(GTEST_REFERENCE_TO_CONST_(T) x,
MatchResultListener* listener) const {
// If either matcher1_ or matcher2_ doesn't match x, we only need
// to explain why one of them fails.
std::string all_match_result;
for (size_t i = 0; i < matchers_.size(); ++i) {
StringMatchResultListener slistener;
if (matchers_[i].MatchAndExplain(x, &slistener)) {
if (all_match_result.empty()) {
all_match_result = slistener.str();
} else {
std::string result = slistener.str();
if (!result.empty()) {
all_match_result += ", and ";
all_match_result += result;
}
}
} else {
*listener << slistener.str();
return false;
}
}
// Otherwise we need to explain why *both* of them match.
*listener << all_match_result;
return true;
}
private:
const std::vector<Matcher<T> > matchers_;
GTEST_DISALLOW_ASSIGN_(AllOfMatcherImpl);
};
#if GTEST_LANG_CXX11
// VariadicMatcher is used for the variadic implementation of
// AllOf(m_1, m_2, ...) and AnyOf(m_1, m_2, ...).
// CombiningMatcher<T> is used to recursively combine the provided matchers
// (of type Args...).
template <template <typename T> class CombiningMatcher, typename... Args>
class VariadicMatcher {
public:
VariadicMatcher(const Args&... matchers) // NOLINT
: matchers_(matchers...) {
static_assert(sizeof...(Args) > 0, "Must have at least one matcher.");
}
// This template type conversion operator allows an
// VariadicMatcher<Matcher1, Matcher2...> object to match any type that
// all of the provided matchers (Matcher1, Matcher2, ...) can match.
template <typename T>
operator Matcher<T>() const {
std::vector<Matcher<T> > values;
CreateVariadicMatcher<T>(&values, std::integral_constant<size_t, 0>());
return Matcher<T>(new CombiningMatcher<T>(internal::move(values)));
}
private:
template <typename T, size_t I>
void CreateVariadicMatcher(std::vector<Matcher<T> >* values,
std::integral_constant<size_t, I>) const {
values->push_back(SafeMatcherCast<T>(std::get<I>(matchers_)));
CreateVariadicMatcher<T>(values, std::integral_constant<size_t, I + 1>());
}
template <typename T>
void CreateVariadicMatcher(
std::vector<Matcher<T> >*,
std::integral_constant<size_t, sizeof...(Args)>) const {}
tuple<Args...> matchers_;
GTEST_DISALLOW_ASSIGN_(VariadicMatcher);
};
template <typename... Args>
using AllOfMatcher = VariadicMatcher<AllOfMatcherImpl, Args...>;
#endif // GTEST_LANG_CXX11
// Used for implementing the AllOf(m_1, ..., m_n) matcher, which
// matches a value that matches all of the matchers m_1, ..., and m_n.
template <typename Matcher1, typename Matcher2>
class BothOfMatcher {
public:
BothOfMatcher(Matcher1 matcher1, Matcher2 matcher2)
: matcher1_(matcher1), matcher2_(matcher2) {}
// This template type conversion operator allows a
// BothOfMatcher<Matcher1, Matcher2> object to match any type that
// both Matcher1 and Matcher2 can match.
template <typename T>
operator Matcher<T>() const {
std::vector<Matcher<T> > values;
values.push_back(SafeMatcherCast<T>(matcher1_));
values.push_back(SafeMatcherCast<T>(matcher2_));
return Matcher<T>(new AllOfMatcherImpl<T>(internal::move(values)));
}
private:
Matcher1 matcher1_;
Matcher2 matcher2_;
GTEST_DISALLOW_ASSIGN_(BothOfMatcher);
};
// Implements the AnyOf(m1, m2) matcher for a particular argument type
// T. We do not nest it inside the AnyOfMatcher class template, as
// that will prevent different instantiations of AnyOfMatcher from
// sharing the same EitherOfMatcherImpl<T> class.
template <typename T>
class AnyOfMatcherImpl
: public MatcherInterface<GTEST_REFERENCE_TO_CONST_(T)> {
public:
explicit AnyOfMatcherImpl(std::vector<Matcher<T> > matchers)
: matchers_(internal::move(matchers)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "(";
for (size_t i = 0; i < matchers_.size(); ++i) {
if (i != 0) *os << ") or (";
matchers_[i].DescribeTo(os);
}
*os << ")";
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "(";
for (size_t i = 0; i < matchers_.size(); ++i) {
if (i != 0) *os << ") and (";
matchers_[i].DescribeNegationTo(os);
}
*os << ")";
}
virtual bool MatchAndExplain(GTEST_REFERENCE_TO_CONST_(T) x,
MatchResultListener* listener) const {
std::string no_match_result;
// If either matcher1_ or matcher2_ matches x, we just need to
// explain why *one* of them matches.
for (size_t i = 0; i < matchers_.size(); ++i) {
StringMatchResultListener slistener;
if (matchers_[i].MatchAndExplain(x, &slistener)) {
*listener << slistener.str();
return true;
} else {
if (no_match_result.empty()) {
no_match_result = slistener.str();
} else {
std::string result = slistener.str();
if (!result.empty()) {
no_match_result += ", and ";
no_match_result += result;
}
}
}
}
// Otherwise we need to explain why *both* of them fail.
*listener << no_match_result;
return false;
}
private:
const std::vector<Matcher<T> > matchers_;
GTEST_DISALLOW_ASSIGN_(AnyOfMatcherImpl);
};
#if GTEST_LANG_CXX11
// AnyOfMatcher is used for the variadic implementation of AnyOf(m_1, m_2, ...).
template <typename... Args>
using AnyOfMatcher = VariadicMatcher<AnyOfMatcherImpl, Args...>;
#endif // GTEST_LANG_CXX11
// Used for implementing the AnyOf(m_1, ..., m_n) matcher, which
// matches a value that matches at least one of the matchers m_1, ...,
// and m_n.
template <typename Matcher1, typename Matcher2>
class EitherOfMatcher {
public:
EitherOfMatcher(Matcher1 matcher1, Matcher2 matcher2)
: matcher1_(matcher1), matcher2_(matcher2) {}
// This template type conversion operator allows a
// EitherOfMatcher<Matcher1, Matcher2> object to match any type that
// both Matcher1 and Matcher2 can match.
template <typename T>
operator Matcher<T>() const {
std::vector<Matcher<T> > values;
values.push_back(SafeMatcherCast<T>(matcher1_));
values.push_back(SafeMatcherCast<T>(matcher2_));
return Matcher<T>(new AnyOfMatcherImpl<T>(internal::move(values)));
}
private:
Matcher1 matcher1_;
Matcher2 matcher2_;
GTEST_DISALLOW_ASSIGN_(EitherOfMatcher);
};
// Used for implementing Truly(pred), which turns a predicate into a
// matcher.
template <typename Predicate>
class TrulyMatcher {
public:
explicit TrulyMatcher(Predicate pred) : predicate_(pred) {}
// This method template allows Truly(pred) to be used as a matcher
// for type T where T is the argument type of predicate 'pred'. The
// argument is passed by reference as the predicate may be
// interested in the address of the argument.
template <typename T>
bool MatchAndExplain(T& x, // NOLINT
MatchResultListener* /* listener */) const {
// Without the if-statement, MSVC sometimes warns about converting
// a value to bool (warning 4800).
//
// We cannot write 'return !!predicate_(x);' as that doesn't work
// when predicate_(x) returns a class convertible to bool but
// having no operator!().
if (predicate_(x))
return true;
return false;
}
void DescribeTo(::std::ostream* os) const {
*os << "satisfies the given predicate";
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't satisfy the given predicate";
}
private:
Predicate predicate_;
GTEST_DISALLOW_ASSIGN_(TrulyMatcher);
};
// Used for implementing Matches(matcher), which turns a matcher into
// a predicate.
template <typename M>
class MatcherAsPredicate {
public:
explicit MatcherAsPredicate(M matcher) : matcher_(matcher) {}
// This template operator() allows Matches(m) to be used as a
// predicate on type T where m is a matcher on type T.
//
// The argument x is passed by reference instead of by value, as
// some matcher may be interested in its address (e.g. as in
// Matches(Ref(n))(x)).
template <typename T>
bool operator()(const T& x) const {
// We let matcher_ commit to a particular type here instead of
// when the MatcherAsPredicate object was constructed. This
// allows us to write Matches(m) where m is a polymorphic matcher
// (e.g. Eq(5)).
//
// If we write Matcher<T>(matcher_).Matches(x) here, it won't
// compile when matcher_ has type Matcher<const T&>; if we write
// Matcher<const T&>(matcher_).Matches(x) here, it won't compile
// when matcher_ has type Matcher<T>; if we just write
// matcher_.Matches(x), it won't compile when matcher_ is
// polymorphic, e.g. Eq(5).
//
// MatcherCast<const T&>() is necessary for making the code work
// in all of the above situations.
return MatcherCast<const T&>(matcher_).Matches(x);
}
private:
M matcher_;
GTEST_DISALLOW_ASSIGN_(MatcherAsPredicate);
};
// For implementing ASSERT_THAT() and EXPECT_THAT(). The template
// argument M must be a type that can be converted to a matcher.
template <typename M>
class PredicateFormatterFromMatcher {
public:
explicit PredicateFormatterFromMatcher(M m) : matcher_(internal::move(m)) {}
// This template () operator allows a PredicateFormatterFromMatcher
// object to act as a predicate-formatter suitable for using with
// Google Test's EXPECT_PRED_FORMAT1() macro.
template <typename T>
AssertionResult operator()(const char* value_text, const T& x) const {
// We convert matcher_ to a Matcher<const T&> *now* instead of
// when the PredicateFormatterFromMatcher object was constructed,
// as matcher_ may be polymorphic (e.g. NotNull()) and we won't
// know which type to instantiate it to until we actually see the
// type of x here.
//
// We write SafeMatcherCast<const T&>(matcher_) instead of
// Matcher<const T&>(matcher_), as the latter won't compile when
// matcher_ has type Matcher<T> (e.g. An<int>()).
// We don't write MatcherCast<const T&> either, as that allows
// potentially unsafe downcasting of the matcher argument.
const Matcher<const T&> matcher = SafeMatcherCast<const T&>(matcher_);
StringMatchResultListener listener;
if (MatchPrintAndExplain(x, matcher, &listener))
return AssertionSuccess();
::std::stringstream ss;
ss << "Value of: " << value_text << "\n"
<< "Expected: ";
matcher.DescribeTo(&ss);
ss << "\n Actual: " << listener.str();
return AssertionFailure() << ss.str();
}
private:
const M matcher_;
GTEST_DISALLOW_ASSIGN_(PredicateFormatterFromMatcher);
};
// A helper function for converting a matcher to a predicate-formatter
// without the user needing to explicitly write the type. This is
// used for implementing ASSERT_THAT() and EXPECT_THAT().
// Implementation detail: 'matcher' is received by-value to force decaying.
template <typename M>
inline PredicateFormatterFromMatcher<M>
MakePredicateFormatterFromMatcher(M matcher) {
return PredicateFormatterFromMatcher<M>(internal::move(matcher));
}
// Implements the polymorphic floating point equality matcher, which matches
// two float values using ULP-based approximation or, optionally, a
// user-specified epsilon. The template is meant to be instantiated with
// FloatType being either float or double.
template <typename FloatType>
class FloatingEqMatcher {
public:
// Constructor for FloatingEqMatcher.
// The matcher's input will be compared with expected. The matcher treats two
// NANs as equal if nan_eq_nan is true. Otherwise, under IEEE standards,
// equality comparisons between NANs will always return false. We specify a
// negative max_abs_error_ term to indicate that ULP-based approximation will
// be used for comparison.
FloatingEqMatcher(FloatType expected, bool nan_eq_nan) :
expected_(expected), nan_eq_nan_(nan_eq_nan), max_abs_error_(-1) {
}
// Constructor that supports a user-specified max_abs_error that will be used
// for comparison instead of ULP-based approximation. The max absolute
// should be non-negative.
FloatingEqMatcher(FloatType expected, bool nan_eq_nan,
FloatType max_abs_error)
: expected_(expected),
nan_eq_nan_(nan_eq_nan),
max_abs_error_(max_abs_error) {
GTEST_CHECK_(max_abs_error >= 0)
<< ", where max_abs_error is" << max_abs_error;
}
// Implements floating point equality matcher as a Matcher<T>.
template <typename T>
class Impl : public MatcherInterface<T> {
public:
Impl(FloatType expected, bool nan_eq_nan, FloatType max_abs_error)
: expected_(expected),
nan_eq_nan_(nan_eq_nan),
max_abs_error_(max_abs_error) {}
virtual bool MatchAndExplain(T value,
MatchResultListener* listener) const {
const FloatingPoint<FloatType> actual(value), expected(expected_);
// Compares NaNs first, if nan_eq_nan_ is true.
if (actual.is_nan() || expected.is_nan()) {
if (actual.is_nan() && expected.is_nan()) {
return nan_eq_nan_;
}
// One is nan; the other is not nan.
return false;
}
if (HasMaxAbsError()) {
// We perform an equality check so that inf will match inf, regardless
// of error bounds. If the result of value - expected_ would result in
// overflow or if either value is inf, the default result is infinity,
// which should only match if max_abs_error_ is also infinity.
if (value == expected_) {
return true;
}
const FloatType diff = value - expected_;
if (fabs(diff) <= max_abs_error_) {
return true;
}
if (listener->IsInterested()) {
*listener << "which is " << diff << " from " << expected_;
}
return false;
} else {
return actual.AlmostEquals(expected);
}
}
virtual void DescribeTo(::std::ostream* os) const {
// os->precision() returns the previously set precision, which we
// store to restore the ostream to its original configuration
// after outputting.
const ::std::streamsize old_precision = os->precision(
::std::numeric_limits<FloatType>::digits10 + 2);
if (FloatingPoint<FloatType>(expected_).is_nan()) {
if (nan_eq_nan_) {
*os << "is NaN";
} else {
*os << "never matches";
}
} else {
*os << "is approximately " << expected_;
if (HasMaxAbsError()) {
*os << " (absolute error <= " << max_abs_error_ << ")";
}
}
os->precision(old_precision);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
// As before, get original precision.
const ::std::streamsize old_precision = os->precision(
::std::numeric_limits<FloatType>::digits10 + 2);
if (FloatingPoint<FloatType>(expected_).is_nan()) {
if (nan_eq_nan_) {
*os << "isn't NaN";
} else {
*os << "is anything";
}
} else {
*os << "isn't approximately " << expected_;
if (HasMaxAbsError()) {
*os << " (absolute error > " << max_abs_error_ << ")";
}
}
// Restore original precision.
os->precision(old_precision);
}
private:
bool HasMaxAbsError() const {
return max_abs_error_ >= 0;
}
const FloatType expected_;
const bool nan_eq_nan_;
// max_abs_error will be used for value comparison when >= 0.
const FloatType max_abs_error_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
// The following 3 type conversion operators allow FloatEq(expected) and
// NanSensitiveFloatEq(expected) to be used as a Matcher<float>, a
// Matcher<const float&>, or a Matcher<float&>, but nothing else.
// (While Google's C++ coding style doesn't allow arguments passed
// by non-const reference, we may see them in code not conforming to
// the style. Therefore Google Mock needs to support them.)
operator Matcher<FloatType>() const {
return MakeMatcher(
new Impl<FloatType>(expected_, nan_eq_nan_, max_abs_error_));
}
operator Matcher<const FloatType&>() const {
return MakeMatcher(
new Impl<const FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
}
operator Matcher<FloatType&>() const {
return MakeMatcher(
new Impl<FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
}
private:
const FloatType expected_;
const bool nan_eq_nan_;
// max_abs_error will be used for value comparison when >= 0.
const FloatType max_abs_error_;
GTEST_DISALLOW_ASSIGN_(FloatingEqMatcher);
};
// A 2-tuple ("binary") wrapper around FloatingEqMatcher:
// FloatingEq2Matcher() matches (x, y) by matching FloatingEqMatcher(x, false)
// against y, and FloatingEq2Matcher(e) matches FloatingEqMatcher(x, false, e)
// against y. The former implements "Eq", the latter "Near". At present, there
// is no version that compares NaNs as equal.
template <typename FloatType>
class FloatingEq2Matcher {
public:
FloatingEq2Matcher() { Init(-1, false); }
explicit FloatingEq2Matcher(bool nan_eq_nan) { Init(-1, nan_eq_nan); }
explicit FloatingEq2Matcher(FloatType max_abs_error) {
Init(max_abs_error, false);
}
FloatingEq2Matcher(FloatType max_abs_error, bool nan_eq_nan) {
Init(max_abs_error, nan_eq_nan);
}
template <typename T1, typename T2>
operator Matcher< ::testing::tuple<T1, T2> >() const {
return MakeMatcher(
new Impl< ::testing::tuple<T1, T2> >(max_abs_error_, nan_eq_nan_));
}
template <typename T1, typename T2>
operator Matcher<const ::testing::tuple<T1, T2>&>() const {
return MakeMatcher(
new Impl<const ::testing::tuple<T1, T2>&>(max_abs_error_, nan_eq_nan_));
}
private:
static ::std::ostream& GetDesc(::std::ostream& os) { // NOLINT
return os << "an almost-equal pair";
}
template <typename Tuple>
class Impl : public MatcherInterface<Tuple> {
public:
Impl(FloatType max_abs_error, bool nan_eq_nan) :
max_abs_error_(max_abs_error),
nan_eq_nan_(nan_eq_nan) {}
virtual bool MatchAndExplain(Tuple args,
MatchResultListener* listener) const {
if (max_abs_error_ == -1) {
FloatingEqMatcher<FloatType> fm(::testing::get<0>(args), nan_eq_nan_);
return static_cast<Matcher<FloatType> >(fm).MatchAndExplain(
::testing::get<1>(args), listener);
} else {
FloatingEqMatcher<FloatType> fm(::testing::get<0>(args), nan_eq_nan_,
max_abs_error_);
return static_cast<Matcher<FloatType> >(fm).MatchAndExplain(
::testing::get<1>(args), listener);
}
}
virtual void DescribeTo(::std::ostream* os) const {
*os << "are " << GetDesc;
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "aren't " << GetDesc;
}
private:
FloatType max_abs_error_;
const bool nan_eq_nan_;
};
void Init(FloatType max_abs_error_val, bool nan_eq_nan_val) {
max_abs_error_ = max_abs_error_val;
nan_eq_nan_ = nan_eq_nan_val;
}
FloatType max_abs_error_;
bool nan_eq_nan_;
};
// Implements the Pointee(m) matcher for matching a pointer whose
// pointee matches matcher m. The pointer can be either raw or smart.
template <typename InnerMatcher>
class PointeeMatcher {
public:
explicit PointeeMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
// This type conversion operator template allows Pointee(m) to be
// used as a matcher for any pointer type whose pointee type is
// compatible with the inner matcher, where type Pointer can be
// either a raw pointer or a smart pointer.
//
// The reason we do this instead of relying on
// MakePolymorphicMatcher() is that the latter is not flexible
// enough for implementing the DescribeTo() method of Pointee().
template <typename Pointer>
operator Matcher<Pointer>() const {
return Matcher<Pointer>(
new Impl<GTEST_REFERENCE_TO_CONST_(Pointer)>(matcher_));
}
private:
// The monomorphic implementation that works for a particular pointer type.
template <typename Pointer>
class Impl : public MatcherInterface<Pointer> {
public:
typedef typename PointeeOf<GTEST_REMOVE_CONST_( // NOLINT
GTEST_REMOVE_REFERENCE_(Pointer))>::type Pointee;
explicit Impl(const InnerMatcher& matcher)
: matcher_(MatcherCast<const Pointee&>(matcher)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "points to a value that ";
matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "does not point to a value that ";
matcher_.DescribeTo(os);
}
virtual bool MatchAndExplain(Pointer pointer,
MatchResultListener* listener) const {
if (GetRawPointer(pointer) == NULL)
return false;
*listener << "which points to ";
return MatchPrintAndExplain(*pointer, matcher_, listener);
}
private:
const Matcher<const Pointee&> matcher_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
const InnerMatcher matcher_;
GTEST_DISALLOW_ASSIGN_(PointeeMatcher);
};
#if GTEST_HAS_RTTI
// Implements the WhenDynamicCastTo<T>(m) matcher that matches a pointer or
// reference that matches inner_matcher when dynamic_cast<T> is applied.
// The result of dynamic_cast<To> is forwarded to the inner matcher.
// If To is a pointer and the cast fails, the inner matcher will receive NULL.
// If To is a reference and the cast fails, this matcher returns false
// immediately.
template <typename To>
class WhenDynamicCastToMatcherBase {
public:
explicit WhenDynamicCastToMatcherBase(const Matcher<To>& matcher)
: matcher_(matcher) {}
void DescribeTo(::std::ostream* os) const {
GetCastTypeDescription(os);
matcher_.DescribeTo(os);
}
void DescribeNegationTo(::std::ostream* os) const {
GetCastTypeDescription(os);
matcher_.DescribeNegationTo(os);
}
protected:
const Matcher<To> matcher_;
static std::string GetToName() {
return GetTypeName<To>();
}
private:
static void GetCastTypeDescription(::std::ostream* os) {
*os << "when dynamic_cast to " << GetToName() << ", ";
}
GTEST_DISALLOW_ASSIGN_(WhenDynamicCastToMatcherBase);
};
// Primary template.
// To is a pointer. Cast and forward the result.
template <typename To>
class WhenDynamicCastToMatcher : public WhenDynamicCastToMatcherBase<To> {
public:
explicit WhenDynamicCastToMatcher(const Matcher<To>& matcher)
: WhenDynamicCastToMatcherBase<To>(matcher) {}
template <typename From>
bool MatchAndExplain(From from, MatchResultListener* listener) const {
// FIXME: Add more detail on failures. ie did the dyn_cast fail?
To to = dynamic_cast<To>(from);
return MatchPrintAndExplain(to, this->matcher_, listener);
}
};
// Specialize for references.
// In this case we return false if the dynamic_cast fails.
template <typename To>
class WhenDynamicCastToMatcher<To&> : public WhenDynamicCastToMatcherBase<To&> {
public:
explicit WhenDynamicCastToMatcher(const Matcher<To&>& matcher)
: WhenDynamicCastToMatcherBase<To&>(matcher) {}
template <typename From>
bool MatchAndExplain(From& from, MatchResultListener* listener) const {
// We don't want an std::bad_cast here, so do the cast with pointers.
To* to = dynamic_cast<To*>(&from);
if (to == NULL) {
*listener << "which cannot be dynamic_cast to " << this->GetToName();
return false;
}
return MatchPrintAndExplain(*to, this->matcher_, listener);
}
};
#endif // GTEST_HAS_RTTI
// Implements the Field() matcher for matching a field (i.e. member
// variable) of an object.
template <typename Class, typename FieldType>
class FieldMatcher {
public:
FieldMatcher(FieldType Class::*field,
const Matcher<const FieldType&>& matcher)
: field_(field), matcher_(matcher), whose_field_("whose given field ") {}
FieldMatcher(const std::string& field_name, FieldType Class::*field,
const Matcher<const FieldType&>& matcher)
: field_(field),
matcher_(matcher),
whose_field_("whose field `" + field_name + "` ") {}
void DescribeTo(::std::ostream* os) const {
*os << "is an object " << whose_field_;
matcher_.DescribeTo(os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "is an object " << whose_field_;
matcher_.DescribeNegationTo(os);
}
template <typename T>
bool MatchAndExplain(const T& value, MatchResultListener* listener) const {
return MatchAndExplainImpl(
typename ::testing::internal::
is_pointer<GTEST_REMOVE_CONST_(T)>::type(),
value, listener);
}
private:
// The first argument of MatchAndExplainImpl() is needed to help
// Symbian's C++ compiler choose which overload to use. Its type is
// true_type iff the Field() matcher is used to match a pointer.
bool MatchAndExplainImpl(false_type /* is_not_pointer */, const Class& obj,
MatchResultListener* listener) const {
*listener << whose_field_ << "is ";
return MatchPrintAndExplain(obj.*field_, matcher_, listener);
}
bool MatchAndExplainImpl(true_type /* is_pointer */, const Class* p,
MatchResultListener* listener) const {
if (p == NULL)
return false;
*listener << "which points to an object ";
// Since *p has a field, it must be a class/struct/union type and
// thus cannot be a pointer. Therefore we pass false_type() as
// the first argument.
return MatchAndExplainImpl(false_type(), *p, listener);
}
const FieldType Class::*field_;
const Matcher<const FieldType&> matcher_;
// Contains either "whose given field " if the name of the field is unknown
// or "whose field `name_of_field` " if the name is known.
const std::string whose_field_;
GTEST_DISALLOW_ASSIGN_(FieldMatcher);
};
// Implements the Property() matcher for matching a property
// (i.e. return value of a getter method) of an object.
//
// Property is a const-qualified member function of Class returning
// PropertyType.
template <typename Class, typename PropertyType, typename Property>
class PropertyMatcher {
public:
// The property may have a reference type, so 'const PropertyType&'
// may cause double references and fail to compile. That's why we
// need GTEST_REFERENCE_TO_CONST, which works regardless of
// PropertyType being a reference or not.
typedef GTEST_REFERENCE_TO_CONST_(PropertyType) RefToConstProperty;
PropertyMatcher(Property property, const Matcher<RefToConstProperty>& matcher)
: property_(property),
matcher_(matcher),
whose_property_("whose given property ") {}
PropertyMatcher(const std::string& property_name, Property property,
const Matcher<RefToConstProperty>& matcher)
: property_(property),
matcher_(matcher),
whose_property_("whose property `" + property_name + "` ") {}
void DescribeTo(::std::ostream* os) const {
*os << "is an object " << whose_property_;
matcher_.DescribeTo(os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "is an object " << whose_property_;
matcher_.DescribeNegationTo(os);
}
template <typename T>
bool MatchAndExplain(const T&value, MatchResultListener* listener) const {
return MatchAndExplainImpl(
typename ::testing::internal::
is_pointer<GTEST_REMOVE_CONST_(T)>::type(),
value, listener);
}
private:
// The first argument of MatchAndExplainImpl() is needed to help
// Symbian's C++ compiler choose which overload to use. Its type is
// true_type iff the Property() matcher is used to match a pointer.
bool MatchAndExplainImpl(false_type /* is_not_pointer */, const Class& obj,
MatchResultListener* listener) const {
*listener << whose_property_ << "is ";
// Cannot pass the return value (for example, int) to MatchPrintAndExplain,
// which takes a non-const reference as argument.
#if defined(_PREFAST_ ) && _MSC_VER == 1800
// Workaround bug in VC++ 2013's /analyze parser.
// https://connect.microsoft.com/VisualStudio/feedback/details/1106363/internal-compiler-error-with-analyze-due-to-failure-to-infer-move
posix::Abort(); // To make sure it is never run.
return false;
#else
RefToConstProperty result = (obj.*property_)();
return MatchPrintAndExplain(result, matcher_, listener);
#endif
}
bool MatchAndExplainImpl(true_type /* is_pointer */, const Class* p,
MatchResultListener* listener) const {
if (p == NULL)
return false;
*listener << "which points to an object ";
// Since *p has a property method, it must be a class/struct/union
// type and thus cannot be a pointer. Therefore we pass
// false_type() as the first argument.
return MatchAndExplainImpl(false_type(), *p, listener);
}
Property property_;
const Matcher<RefToConstProperty> matcher_;
// Contains either "whose given property " if the name of the property is
// unknown or "whose property `name_of_property` " if the name is known.
const std::string whose_property_;
GTEST_DISALLOW_ASSIGN_(PropertyMatcher);
};
// Type traits specifying various features of different functors for ResultOf.
// The default template specifies features for functor objects.
template <typename Functor>
struct CallableTraits {
typedef Functor StorageType;
static void CheckIsValid(Functor /* functor */) {}
#if GTEST_LANG_CXX11
template <typename T>
static auto Invoke(Functor f, T arg) -> decltype(f(arg)) { return f(arg); }
#else
typedef typename Functor::result_type ResultType;
template <typename T>
static ResultType Invoke(Functor f, T arg) { return f(arg); }
#endif
};
// Specialization for function pointers.
template <typename ArgType, typename ResType>
struct CallableTraits<ResType(*)(ArgType)> {
typedef ResType ResultType;
typedef ResType(*StorageType)(ArgType);
static void CheckIsValid(ResType(*f)(ArgType)) {
GTEST_CHECK_(f != NULL)
<< "NULL function pointer is passed into ResultOf().";
}
template <typename T>
static ResType Invoke(ResType(*f)(ArgType), T arg) {
return (*f)(arg);
}
};
// Implements the ResultOf() matcher for matching a return value of a
// unary function of an object.
template <typename Callable, typename InnerMatcher>
class ResultOfMatcher {
public:
ResultOfMatcher(Callable callable, InnerMatcher matcher)
: callable_(internal::move(callable)), matcher_(internal::move(matcher)) {
CallableTraits<Callable>::CheckIsValid(callable_);
}
template <typename T>
operator Matcher<T>() const {
return Matcher<T>(new Impl<T>(callable_, matcher_));
}
private:
typedef typename CallableTraits<Callable>::StorageType CallableStorageType;
template <typename T>
class Impl : public MatcherInterface<T> {
#if GTEST_LANG_CXX11
using ResultType = decltype(CallableTraits<Callable>::template Invoke<T>(
std::declval<CallableStorageType>(), std::declval<T>()));
#else
typedef typename CallableTraits<Callable>::ResultType ResultType;
#endif
public:
template <typename M>
Impl(const CallableStorageType& callable, const M& matcher)
: callable_(callable), matcher_(MatcherCast<ResultType>(matcher)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "is mapped by the given callable to a value that ";
matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "is mapped by the given callable to a value that ";
matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(T obj, MatchResultListener* listener) const {
*listener << "which is mapped by the given callable to ";
// Cannot pass the return value directly to MatchPrintAndExplain, which
// takes a non-const reference as argument.
// Also, specifying template argument explicitly is needed because T could
// be a non-const reference (e.g. Matcher<Uncopyable&>).
ResultType result =
CallableTraits<Callable>::template Invoke<T>(callable_, obj);
return MatchPrintAndExplain(result, matcher_, listener);
}
private:
// Functors often define operator() as non-const method even though
// they are actually stateless. But we need to use them even when
// 'this' is a const pointer. It's the user's responsibility not to
// use stateful callables with ResultOf(), which doesn't guarantee
// how many times the callable will be invoked.
mutable CallableStorageType callable_;
const Matcher<ResultType> matcher_;
GTEST_DISALLOW_ASSIGN_(Impl);
}; // class Impl
const CallableStorageType callable_;
const InnerMatcher matcher_;
GTEST_DISALLOW_ASSIGN_(ResultOfMatcher);
};
// Implements a matcher that checks the size of an STL-style container.
template <typename SizeMatcher>
class SizeIsMatcher {
public:
explicit SizeIsMatcher(const SizeMatcher& size_matcher)
: size_matcher_(size_matcher) {
}
template <typename Container>
operator Matcher<Container>() const {
return MakeMatcher(new Impl<Container>(size_matcher_));
}
template <typename Container>
class Impl : public MatcherInterface<Container> {
public:
typedef internal::StlContainerView<
GTEST_REMOVE_REFERENCE_AND_CONST_(Container)> ContainerView;
typedef typename ContainerView::type::size_type SizeType;
explicit Impl(const SizeMatcher& size_matcher)
: size_matcher_(MatcherCast<SizeType>(size_matcher)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "size ";
size_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "size ";
size_matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(Container container,
MatchResultListener* listener) const {
SizeType size = container.size();
StringMatchResultListener size_listener;
const bool result = size_matcher_.MatchAndExplain(size, &size_listener);
*listener
<< "whose size " << size << (result ? " matches" : " doesn't match");
PrintIfNotEmpty(size_listener.str(), listener->stream());
return result;
}
private:
const Matcher<SizeType> size_matcher_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
private:
const SizeMatcher size_matcher_;
GTEST_DISALLOW_ASSIGN_(SizeIsMatcher);
};
// Implements a matcher that checks the begin()..end() distance of an STL-style
// container.
template <typename DistanceMatcher>
class BeginEndDistanceIsMatcher {
public:
explicit BeginEndDistanceIsMatcher(const DistanceMatcher& distance_matcher)
: distance_matcher_(distance_matcher) {}
template <typename Container>
operator Matcher<Container>() const {
return MakeMatcher(new Impl<Container>(distance_matcher_));
}
template <typename Container>
class Impl : public MatcherInterface<Container> {
public:
typedef internal::StlContainerView<
GTEST_REMOVE_REFERENCE_AND_CONST_(Container)> ContainerView;
typedef typename std::iterator_traits<
typename ContainerView::type::const_iterator>::difference_type
DistanceType;
explicit Impl(const DistanceMatcher& distance_matcher)
: distance_matcher_(MatcherCast<DistanceType>(distance_matcher)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "distance between begin() and end() ";
distance_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "distance between begin() and end() ";
distance_matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(Container container,
MatchResultListener* listener) const {
#if GTEST_HAS_STD_BEGIN_AND_END_
using std::begin;
using std::end;
DistanceType distance = std::distance(begin(container), end(container));
#else
DistanceType distance = std::distance(container.begin(), container.end());
#endif
StringMatchResultListener distance_listener;
const bool result =
distance_matcher_.MatchAndExplain(distance, &distance_listener);
*listener << "whose distance between begin() and end() " << distance
<< (result ? " matches" : " doesn't match");
PrintIfNotEmpty(distance_listener.str(), listener->stream());
return result;
}
private:
const Matcher<DistanceType> distance_matcher_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
private:
const DistanceMatcher distance_matcher_;
GTEST_DISALLOW_ASSIGN_(BeginEndDistanceIsMatcher);
};
// Implements an equality matcher for any STL-style container whose elements
// support ==. This matcher is like Eq(), but its failure explanations provide
// more detailed information that is useful when the container is used as a set.
// The failure message reports elements that are in one of the operands but not
// the other. The failure messages do not report duplicate or out-of-order
// elements in the containers (which don't properly matter to sets, but can
// occur if the containers are vectors or lists, for example).
//
// Uses the container's const_iterator, value_type, operator ==,
// begin(), and end().
template <typename Container>
class ContainerEqMatcher {
public:
typedef internal::StlContainerView<Container> View;
typedef typename View::type StlContainer;
typedef typename View::const_reference StlContainerReference;
// We make a copy of expected in case the elements in it are modified
// after this matcher is created.
explicit ContainerEqMatcher(const Container& expected)
: expected_(View::Copy(expected)) {
// Makes sure the user doesn't instantiate this class template
// with a const or reference type.
(void)testing::StaticAssertTypeEq<Container,
GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>();
}
void DescribeTo(::std::ostream* os) const {
*os << "equals ";
UniversalPrint(expected_, os);
}
void DescribeNegationTo(::std::ostream* os) const {
*os << "does not equal ";
UniversalPrint(expected_, os);
}
template <typename LhsContainer>
bool MatchAndExplain(const LhsContainer& lhs,
MatchResultListener* listener) const {
// GTEST_REMOVE_CONST_() is needed to work around an MSVC 8.0 bug
// that causes LhsContainer to be a const type sometimes.
typedef internal::StlContainerView<GTEST_REMOVE_CONST_(LhsContainer)>
LhsView;
typedef typename LhsView::type LhsStlContainer;
StlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
if (lhs_stl_container == expected_)
return true;
::std::ostream* const os = listener->stream();
if (os != NULL) {
// Something is different. Check for extra values first.
bool printed_header = false;
for (typename LhsStlContainer::const_iterator it =
lhs_stl_container.begin();
it != lhs_stl_container.end(); ++it) {
if (internal::ArrayAwareFind(expected_.begin(), expected_.end(), *it) ==
expected_.end()) {
if (printed_header) {
*os << ", ";
} else {
*os << "which has these unexpected elements: ";
printed_header = true;
}
UniversalPrint(*it, os);
}
}
// Now check for missing values.
bool printed_header2 = false;
for (typename StlContainer::const_iterator it = expected_.begin();
it != expected_.end(); ++it) {
if (internal::ArrayAwareFind(
lhs_stl_container.begin(), lhs_stl_container.end(), *it) ==
lhs_stl_container.end()) {
if (printed_header2) {
*os << ", ";
} else {
*os << (printed_header ? ",\nand" : "which")
<< " doesn't have these expected elements: ";
printed_header2 = true;
}
UniversalPrint(*it, os);
}
}
}
return false;
}
private:
const StlContainer expected_;
GTEST_DISALLOW_ASSIGN_(ContainerEqMatcher);
};
// A comparator functor that uses the < operator to compare two values.
struct LessComparator {
template <typename T, typename U>
bool operator()(const T& lhs, const U& rhs) const { return lhs < rhs; }
};
// Implements WhenSortedBy(comparator, container_matcher).
template <typename Comparator, typename ContainerMatcher>
class WhenSortedByMatcher {
public:
WhenSortedByMatcher(const Comparator& comparator,
const ContainerMatcher& matcher)
: comparator_(comparator), matcher_(matcher) {}
template <typename LhsContainer>
operator Matcher<LhsContainer>() const {
return MakeMatcher(new Impl<LhsContainer>(comparator_, matcher_));
}
template <typename LhsContainer>
class Impl : public MatcherInterface<LhsContainer> {
public:
typedef internal::StlContainerView<
GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
typedef typename LhsView::type LhsStlContainer;
typedef typename LhsView::const_reference LhsStlContainerReference;
// Transforms std::pair<const Key, Value> into std::pair<Key, Value>
// so that we can match associative containers.
typedef typename RemoveConstFromKey<
typename LhsStlContainer::value_type>::type LhsValue;
Impl(const Comparator& comparator, const ContainerMatcher& matcher)
: comparator_(comparator), matcher_(matcher) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "(when sorted) ";
matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "(when sorted) ";
matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(LhsContainer lhs,
MatchResultListener* listener) const {
LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
::std::vector<LhsValue> sorted_container(lhs_stl_container.begin(),
lhs_stl_container.end());
::std::sort(
sorted_container.begin(), sorted_container.end(), comparator_);
if (!listener->IsInterested()) {
// If the listener is not interested, we do not need to
// construct the inner explanation.
return matcher_.Matches(sorted_container);
}
*listener << "which is ";
UniversalPrint(sorted_container, listener->stream());
*listener << " when sorted";
StringMatchResultListener inner_listener;
const bool match = matcher_.MatchAndExplain(sorted_container,
&inner_listener);
PrintIfNotEmpty(inner_listener.str(), listener->stream());
return match;
}
private:
const Comparator comparator_;
const Matcher<const ::std::vector<LhsValue>&> matcher_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
};
private:
const Comparator comparator_;
const ContainerMatcher matcher_;
GTEST_DISALLOW_ASSIGN_(WhenSortedByMatcher);
};
// Implements Pointwise(tuple_matcher, rhs_container). tuple_matcher
// must be able to be safely cast to Matcher<tuple<const T1&, const
// T2&> >, where T1 and T2 are the types of elements in the LHS
// container and the RHS container respectively.
template <typename TupleMatcher, typename RhsContainer>
class PointwiseMatcher {
GTEST_COMPILE_ASSERT_(
!IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(RhsContainer)>::value,
use_UnorderedPointwise_with_hash_tables);
public:
typedef internal::StlContainerView<RhsContainer> RhsView;
typedef typename RhsView::type RhsStlContainer;
typedef typename RhsStlContainer::value_type RhsValue;
// Like ContainerEq, we make a copy of rhs in case the elements in
// it are modified after this matcher is created.
PointwiseMatcher(const TupleMatcher& tuple_matcher, const RhsContainer& rhs)
: tuple_matcher_(tuple_matcher), rhs_(RhsView::Copy(rhs)) {
// Makes sure the user doesn't instantiate this class template
// with a const or reference type.
(void)testing::StaticAssertTypeEq<RhsContainer,
GTEST_REMOVE_REFERENCE_AND_CONST_(RhsContainer)>();
}
template <typename LhsContainer>
operator Matcher<LhsContainer>() const {
GTEST_COMPILE_ASSERT_(
!IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)>::value,
use_UnorderedPointwise_with_hash_tables);
return MakeMatcher(new Impl<LhsContainer>(tuple_matcher_, rhs_));
}
template <typename LhsContainer>
class Impl : public MatcherInterface<LhsContainer> {
public:
typedef internal::StlContainerView<
GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
typedef typename LhsView::type LhsStlContainer;
typedef typename LhsView::const_reference LhsStlContainerReference;
typedef typename LhsStlContainer::value_type LhsValue;
// We pass the LHS value and the RHS value to the inner matcher by
// reference, as they may be expensive to copy. We must use tuple
// instead of pair here, as a pair cannot hold references (C++ 98,
// 20.2.2 [lib.pairs]).
typedef ::testing::tuple<const LhsValue&, const RhsValue&> InnerMatcherArg;
Impl(const TupleMatcher& tuple_matcher, const RhsStlContainer& rhs)
// mono_tuple_matcher_ holds a monomorphic version of the tuple matcher.
: mono_tuple_matcher_(SafeMatcherCast<InnerMatcherArg>(tuple_matcher)),
rhs_(rhs) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "contains " << rhs_.size()
<< " values, where each value and its corresponding value in ";
UniversalPrinter<RhsStlContainer>::Print(rhs_, os);
*os << " ";
mono_tuple_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't contain exactly " << rhs_.size()
<< " values, or contains a value x at some index i"
<< " where x and the i-th value of ";
UniversalPrint(rhs_, os);
*os << " ";
mono_tuple_matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(LhsContainer lhs,
MatchResultListener* listener) const {
LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
const size_t actual_size = lhs_stl_container.size();
if (actual_size != rhs_.size()) {
*listener << "which contains " << actual_size << " values";
return false;
}
typename LhsStlContainer::const_iterator left = lhs_stl_container.begin();
typename RhsStlContainer::const_iterator right = rhs_.begin();
for (size_t i = 0; i != actual_size; ++i, ++left, ++right) {
if (listener->IsInterested()) {
StringMatchResultListener inner_listener;
// Create InnerMatcherArg as a temporarily object to avoid it outlives
// *left and *right. Dereference or the conversion to `const T&` may
// return temp objects, e.g for vector<bool>.
if (!mono_tuple_matcher_.MatchAndExplain(
InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
ImplicitCast_<const RhsValue&>(*right)),
&inner_listener)) {
*listener << "where the value pair (";
UniversalPrint(*left, listener->stream());
*listener << ", ";
UniversalPrint(*right, listener->stream());
*listener << ") at index #" << i << " don't match";
PrintIfNotEmpty(inner_listener.str(), listener->stream());
return false;
}
} else {
if (!mono_tuple_matcher_.Matches(
InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
ImplicitCast_<const RhsValue&>(*right))))
return false;
}
}
return true;
}
private:
const Matcher<InnerMatcherArg> mono_tuple_matcher_;
const RhsStlContainer rhs_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
private:
const TupleMatcher tuple_matcher_;
const RhsStlContainer rhs_;
GTEST_DISALLOW_ASSIGN_(PointwiseMatcher);
};
// Holds the logic common to ContainsMatcherImpl and EachMatcherImpl.
template <typename Container>
class QuantifierMatcherImpl : public MatcherInterface<Container> {
public:
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
typedef StlContainerView<RawContainer> View;
typedef typename View::type StlContainer;
typedef typename View::const_reference StlContainerReference;
typedef typename StlContainer::value_type Element;
template <typename InnerMatcher>
explicit QuantifierMatcherImpl(InnerMatcher inner_matcher)
: inner_matcher_(
testing::SafeMatcherCast<const Element&>(inner_matcher)) {}
// Checks whether:
// * All elements in the container match, if all_elements_should_match.
// * Any element in the container matches, if !all_elements_should_match.
bool MatchAndExplainImpl(bool all_elements_should_match,
Container container,
MatchResultListener* listener) const {
StlContainerReference stl_container = View::ConstReference(container);
size_t i = 0;
for (typename StlContainer::const_iterator it = stl_container.begin();
it != stl_container.end(); ++it, ++i) {
StringMatchResultListener inner_listener;
const bool matches = inner_matcher_.MatchAndExplain(*it, &inner_listener);
if (matches != all_elements_should_match) {
*listener << "whose element #" << i
<< (matches ? " matches" : " doesn't match");
PrintIfNotEmpty(inner_listener.str(), listener->stream());
return !all_elements_should_match;
}
}
return all_elements_should_match;
}
protected:
const Matcher<const Element&> inner_matcher_;
GTEST_DISALLOW_ASSIGN_(QuantifierMatcherImpl);
};
// Implements Contains(element_matcher) for the given argument type Container.
// Symmetric to EachMatcherImpl.
template <typename Container>
class ContainsMatcherImpl : public QuantifierMatcherImpl<Container> {
public:
template <typename InnerMatcher>
explicit ContainsMatcherImpl(InnerMatcher inner_matcher)
: QuantifierMatcherImpl<Container>(inner_matcher) {}
// Describes what this matcher does.
virtual void DescribeTo(::std::ostream* os) const {
*os << "contains at least one element that ";
this->inner_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't contain any element that ";
this->inner_matcher_.DescribeTo(os);
}
virtual bool MatchAndExplain(Container container,
MatchResultListener* listener) const {
return this->MatchAndExplainImpl(false, container, listener);
}
private:
GTEST_DISALLOW_ASSIGN_(ContainsMatcherImpl);
};
// Implements Each(element_matcher) for the given argument type Container.
// Symmetric to ContainsMatcherImpl.
template <typename Container>
class EachMatcherImpl : public QuantifierMatcherImpl<Container> {
public:
template <typename InnerMatcher>
explicit EachMatcherImpl(InnerMatcher inner_matcher)
: QuantifierMatcherImpl<Container>(inner_matcher) {}
// Describes what this matcher does.
virtual void DescribeTo(::std::ostream* os) const {
*os << "only contains elements that ";
this->inner_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "contains some element that ";
this->inner_matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(Container container,
MatchResultListener* listener) const {
return this->MatchAndExplainImpl(true, container, listener);
}
private:
GTEST_DISALLOW_ASSIGN_(EachMatcherImpl);
};
// Implements polymorphic Contains(element_matcher).
template <typename M>
class ContainsMatcher {
public:
explicit ContainsMatcher(M m) : inner_matcher_(m) {}
template <typename Container>
operator Matcher<Container>() const {
return MakeMatcher(new ContainsMatcherImpl<Container>(inner_matcher_));
}
private:
const M inner_matcher_;
GTEST_DISALLOW_ASSIGN_(ContainsMatcher);
};
// Implements polymorphic Each(element_matcher).
template <typename M>
class EachMatcher {
public:
explicit EachMatcher(M m) : inner_matcher_(m) {}
template <typename Container>
operator Matcher<Container>() const {
return MakeMatcher(new EachMatcherImpl<Container>(inner_matcher_));
}
private:
const M inner_matcher_;
GTEST_DISALLOW_ASSIGN_(EachMatcher);
};
struct Rank1 {};
struct Rank0 : Rank1 {};
namespace pair_getters {
#if GTEST_LANG_CXX11
using std::get;
template <typename T>
auto First(T& x, Rank1) -> decltype(get<0>(x)) { // NOLINT
return get<0>(x);
}
template <typename T>
auto First(T& x, Rank0) -> decltype((x.first)) { // NOLINT
return x.first;
}
template <typename T>
auto Second(T& x, Rank1) -> decltype(get<1>(x)) { // NOLINT
return get<1>(x);
}
template <typename T>
auto Second(T& x, Rank0) -> decltype((x.second)) { // NOLINT
return x.second;
}
#else
template <typename T>
typename T::first_type& First(T& x, Rank0) { // NOLINT
return x.first;
}
template <typename T>
const typename T::first_type& First(const T& x, Rank0) {
return x.first;
}
template <typename T>
typename T::second_type& Second(T& x, Rank0) { // NOLINT
return x.second;
}
template <typename T>
const typename T::second_type& Second(const T& x, Rank0) {
return x.second;
}
#endif // GTEST_LANG_CXX11
} // namespace pair_getters
// Implements Key(inner_matcher) for the given argument pair type.
// Key(inner_matcher) matches an std::pair whose 'first' field matches
// inner_matcher. For example, Contains(Key(Ge(5))) can be used to match an
// std::map that contains at least one element whose key is >= 5.
template <typename PairType>
class KeyMatcherImpl : public MatcherInterface<PairType> {
public:
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
typedef typename RawPairType::first_type KeyType;
template <typename InnerMatcher>
explicit KeyMatcherImpl(InnerMatcher inner_matcher)
: inner_matcher_(
testing::SafeMatcherCast<const KeyType&>(inner_matcher)) {
}
// Returns true iff 'key_value.first' (the key) matches the inner matcher.
virtual bool MatchAndExplain(PairType key_value,
MatchResultListener* listener) const {
StringMatchResultListener inner_listener;
const bool match = inner_matcher_.MatchAndExplain(
pair_getters::First(key_value, Rank0()), &inner_listener);
const std::string explanation = inner_listener.str();
if (explanation != "") {
*listener << "whose first field is a value " << explanation;
}
return match;
}
// Describes what this matcher does.
virtual void DescribeTo(::std::ostream* os) const {
*os << "has a key that ";
inner_matcher_.DescribeTo(os);
}
// Describes what the negation of this matcher does.
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "doesn't have a key that ";
inner_matcher_.DescribeTo(os);
}
private:
const Matcher<const KeyType&> inner_matcher_;
GTEST_DISALLOW_ASSIGN_(KeyMatcherImpl);
};
// Implements polymorphic Key(matcher_for_key).
template <typename M>
class KeyMatcher {
public:
explicit KeyMatcher(M m) : matcher_for_key_(m) {}
template <typename PairType>
operator Matcher<PairType>() const {
return MakeMatcher(new KeyMatcherImpl<PairType>(matcher_for_key_));
}
private:
const M matcher_for_key_;
GTEST_DISALLOW_ASSIGN_(KeyMatcher);
};
// Implements Pair(first_matcher, second_matcher) for the given argument pair
// type with its two matchers. See Pair() function below.
template <typename PairType>
class PairMatcherImpl : public MatcherInterface<PairType> {
public:
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
typedef typename RawPairType::first_type FirstType;
typedef typename RawPairType::second_type SecondType;
template <typename FirstMatcher, typename SecondMatcher>
PairMatcherImpl(FirstMatcher first_matcher, SecondMatcher second_matcher)
: first_matcher_(
testing::SafeMatcherCast<const FirstType&>(first_matcher)),
second_matcher_(
testing::SafeMatcherCast<const SecondType&>(second_matcher)) {
}
// Describes what this matcher does.
virtual void DescribeTo(::std::ostream* os) const {
*os << "has a first field that ";
first_matcher_.DescribeTo(os);
*os << ", and has a second field that ";
second_matcher_.DescribeTo(os);
}
// Describes what the negation of this matcher does.
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "has a first field that ";
first_matcher_.DescribeNegationTo(os);
*os << ", or has a second field that ";
second_matcher_.DescribeNegationTo(os);
}
// Returns true iff 'a_pair.first' matches first_matcher and 'a_pair.second'
// matches second_matcher.
virtual bool MatchAndExplain(PairType a_pair,
MatchResultListener* listener) const {
if (!listener->IsInterested()) {
// If the listener is not interested, we don't need to construct the
// explanation.
return first_matcher_.Matches(pair_getters::First(a_pair, Rank0())) &&
second_matcher_.Matches(pair_getters::Second(a_pair, Rank0()));
}
StringMatchResultListener first_inner_listener;
if (!first_matcher_.MatchAndExplain(pair_getters::First(a_pair, Rank0()),
&first_inner_listener)) {
*listener << "whose first field does not match";
PrintIfNotEmpty(first_inner_listener.str(), listener->stream());
return false;
}
StringMatchResultListener second_inner_listener;
if (!second_matcher_.MatchAndExplain(pair_getters::Second(a_pair, Rank0()),
&second_inner_listener)) {
*listener << "whose second field does not match";
PrintIfNotEmpty(second_inner_listener.str(), listener->stream());
return false;
}
ExplainSuccess(first_inner_listener.str(), second_inner_listener.str(),
listener);
return true;
}
private:
void ExplainSuccess(const std::string& first_explanation,
const std::string& second_explanation,
MatchResultListener* listener) const {
*listener << "whose both fields match";
if (first_explanation != "") {
*listener << ", where the first field is a value " << first_explanation;
}
if (second_explanation != "") {
*listener << ", ";
if (first_explanation != "") {
*listener << "and ";
} else {
*listener << "where ";
}
*listener << "the second field is a value " << second_explanation;
}
}
const Matcher<const FirstType&> first_matcher_;
const Matcher<const SecondType&> second_matcher_;
GTEST_DISALLOW_ASSIGN_(PairMatcherImpl);
};
// Implements polymorphic Pair(first_matcher, second_matcher).
template <typename FirstMatcher, typename SecondMatcher>
class PairMatcher {
public:
PairMatcher(FirstMatcher first_matcher, SecondMatcher second_matcher)
: first_matcher_(first_matcher), second_matcher_(second_matcher) {}
template <typename PairType>
operator Matcher<PairType> () const {
return MakeMatcher(
new PairMatcherImpl<PairType>(
first_matcher_, second_matcher_));
}
private:
const FirstMatcher first_matcher_;
const SecondMatcher second_matcher_;
GTEST_DISALLOW_ASSIGN_(PairMatcher);
};
// Implements ElementsAre() and ElementsAreArray().
template <typename Container>
class ElementsAreMatcherImpl : public MatcherInterface<Container> {
public:
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
typedef internal::StlContainerView<RawContainer> View;
typedef typename View::type StlContainer;
typedef typename View::const_reference StlContainerReference;
typedef typename StlContainer::value_type Element;
// Constructs the matcher from a sequence of element values or
// element matchers.
template <typename InputIter>
ElementsAreMatcherImpl(InputIter first, InputIter last) {
while (first != last) {
matchers_.push_back(MatcherCast<const Element&>(*first++));
}
}
// Describes what this matcher does.
virtual void DescribeTo(::std::ostream* os) const {
if (count() == 0) {
*os << "is empty";
} else if (count() == 1) {
*os << "has 1 element that ";
matchers_[0].DescribeTo(os);
} else {
*os << "has " << Elements(count()) << " where\n";
for (size_t i = 0; i != count(); ++i) {
*os << "element #" << i << " ";
matchers_[i].DescribeTo(os);
if (i + 1 < count()) {
*os << ",\n";
}
}
}
}
// Describes what the negation of this matcher does.
virtual void DescribeNegationTo(::std::ostream* os) const {
if (count() == 0) {
*os << "isn't empty";
return;
}
*os << "doesn't have " << Elements(count()) << ", or\n";
for (size_t i = 0; i != count(); ++i) {
*os << "element #" << i << " ";
matchers_[i].DescribeNegationTo(os);
if (i + 1 < count()) {
*os << ", or\n";
}
}
}
virtual bool MatchAndExplain(Container container,
MatchResultListener* listener) const {
// To work with stream-like "containers", we must only walk
// through the elements in one pass.
const bool listener_interested = listener->IsInterested();
// explanations[i] is the explanation of the element at index i.
::std::vector<std::string> explanations(count());
StlContainerReference stl_container = View::ConstReference(container);
typename StlContainer::const_iterator it = stl_container.begin();
size_t exam_pos = 0;
bool mismatch_found = false; // Have we found a mismatched element yet?
// Go through the elements and matchers in pairs, until we reach
// the end of either the elements or the matchers, or until we find a
// mismatch.
for (; it != stl_container.end() && exam_pos != count(); ++it, ++exam_pos) {
bool match; // Does the current element match the current matcher?
if (listener_interested) {
StringMatchResultListener s;
match = matchers_[exam_pos].MatchAndExplain(*it, &s);
explanations[exam_pos] = s.str();
} else {
match = matchers_[exam_pos].Matches(*it);
}
if (!match) {
mismatch_found = true;
break;
}
}
// If mismatch_found is true, 'exam_pos' is the index of the mismatch.
// Find how many elements the actual container has. We avoid
// calling size() s.t. this code works for stream-like "containers"
// that don't define size().
size_t actual_count = exam_pos;
for (; it != stl_container.end(); ++it) {
++actual_count;
}
if (actual_count != count()) {
// The element count doesn't match. If the container is empty,
// there's no need to explain anything as Google Mock already
// prints the empty container. Otherwise we just need to show
// how many elements there actually are.
if (listener_interested && (actual_count != 0)) {
*listener << "which has " << Elements(actual_count);
}
return false;
}
if (mismatch_found) {
// The element count matches, but the exam_pos-th element doesn't match.
if (listener_interested) {
*listener << "whose element #" << exam_pos << " doesn't match";
PrintIfNotEmpty(explanations[exam_pos], listener->stream());
}
return false;
}
// Every element matches its expectation. We need to explain why
// (the obvious ones can be skipped).
if (listener_interested) {
bool reason_printed = false;
for (size_t i = 0; i != count(); ++i) {
const std::string& s = explanations[i];
if (!s.empty()) {
if (reason_printed) {
*listener << ",\nand ";
}
*listener << "whose element #" << i << " matches, " << s;
reason_printed = true;
}
}
}
return true;
}
private:
static Message Elements(size_t count) {
return Message() << count << (count == 1 ? " element" : " elements");
}
size_t count() const { return matchers_.size(); }
::std::vector<Matcher<const Element&> > matchers_;
GTEST_DISALLOW_ASSIGN_(ElementsAreMatcherImpl);
};
// Connectivity matrix of (elements X matchers), in element-major order.
// Initially, there are no edges.
// Use NextGraph() to iterate over all possible edge configurations.
// Use Randomize() to generate a random edge configuration.
class GTEST_API_ MatchMatrix {
public:
MatchMatrix(size_t num_elements, size_t num_matchers)
: num_elements_(num_elements),
num_matchers_(num_matchers),
matched_(num_elements_* num_matchers_, 0) {
}
size_t LhsSize() const { return num_elements_; }
size_t RhsSize() const { return num_matchers_; }
bool HasEdge(size_t ilhs, size_t irhs) const {
return matched_[SpaceIndex(ilhs, irhs)] == 1;
}
void SetEdge(size_t ilhs, size_t irhs, bool b) {
matched_[SpaceIndex(ilhs, irhs)] = b ? 1 : 0;
}
// Treating the connectivity matrix as a (LhsSize()*RhsSize())-bit number,
// adds 1 to that number; returns false if incrementing the graph left it
// empty.
bool NextGraph();
void Randomize();
std::string DebugString() const;
private:
size_t SpaceIndex(size_t ilhs, size_t irhs) const {
return ilhs * num_matchers_ + irhs;
}
size_t num_elements_;
size_t num_matchers_;
// Each element is a char interpreted as bool. They are stored as a
// flattened array in lhs-major order, use 'SpaceIndex()' to translate
// a (ilhs, irhs) matrix coordinate into an offset.
::std::vector<char> matched_;
};
typedef ::std::pair<size_t, size_t> ElementMatcherPair;
typedef ::std::vector<ElementMatcherPair> ElementMatcherPairs;
// Returns a maximum bipartite matching for the specified graph 'g'.
// The matching is represented as a vector of {element, matcher} pairs.
GTEST_API_ ElementMatcherPairs
FindMaxBipartiteMatching(const MatchMatrix& g);
struct UnorderedMatcherRequire {
enum Flags {
Superset = 1 << 0,
Subset = 1 << 1,
ExactMatch = Superset | Subset,
};
};
// Untyped base class for implementing UnorderedElementsAre. By
// putting logic that's not specific to the element type here, we
// reduce binary bloat and increase compilation speed.
class GTEST_API_ UnorderedElementsAreMatcherImplBase {
protected:
explicit UnorderedElementsAreMatcherImplBase(
UnorderedMatcherRequire::Flags matcher_flags)
: match_flags_(matcher_flags) {}
// A vector of matcher describers, one for each element matcher.
// Does not own the describers (and thus can be used only when the
// element matchers are alive).
typedef ::std::vector<const MatcherDescriberInterface*> MatcherDescriberVec;
// Describes this UnorderedElementsAre matcher.
void DescribeToImpl(::std::ostream* os) const;
// Describes the negation of this UnorderedElementsAre matcher.
void DescribeNegationToImpl(::std::ostream* os) const;
bool VerifyMatchMatrix(const ::std::vector<std::string>& element_printouts,
const MatchMatrix& matrix,
MatchResultListener* listener) const;
bool FindPairing(const MatchMatrix& matrix,
MatchResultListener* listener) const;
MatcherDescriberVec& matcher_describers() {
return matcher_describers_;
}
static Message Elements(size_t n) {
return Message() << n << " element" << (n == 1 ? "" : "s");
}
UnorderedMatcherRequire::Flags match_flags() const { return match_flags_; }
private:
UnorderedMatcherRequire::Flags match_flags_;
MatcherDescriberVec matcher_describers_;
GTEST_DISALLOW_ASSIGN_(UnorderedElementsAreMatcherImplBase);
};
// Implements UnorderedElementsAre, UnorderedElementsAreArray, IsSubsetOf, and
// IsSupersetOf.
template <typename Container>
class UnorderedElementsAreMatcherImpl
: public MatcherInterface<Container>,
public UnorderedElementsAreMatcherImplBase {
public:
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
typedef internal::StlContainerView<RawContainer> View;
typedef typename View::type StlContainer;
typedef typename View::const_reference StlContainerReference;
typedef typename StlContainer::const_iterator StlContainerConstIterator;
typedef typename StlContainer::value_type Element;
template <typename InputIter>
UnorderedElementsAreMatcherImpl(UnorderedMatcherRequire::Flags matcher_flags,
InputIter first, InputIter last)
: UnorderedElementsAreMatcherImplBase(matcher_flags) {
for (; first != last; ++first) {
matchers_.push_back(MatcherCast<const Element&>(*first));
matcher_describers().push_back(matchers_.back().GetDescriber());
}
}
// Describes what this matcher does.
virtual void DescribeTo(::std::ostream* os) const {
return UnorderedElementsAreMatcherImplBase::DescribeToImpl(os);
}
// Describes what the negation of this matcher does.
virtual void DescribeNegationTo(::std::ostream* os) const {
return UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(os);
}
virtual bool MatchAndExplain(Container container,
MatchResultListener* listener) const {
StlContainerReference stl_container = View::ConstReference(container);
::std::vector<std::string> element_printouts;
MatchMatrix matrix =
AnalyzeElements(stl_container.begin(), stl_container.end(),
&element_printouts, listener);
if (matrix.LhsSize() == 0 && matrix.RhsSize() == 0) {
return true;
}
if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
if (matrix.LhsSize() != matrix.RhsSize()) {
// The element count doesn't match. If the container is empty,
// there's no need to explain anything as Google Mock already
// prints the empty container. Otherwise we just need to show
// how many elements there actually are.
if (matrix.LhsSize() != 0 && listener->IsInterested()) {
*listener << "which has " << Elements(matrix.LhsSize());
}
return false;
}
}
return VerifyMatchMatrix(element_printouts, matrix, listener) &&
FindPairing(matrix, listener);
}
private:
template <typename ElementIter>
MatchMatrix AnalyzeElements(ElementIter elem_first, ElementIter elem_last,
::std::vector<std::string>* element_printouts,
MatchResultListener* listener) const {
element_printouts->clear();
::std::vector<char> did_match;
size_t num_elements = 0;
for (; elem_first != elem_last; ++num_elements, ++elem_first) {
if (listener->IsInterested()) {
element_printouts->push_back(PrintToString(*elem_first));
}
for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
did_match.push_back(Matches(matchers_[irhs])(*elem_first));
}
}
MatchMatrix matrix(num_elements, matchers_.size());
::std::vector<char>::const_iterator did_match_iter = did_match.begin();
for (size_t ilhs = 0; ilhs != num_elements; ++ilhs) {
for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
matrix.SetEdge(ilhs, irhs, *did_match_iter++ != 0);
}
}
return matrix;
}
::std::vector<Matcher<const Element&> > matchers_;
GTEST_DISALLOW_ASSIGN_(UnorderedElementsAreMatcherImpl);
};
// Functor for use in TransformTuple.
// Performs MatcherCast<Target> on an input argument of any type.
template <typename Target>
struct CastAndAppendTransform {
template <typename Arg>
Matcher<Target> operator()(const Arg& a) const {
return MatcherCast<Target>(a);
}
};
// Implements UnorderedElementsAre.
template <typename MatcherTuple>
class UnorderedElementsAreMatcher {
public:
explicit UnorderedElementsAreMatcher(const MatcherTuple& args)
: matchers_(args) {}
template <typename Container>
operator Matcher<Container>() const {
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
typedef typename internal::StlContainerView<RawContainer>::type View;
typedef typename View::value_type Element;
typedef ::std::vector<Matcher<const Element&> > MatcherVec;
MatcherVec matchers;
matchers.reserve(::testing::tuple_size<MatcherTuple>::value);
TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
::std::back_inserter(matchers));
return MakeMatcher(new UnorderedElementsAreMatcherImpl<Container>(
UnorderedMatcherRequire::ExactMatch, matchers.begin(), matchers.end()));
}
private:
const MatcherTuple matchers_;
GTEST_DISALLOW_ASSIGN_(UnorderedElementsAreMatcher);
};
// Implements ElementsAre.
template <typename MatcherTuple>
class ElementsAreMatcher {
public:
explicit ElementsAreMatcher(const MatcherTuple& args) : matchers_(args) {}
template <typename Container>
operator Matcher<Container>() const {
GTEST_COMPILE_ASSERT_(
!IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value ||
::testing::tuple_size<MatcherTuple>::value < 2,
use_UnorderedElementsAre_with_hash_tables);
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
typedef typename internal::StlContainerView<RawContainer>::type View;
typedef typename View::value_type Element;
typedef ::std::vector<Matcher<const Element&> > MatcherVec;
MatcherVec matchers;
matchers.reserve(::testing::tuple_size<MatcherTuple>::value);
TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
::std::back_inserter(matchers));
return MakeMatcher(new ElementsAreMatcherImpl<Container>(
matchers.begin(), matchers.end()));
}
private:
const MatcherTuple matchers_;
GTEST_DISALLOW_ASSIGN_(ElementsAreMatcher);
};
// Implements UnorderedElementsAreArray(), IsSubsetOf(), and IsSupersetOf().
template <typename T>
class UnorderedElementsAreArrayMatcher {
public:
template <typename Iter>
UnorderedElementsAreArrayMatcher(UnorderedMatcherRequire::Flags match_flags,
Iter first, Iter last)
: match_flags_(match_flags), matchers_(first, last) {}
template <typename Container>
operator Matcher<Container>() const {
return MakeMatcher(new UnorderedElementsAreMatcherImpl<Container>(
match_flags_, matchers_.begin(), matchers_.end()));
}
private:
UnorderedMatcherRequire::Flags match_flags_;
::std::vector<T> matchers_;
GTEST_DISALLOW_ASSIGN_(UnorderedElementsAreArrayMatcher);
};
// Implements ElementsAreArray().
template <typename T>
class ElementsAreArrayMatcher {
public:
template <typename Iter>
ElementsAreArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
template <typename Container>
operator Matcher<Container>() const {
GTEST_COMPILE_ASSERT_(
!IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value,
use_UnorderedElementsAreArray_with_hash_tables);
return MakeMatcher(new ElementsAreMatcherImpl<Container>(
matchers_.begin(), matchers_.end()));
}
private:
const ::std::vector<T> matchers_;
GTEST_DISALLOW_ASSIGN_(ElementsAreArrayMatcher);
};
// Given a 2-tuple matcher tm of type Tuple2Matcher and a value second
// of type Second, BoundSecondMatcher<Tuple2Matcher, Second>(tm,
// second) is a polymorphic matcher that matches a value x iff tm
// matches tuple (x, second). Useful for implementing
// UnorderedPointwise() in terms of UnorderedElementsAreArray().
//
// BoundSecondMatcher is copyable and assignable, as we need to put
// instances of this class in a vector when implementing
// UnorderedPointwise().
template <typename Tuple2Matcher, typename Second>
class BoundSecondMatcher {
public:
BoundSecondMatcher(const Tuple2Matcher& tm, const Second& second)
: tuple2_matcher_(tm), second_value_(second) {}
template <typename T>
operator Matcher<T>() const {
return MakeMatcher(new Impl<T>(tuple2_matcher_, second_value_));
}
// We have to define this for UnorderedPointwise() to compile in
// C++98 mode, as it puts BoundSecondMatcher instances in a vector,
// which requires the elements to be assignable in C++98. The
// compiler cannot generate the operator= for us, as Tuple2Matcher
// and Second may not be assignable.
//
// However, this should never be called, so the implementation just
// need to assert.
void operator=(const BoundSecondMatcher& /*rhs*/) {
GTEST_LOG_(FATAL) << "BoundSecondMatcher should never be assigned.";
}
private:
template <typename T>
class Impl : public MatcherInterface<T> {
public:
typedef ::testing::tuple<T, Second> ArgTuple;
Impl(const Tuple2Matcher& tm, const Second& second)
: mono_tuple2_matcher_(SafeMatcherCast<const ArgTuple&>(tm)),
second_value_(second) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "and ";
UniversalPrint(second_value_, os);
*os << " ";
mono_tuple2_matcher_.DescribeTo(os);
}
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
return mono_tuple2_matcher_.MatchAndExplain(ArgTuple(x, second_value_),
listener);
}
private:
const Matcher<const ArgTuple&> mono_tuple2_matcher_;
const Second second_value_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
const Tuple2Matcher tuple2_matcher_;
const Second second_value_;
};
// Given a 2-tuple matcher tm and a value second,
// MatcherBindSecond(tm, second) returns a matcher that matches a
// value x iff tm matches tuple (x, second). Useful for implementing
// UnorderedPointwise() in terms of UnorderedElementsAreArray().
template <typename Tuple2Matcher, typename Second>
BoundSecondMatcher<Tuple2Matcher, Second> MatcherBindSecond(
const Tuple2Matcher& tm, const Second& second) {
return BoundSecondMatcher<Tuple2Matcher, Second>(tm, second);
}
// Returns the description for a matcher defined using the MATCHER*()
// macro where the user-supplied description string is "", if
// 'negation' is false; otherwise returns the description of the
// negation of the matcher. 'param_values' contains a list of strings
// that are the print-out of the matcher's parameters.
GTEST_API_ std::string FormatMatcherDescription(bool negation,
const char* matcher_name,
const Strings& param_values);
// Implements a matcher that checks the value of a optional<> type variable.
template <typename ValueMatcher>
class OptionalMatcher {
public:
explicit OptionalMatcher(const ValueMatcher& value_matcher)
: value_matcher_(value_matcher) {}
template <typename Optional>
operator Matcher<Optional>() const {
return MakeMatcher(new Impl<Optional>(value_matcher_));
}
template <typename Optional>
class Impl : public MatcherInterface<Optional> {
public:
typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Optional) OptionalView;
typedef typename OptionalView::value_type ValueType;
explicit Impl(const ValueMatcher& value_matcher)
: value_matcher_(MatcherCast<ValueType>(value_matcher)) {}
virtual void DescribeTo(::std::ostream* os) const {
*os << "value ";
value_matcher_.DescribeTo(os);
}
virtual void DescribeNegationTo(::std::ostream* os) const {
*os << "value ";
value_matcher_.DescribeNegationTo(os);
}
virtual bool MatchAndExplain(Optional optional,
MatchResultListener* listener) const {
if (!optional) {
*listener << "which is not engaged";
return false;
}
const ValueType& value = *optional;
StringMatchResultListener value_listener;
const bool match = value_matcher_.MatchAndExplain(value, &value_listener);
*listener << "whose value " << PrintToString(value)
<< (match ? " matches" : " doesn't match");
PrintIfNotEmpty(value_listener.str(), listener->stream());
return match;
}
private:
const Matcher<ValueType> value_matcher_;
GTEST_DISALLOW_ASSIGN_(Impl);
};
private:
const ValueMatcher value_matcher_;
GTEST_DISALLOW_ASSIGN_(OptionalMatcher);
};
namespace variant_matcher {
// Overloads to allow VariantMatcher to do proper ADL lookup.
template <typename T>
void holds_alternative() {}
template <typename T>
void get() {}
// Implements a matcher that checks the value of a variant<> type variable.
template <typename T>
class VariantMatcher {
public:
explicit VariantMatcher(::testing::Matcher<const T&> matcher)
: matcher_(internal::move(matcher)) {}
template <typename Variant>
bool MatchAndExplain(const Variant& value,
::testing::MatchResultListener* listener) const {
if (!listener->IsInterested()) {
return holds_alternative<T>(value) && matcher_.Matches(get<T>(value));
}
if (!holds_alternative<T>(value)) {
*listener << "whose value is not of type '" << GetTypeName() << "'";
return false;
}
const T& elem = get<T>(value);
StringMatchResultListener elem_listener;
const bool match = matcher_.MatchAndExplain(elem, &elem_listener);
*listener << "whose value " << PrintToString(elem)
<< (match ? " matches" : " doesn't match");
PrintIfNotEmpty(elem_listener.str(), listener->stream());
return match;
}
void DescribeTo(std::ostream* os) const {
*os << "is a variant<> with value of type '" << GetTypeName()
<< "' and the value ";
matcher_.DescribeTo(os);
}
void DescribeNegationTo(std::ostream* os) const {
*os << "is a variant<> with value of type other than '" << GetTypeName()
<< "' or the value ";
matcher_.DescribeNegationTo(os);
}
private:
static std::string GetTypeName() {
#if GTEST_HAS_RTTI
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
return internal::GetTypeName<T>());
#endif
return "the element type";
}
const ::testing::Matcher<const T&> matcher_;
};
} // namespace variant_matcher
namespace any_cast_matcher {
// Overloads to allow AnyCastMatcher to do proper ADL lookup.
template <typename T>
void any_cast() {}
// Implements a matcher that any_casts the value.
template <typename T>
class AnyCastMatcher {
public:
explicit AnyCastMatcher(const ::testing::Matcher<const T&>& matcher)
: matcher_(matcher) {}
template <typename AnyType>
bool MatchAndExplain(const AnyType& value,
::testing::MatchResultListener* listener) const {
if (!listener->IsInterested()) {
const T* ptr = any_cast<T>(&value);
return ptr != NULL && matcher_.Matches(*ptr);
}
const T* elem = any_cast<T>(&value);
if (elem == NULL) {
*listener << "whose value is not of type '" << GetTypeName() << "'";
return false;
}
StringMatchResultListener elem_listener;
const bool match = matcher_.MatchAndExplain(*elem, &elem_listener);
*listener << "whose value " << PrintToString(*elem)
<< (match ? " matches" : " doesn't match");
PrintIfNotEmpty(elem_listener.str(), listener->stream());
return match;
}
void DescribeTo(std::ostream* os) const {
*os << "is an 'any' type with value of type '" << GetTypeName()
<< "' and the value ";
matcher_.DescribeTo(os);
}
void DescribeNegationTo(std::ostream* os) const {
*os << "is an 'any' type with value of type other than '" << GetTypeName()
<< "' or the value ";
matcher_.DescribeNegationTo(os);
}
private:
static std::string GetTypeName() {
#if GTEST_HAS_RTTI
GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
return internal::GetTypeName<T>());
#endif
return "the element type";
}
const ::testing::Matcher<const T&> matcher_;
};
} // namespace any_cast_matcher
} // namespace internal
// ElementsAreArray(iterator_first, iterator_last)
// ElementsAreArray(pointer, count)
// ElementsAreArray(array)
// ElementsAreArray(container)
// ElementsAreArray({ e1, e2, ..., en })
//
// The ElementsAreArray() functions are like ElementsAre(...), except
// that they are given a homogeneous sequence rather than taking each
// element as a function argument. The sequence can be specified as an
// array, a pointer and count, a vector, an initializer list, or an
// STL iterator range. In each of these cases, the underlying sequence
// can be either a sequence of values or a sequence of matchers.
//
// All forms of ElementsAreArray() make a copy of the input matcher sequence.
template <typename Iter>
inline internal::ElementsAreArrayMatcher<
typename ::std::iterator_traits<Iter>::value_type>
ElementsAreArray(Iter first, Iter last) {
typedef typename ::std::iterator_traits<Iter>::value_type T;
return internal::ElementsAreArrayMatcher<T>(first, last);
}
template <typename T>
inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
const T* pointer, size_t count) {
return ElementsAreArray(pointer, pointer + count);
}
template <typename T, size_t N>
inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
const T (&array)[N]) {
return ElementsAreArray(array, N);
}
template <typename Container>
inline internal::ElementsAreArrayMatcher<typename Container::value_type>
ElementsAreArray(const Container& container) {
return ElementsAreArray(container.begin(), container.end());
}
#if GTEST_HAS_STD_INITIALIZER_LIST_
template <typename T>
inline internal::ElementsAreArrayMatcher<T>
ElementsAreArray(::std::initializer_list<T> xs) {
return ElementsAreArray(xs.begin(), xs.end());
}
#endif
// UnorderedElementsAreArray(iterator_first, iterator_last)
// UnorderedElementsAreArray(pointer, count)
// UnorderedElementsAreArray(array)
// UnorderedElementsAreArray(container)
// UnorderedElementsAreArray({ e1, e2, ..., en })
//
// UnorderedElementsAreArray() verifies that a bijective mapping onto a
// collection of matchers exists.
//
// The matchers can be specified as an array, a pointer and count, a container,
// an initializer list, or an STL iterator range. In each of these cases, the
// underlying matchers can be either values or matchers.
template <typename Iter>
inline internal::UnorderedElementsAreArrayMatcher<
typename ::std::iterator_traits<Iter>::value_type>
UnorderedElementsAreArray(Iter first, Iter last) {
typedef typename ::std::iterator_traits<Iter>::value_type T;
return internal::UnorderedElementsAreArrayMatcher<T>(
internal::UnorderedMatcherRequire::ExactMatch, first, last);
}
template <typename T>
inline internal::UnorderedElementsAreArrayMatcher<T>
UnorderedElementsAreArray(const T* pointer, size_t count) {
return UnorderedElementsAreArray(pointer, pointer + count);
}
template <typename T, size_t N>
inline internal::UnorderedElementsAreArrayMatcher<T>
UnorderedElementsAreArray(const T (&array)[N]) {
return UnorderedElementsAreArray(array, N);
}
template <typename Container>
inline internal::UnorderedElementsAreArrayMatcher<
typename Container::value_type>
UnorderedElementsAreArray(const Container& container) {
return UnorderedElementsAreArray(container.begin(), container.end());
}
#if GTEST_HAS_STD_INITIALIZER_LIST_
template <typename T>
inline internal::UnorderedElementsAreArrayMatcher<T>
UnorderedElementsAreArray(::std::initializer_list<T> xs) {
return UnorderedElementsAreArray(xs.begin(), xs.end());
}
#endif
// _ is a matcher that matches anything of any type.
//
// This definition is fine as:
//
// 1. The C++ standard permits using the name _ in a namespace that
// is not the global namespace or ::std.
// 2. The AnythingMatcher class has no data member or constructor,
// so it's OK to create global variables of this type.
// 3. c-style has approved of using _ in this case.
const internal::AnythingMatcher _ = {};
// Creates a matcher that matches any value of the given type T.
template <typename T>
inline Matcher<T> A() {
return Matcher<T>(new internal::AnyMatcherImpl<T>());
}
// Creates a matcher that matches any value of the given type T.
template <typename T>
inline Matcher<T> An() { return A<T>(); }
// Creates a polymorphic matcher that matches anything equal to x.
// Note: if the parameter of Eq() were declared as const T&, Eq("foo")
// wouldn't compile.
template <typename T>
inline internal::EqMatcher<T> Eq(T x) { return internal::EqMatcher<T>(x); }
// Constructs a Matcher<T> from a 'value' of type T. The constructed
// matcher matches any value that's equal to 'value'.
template <typename T>
Matcher<T>::Matcher(T value) { *this = Eq(value); }
template <typename T, typename M>
Matcher<T> internal::MatcherCastImpl<T, M>::CastImpl(
const M& value,
internal::BooleanConstant<false> /* convertible_to_matcher */,
internal::BooleanConstant<false> /* convertible_to_T */) {
return Eq(value);
}
// Creates a monomorphic matcher that matches anything with type Lhs
// and equal to rhs. A user may need to use this instead of Eq(...)
// in order to resolve an overloading ambiguity.
//
// TypedEq<T>(x) is just a convenient short-hand for Matcher<T>(Eq(x))
// or Matcher<T>(x), but more readable than the latter.
//
// We could define similar monomorphic matchers for other comparison
// operations (e.g. TypedLt, TypedGe, and etc), but decided not to do
// it yet as those are used much less than Eq() in practice. A user
// can always write Matcher<T>(Lt(5)) to be explicit about the type,
// for example.
template <typename Lhs, typename Rhs>
inline Matcher<Lhs> TypedEq(const Rhs& rhs) { return Eq(rhs); }
// Creates a polymorphic matcher that matches anything >= x.
template <typename Rhs>
inline internal::GeMatcher<Rhs> Ge(Rhs x) {
return internal::GeMatcher<Rhs>(x);
}
// Creates a polymorphic matcher that matches anything > x.
template <typename Rhs>
inline internal::GtMatcher<Rhs> Gt(Rhs x) {
return internal::GtMatcher<Rhs>(x);
}
// Creates a polymorphic matcher that matches anything <= x.
template <typename Rhs>
inline internal::LeMatcher<Rhs> Le(Rhs x) {
return internal::LeMatcher<Rhs>(x);
}
// Creates a polymorphic matcher that matches anything < x.
template <typename Rhs>
inline internal::LtMatcher<Rhs> Lt(Rhs x) {
return internal::LtMatcher<Rhs>(x);
}
// Creates a polymorphic matcher that matches anything != x.
template <typename Rhs>
inline internal::NeMatcher<Rhs> Ne(Rhs x) {
return internal::NeMatcher<Rhs>(x);
}
// Creates a polymorphic matcher that matches any NULL pointer.
inline PolymorphicMatcher<internal::IsNullMatcher > IsNull() {
return MakePolymorphicMatcher(internal::IsNullMatcher());
}
// Creates a polymorphic matcher that matches any non-NULL pointer.
// This is convenient as Not(NULL) doesn't compile (the compiler
// thinks that that expression is comparing a pointer with an integer).
inline PolymorphicMatcher<internal::NotNullMatcher > NotNull() {
return MakePolymorphicMatcher(internal::NotNullMatcher());
}
// Creates a polymorphic matcher that matches any argument that
// references variable x.
template <typename T>
inline internal::RefMatcher<T&> Ref(T& x) { // NOLINT
return internal::RefMatcher<T&>(x);
}
// Creates a matcher that matches any double argument approximately
// equal to rhs, where two NANs are considered unequal.
inline internal::FloatingEqMatcher<double> DoubleEq(double rhs) {
return internal::FloatingEqMatcher<double>(rhs, false);
}
// Creates a matcher that matches any double argument approximately
// equal to rhs, including NaN values when rhs is NaN.
inline internal::FloatingEqMatcher<double> NanSensitiveDoubleEq(double rhs) {
return internal::FloatingEqMatcher<double>(rhs, true);
}
// Creates a matcher that matches any double argument approximately equal to
// rhs, up to the specified max absolute error bound, where two NANs are
// considered unequal. The max absolute error bound must be non-negative.
inline internal::FloatingEqMatcher<double> DoubleNear(
double rhs, double max_abs_error) {
return internal::FloatingEqMatcher<double>(rhs, false, max_abs_error);
}
// Creates a matcher that matches any double argument approximately equal to
// rhs, up to the specified max absolute error bound, including NaN values when
// rhs is NaN. The max absolute error bound must be non-negative.
inline internal::FloatingEqMatcher<double> NanSensitiveDoubleNear(
double rhs, double max_abs_error) {
return internal::FloatingEqMatcher<double>(rhs, true, max_abs_error);
}
// Creates a matcher that matches any float argument approximately
// equal to rhs, where two NANs are considered unequal.
inline internal::FloatingEqMatcher<float> FloatEq(float rhs) {
return internal::FloatingEqMatcher<float>(rhs, false);
}
// Creates a matcher that matches any float argument approximately
// equal to rhs, including NaN values when rhs is NaN.
inline internal::FloatingEqMatcher<float> NanSensitiveFloatEq(float rhs) {
return internal::FloatingEqMatcher<float>(rhs, true);
}
// Creates a matcher that matches any float argument approximately equal to
// rhs, up to the specified max absolute error bound, where two NANs are
// considered unequal. The max absolute error bound must be non-negative.
inline internal::FloatingEqMatcher<float> FloatNear(
float rhs, float max_abs_error) {
return internal::FloatingEqMatcher<float>(rhs, false, max_abs_error);
}
// Creates a matcher that matches any float argument approximately equal to
// rhs, up to the specified max absolute error bound, including NaN values when
// rhs is NaN. The max absolute error bound must be non-negative.
inline internal::FloatingEqMatcher<float> NanSensitiveFloatNear(
float rhs, float max_abs_error) {
return internal::FloatingEqMatcher<float>(rhs, true, max_abs_error);
}
// Creates a matcher that matches a pointer (raw or smart) that points
// to a value that matches inner_matcher.
template <typename InnerMatcher>
inline internal::PointeeMatcher<InnerMatcher> Pointee(
const InnerMatcher& inner_matcher) {
return internal::PointeeMatcher<InnerMatcher>(inner_matcher);
}
#if GTEST_HAS_RTTI
// Creates a matcher that matches a pointer or reference that matches
// inner_matcher when dynamic_cast<To> is applied.
// The result of dynamic_cast<To> is forwarded to the inner matcher.
// If To is a pointer and the cast fails, the inner matcher will receive NULL.
// If To is a reference and the cast fails, this matcher returns false
// immediately.
template <typename To>
inline PolymorphicMatcher<internal::WhenDynamicCastToMatcher<To> >
WhenDynamicCastTo(const Matcher<To>& inner_matcher) {
return MakePolymorphicMatcher(
internal::WhenDynamicCastToMatcher<To>(inner_matcher));
}
#endif // GTEST_HAS_RTTI
// Creates a matcher that matches an object whose given field matches
// 'matcher'. For example,
// Field(&Foo::number, Ge(5))
// matches a Foo object x iff x.number >= 5.
template <typename Class, typename FieldType, typename FieldMatcher>
inline PolymorphicMatcher<
internal::FieldMatcher<Class, FieldType> > Field(
FieldType Class::*field, const FieldMatcher& matcher) {
return MakePolymorphicMatcher(
internal::FieldMatcher<Class, FieldType>(
field, MatcherCast<const FieldType&>(matcher)));
// The call to MatcherCast() is required for supporting inner
// matchers of compatible types. For example, it allows
// Field(&Foo::bar, m)
// to compile where bar is an int32 and m is a matcher for int64.
}
// Same as Field() but also takes the name of the field to provide better error
// messages.
template <typename Class, typename FieldType, typename FieldMatcher>
inline PolymorphicMatcher<internal::FieldMatcher<Class, FieldType> > Field(
const std::string& field_name, FieldType Class::*field,
const FieldMatcher& matcher) {
return MakePolymorphicMatcher(internal::FieldMatcher<Class, FieldType>(
field_name, field, MatcherCast<const FieldType&>(matcher)));
}
// Creates a matcher that matches an object whose given property
// matches 'matcher'. For example,
// Property(&Foo::str, StartsWith("hi"))
// matches a Foo object x iff x.str() starts with "hi".
template <typename Class, typename PropertyType, typename PropertyMatcher>
inline PolymorphicMatcher<internal::PropertyMatcher<
Class, PropertyType, PropertyType (Class::*)() const> >
Property(PropertyType (Class::*property)() const,
const PropertyMatcher& matcher) {
return MakePolymorphicMatcher(
internal::PropertyMatcher<Class, PropertyType,
PropertyType (Class::*)() const>(
property,
MatcherCast<GTEST_REFERENCE_TO_CONST_(PropertyType)>(matcher)));
// The call to MatcherCast() is required for supporting inner
// matchers of compatible types. For example, it allows
// Property(&Foo::bar, m)
// to compile where bar() returns an int32 and m is a matcher for int64.
}
// Same as Property() above, but also takes the name of the property to provide
// better error messages.
template <typename Class, typename PropertyType, typename PropertyMatcher>
inline PolymorphicMatcher<internal::PropertyMatcher<
Class, PropertyType, PropertyType (Class::*)() const> >
Property(const std::string& property_name,
PropertyType (Class::*property)() const,
const PropertyMatcher& matcher) {
return MakePolymorphicMatcher(
internal::PropertyMatcher<Class, PropertyType,
PropertyType (Class::*)() const>(
property_name, property,
MatcherCast<GTEST_REFERENCE_TO_CONST_(PropertyType)>(matcher)));
}
#if GTEST_LANG_CXX11
// The same as above but for reference-qualified member functions.
template <typename Class, typename PropertyType, typename PropertyMatcher>
inline PolymorphicMatcher<internal::PropertyMatcher<
Class, PropertyType, PropertyType (Class::*)() const &> >
Property(PropertyType (Class::*property)() const &,
const PropertyMatcher& matcher) {
return MakePolymorphicMatcher(
internal::PropertyMatcher<Class, PropertyType,
PropertyType (Class::*)() const &>(
property,
MatcherCast<GTEST_REFERENCE_TO_CONST_(PropertyType)>(matcher)));
}
// Three-argument form for reference-qualified member functions.
template <typename Class, typename PropertyType, typename PropertyMatcher>
inline PolymorphicMatcher<internal::PropertyMatcher<
Class, PropertyType, PropertyType (Class::*)() const &> >
Property(const std::string& property_name,
PropertyType (Class::*property)() const &,
const PropertyMatcher& matcher) {
return MakePolymorphicMatcher(
internal::PropertyMatcher<Class, PropertyType,
PropertyType (Class::*)() const &>(
property_name, property,
MatcherCast<GTEST_REFERENCE_TO_CONST_(PropertyType)>(matcher)));
}
#endif
// Creates a matcher that matches an object iff the result of applying
// a callable to x matches 'matcher'.
// For example,
// ResultOf(f, StartsWith("hi"))
// matches a Foo object x iff f(x) starts with "hi".
// `callable` parameter can be a function, function pointer, or a functor. It is
// required to keep no state affecting the results of the calls on it and make
// no assumptions about how many calls will be made. Any state it keeps must be
// protected from the concurrent access.
template <typename Callable, typename InnerMatcher>
internal::ResultOfMatcher<Callable, InnerMatcher> ResultOf(
Callable callable, InnerMatcher matcher) {
return internal::ResultOfMatcher<Callable, InnerMatcher>(
internal::move(callable), internal::move(matcher));
}
// String matchers.
// Matches a string equal to str.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrEq(
const std::string& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::string>(str, true, true));
}
// Matches a string not equal to str.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrNe(
const std::string& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::string>(str, false, true));
}
// Matches a string equal to str, ignoring case.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseEq(
const std::string& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::string>(str, true, false));
}
// Matches a string not equal to str, ignoring case.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseNe(
const std::string& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::string>(str, false, false));
}
// Creates a matcher that matches any string, std::string, or C string
// that contains the given substring.
inline PolymorphicMatcher<internal::HasSubstrMatcher<std::string> > HasSubstr(
const std::string& substring) {
return MakePolymorphicMatcher(
internal::HasSubstrMatcher<std::string>(substring));
}
// Matches a string that starts with 'prefix' (case-sensitive).
inline PolymorphicMatcher<internal::StartsWithMatcher<std::string> > StartsWith(
const std::string& prefix) {
return MakePolymorphicMatcher(
internal::StartsWithMatcher<std::string>(prefix));
}
// Matches a string that ends with 'suffix' (case-sensitive).
inline PolymorphicMatcher<internal::EndsWithMatcher<std::string> > EndsWith(
const std::string& suffix) {
return MakePolymorphicMatcher(internal::EndsWithMatcher<std::string>(suffix));
}
// Matches a string that fully matches regular expression 'regex'.
// The matcher takes ownership of 'regex'.
inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
const internal::RE* regex) {
return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, true));
}
inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
const std::string& regex) {
return MatchesRegex(new internal::RE(regex));
}
// Matches a string that contains regular expression 'regex'.
// The matcher takes ownership of 'regex'.
inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
const internal::RE* regex) {
return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, false));
}
inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
const std::string& regex) {
return ContainsRegex(new internal::RE(regex));
}
#if GTEST_HAS_GLOBAL_WSTRING || GTEST_HAS_STD_WSTRING
// Wide string matchers.
// Matches a string equal to str.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrEq(
const std::wstring& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::wstring>(str, true, true));
}
// Matches a string not equal to str.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrNe(
const std::wstring& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::wstring>(str, false, true));
}
// Matches a string equal to str, ignoring case.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
StrCaseEq(const std::wstring& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::wstring>(str, true, false));
}
// Matches a string not equal to str, ignoring case.
inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
StrCaseNe(const std::wstring& str) {
return MakePolymorphicMatcher(
internal::StrEqualityMatcher<std::wstring>(str, false, false));
}
// Creates a matcher that matches any ::wstring, std::wstring, or C wide string
// that contains the given substring.
inline PolymorphicMatcher<internal::HasSubstrMatcher<std::wstring> > HasSubstr(
const std::wstring& substring) {
return MakePolymorphicMatcher(
internal::HasSubstrMatcher<std::wstring>(substring));
}
// Matches a string that starts with 'prefix' (case-sensitive).
inline PolymorphicMatcher<internal::StartsWithMatcher<std::wstring> >
StartsWith(const std::wstring& prefix) {
return MakePolymorphicMatcher(
internal::StartsWithMatcher<std::wstring>(prefix));
}
// Matches a string that ends with 'suffix' (case-sensitive).
inline PolymorphicMatcher<internal::EndsWithMatcher<std::wstring> > EndsWith(
const std::wstring& suffix) {
return MakePolymorphicMatcher(
internal::EndsWithMatcher<std::wstring>(suffix));
}
#endif // GTEST_HAS_GLOBAL_WSTRING || GTEST_HAS_STD_WSTRING
// Creates a polymorphic matcher that matches a 2-tuple where the
// first field == the second field.
inline internal::Eq2Matcher Eq() { return internal::Eq2Matcher(); }
// Creates a polymorphic matcher that matches a 2-tuple where the
// first field >= the second field.
inline internal::Ge2Matcher Ge() { return internal::Ge2Matcher(); }
// Creates a polymorphic matcher that matches a 2-tuple where the
// first field > the second field.
inline internal::Gt2Matcher Gt() { return internal::Gt2Matcher(); }
// Creates a polymorphic matcher that matches a 2-tuple where the
// first field <= the second field.
inline internal::Le2Matcher Le() { return internal::Le2Matcher(); }
// Creates a polymorphic matcher that matches a 2-tuple where the
// first field < the second field.
inline internal::Lt2Matcher Lt() { return internal::Lt2Matcher(); }
// Creates a polymorphic matcher that matches a 2-tuple where the
// first field != the second field.
inline internal::Ne2Matcher Ne() { return internal::Ne2Matcher(); }
// Creates a polymorphic matcher that matches a 2-tuple where
// FloatEq(first field) matches the second field.
inline internal::FloatingEq2Matcher<float> FloatEq() {
return internal::FloatingEq2Matcher<float>();
}
// Creates a polymorphic matcher that matches a 2-tuple where
// DoubleEq(first field) matches the second field.
inline internal::FloatingEq2Matcher<double> DoubleEq() {
return internal::FloatingEq2Matcher<double>();
}
// Creates a polymorphic matcher that matches a 2-tuple where
// FloatEq(first field) matches the second field with NaN equality.
inline internal::FloatingEq2Matcher<float> NanSensitiveFloatEq() {
return internal::FloatingEq2Matcher<float>(true);
}
// Creates a polymorphic matcher that matches a 2-tuple where
// DoubleEq(first field) matches the second field with NaN equality.
inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleEq() {
return internal::FloatingEq2Matcher<double>(true);
}
// Creates a polymorphic matcher that matches a 2-tuple where
// FloatNear(first field, max_abs_error) matches the second field.
inline internal::FloatingEq2Matcher<float> FloatNear(float max_abs_error) {
return internal::FloatingEq2Matcher<float>(max_abs_error);
}
// Creates a polymorphic matcher that matches a 2-tuple where
// DoubleNear(first field, max_abs_error) matches the second field.
inline internal::FloatingEq2Matcher<double> DoubleNear(double max_abs_error) {
return internal::FloatingEq2Matcher<double>(max_abs_error);
}
// Creates a polymorphic matcher that matches a 2-tuple where
// FloatNear(first field, max_abs_error) matches the second field with NaN
// equality.
inline internal::FloatingEq2Matcher<float> NanSensitiveFloatNear(
float max_abs_error) {
return internal::FloatingEq2Matcher<float>(max_abs_error, true);
}
// Creates a polymorphic matcher that matches a 2-tuple where
// DoubleNear(first field, max_abs_error) matches the second field with NaN
// equality.
inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleNear(
double max_abs_error) {
return internal::FloatingEq2Matcher<double>(max_abs_error, true);
}
// Creates a matcher that matches any value of type T that m doesn't
// match.
template <typename InnerMatcher>
inline internal::NotMatcher<InnerMatcher> Not(InnerMatcher m) {
return internal::NotMatcher<InnerMatcher>(m);
}
// Returns a matcher that matches anything that satisfies the given
// predicate. The predicate can be any unary function or functor
// whose return type can be implicitly converted to bool.
template <typename Predicate>
inline PolymorphicMatcher<internal::TrulyMatcher<Predicate> >
Truly(Predicate pred) {
return MakePolymorphicMatcher(internal::TrulyMatcher<Predicate>(pred));
}
// Returns a matcher that matches the container size. The container must
// support both size() and size_type which all STL-like containers provide.
// Note that the parameter 'size' can be a value of type size_type as well as
// matcher. For instance:
// EXPECT_THAT(container, SizeIs(2)); // Checks container has 2 elements.
// EXPECT_THAT(container, SizeIs(Le(2)); // Checks container has at most 2.
template <typename SizeMatcher>
inline internal::SizeIsMatcher<SizeMatcher>
SizeIs(const SizeMatcher& size_matcher) {
return internal::SizeIsMatcher<SizeMatcher>(size_matcher);
}
// Returns a matcher that matches the distance between the container's begin()
// iterator and its end() iterator, i.e. the size of the container. This matcher
// can be used instead of SizeIs with containers such as std::forward_list which
// do not implement size(). The container must provide const_iterator (with
// valid iterator_traits), begin() and end().
template <typename DistanceMatcher>
inline internal::BeginEndDistanceIsMatcher<DistanceMatcher>
BeginEndDistanceIs(const DistanceMatcher& distance_matcher) {
return internal::BeginEndDistanceIsMatcher<DistanceMatcher>(distance_matcher);
}
// Returns a matcher that matches an equal container.
// This matcher behaves like Eq(), but in the event of mismatch lists the
// values that are included in one container but not the other. (Duplicate
// values and order differences are not explained.)
template <typename Container>
inline PolymorphicMatcher<internal::ContainerEqMatcher< // NOLINT
GTEST_REMOVE_CONST_(Container)> >
ContainerEq(const Container& rhs) {
// This following line is for working around a bug in MSVC 8.0,
// which causes Container to be a const type sometimes.
typedef GTEST_REMOVE_CONST_(Container) RawContainer;
return MakePolymorphicMatcher(
internal::ContainerEqMatcher<RawContainer>(rhs));
}
// Returns a matcher that matches a container that, when sorted using
// the given comparator, matches container_matcher.
template <typename Comparator, typename ContainerMatcher>
inline internal::WhenSortedByMatcher<Comparator, ContainerMatcher>
WhenSortedBy(const Comparator& comparator,
const ContainerMatcher& container_matcher) {
return internal::WhenSortedByMatcher<Comparator, ContainerMatcher>(
comparator, container_matcher);
}
// Returns a matcher that matches a container that, when sorted using
// the < operator, matches container_matcher.
template <typename ContainerMatcher>
inline internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>
WhenSorted(const ContainerMatcher& container_matcher) {
return
internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>(
internal::LessComparator(), container_matcher);
}
// Matches an STL-style container or a native array that contains the
// same number of elements as in rhs, where its i-th element and rhs's
// i-th element (as a pair) satisfy the given pair matcher, for all i.
// TupleMatcher must be able to be safely cast to Matcher<tuple<const
// T1&, const T2&> >, where T1 and T2 are the types of elements in the
// LHS container and the RHS container respectively.
template <typename TupleMatcher, typename Container>
inline internal::PointwiseMatcher<TupleMatcher,
GTEST_REMOVE_CONST_(Container)>
Pointwise(const TupleMatcher& tuple_matcher, const Container& rhs) {
// This following line is for working around a bug in MSVC 8.0,
// which causes Container to be a const type sometimes (e.g. when
// rhs is a const int[])..
typedef GTEST_REMOVE_CONST_(Container) RawContainer;
return internal::PointwiseMatcher<TupleMatcher, RawContainer>(
tuple_matcher, rhs);
}
#if GTEST_HAS_STD_INITIALIZER_LIST_
// Supports the Pointwise(m, {a, b, c}) syntax.
template <typename TupleMatcher, typename T>
inline internal::PointwiseMatcher<TupleMatcher, std::vector<T> > Pointwise(
const TupleMatcher& tuple_matcher, std::initializer_list<T> rhs) {
return Pointwise(tuple_matcher, std::vector<T>(rhs));
}
#endif // GTEST_HAS_STD_INITIALIZER_LIST_
// UnorderedPointwise(pair_matcher, rhs) matches an STL-style
// container or a native array that contains the same number of
// elements as in rhs, where in some permutation of the container, its
// i-th element and rhs's i-th element (as a pair) satisfy the given
// pair matcher, for all i. Tuple2Matcher must be able to be safely
// cast to Matcher<tuple<const T1&, const T2&> >, where T1 and T2 are
// the types of elements in the LHS container and the RHS container
// respectively.
//
// This is like Pointwise(pair_matcher, rhs), except that the element
// order doesn't matter.
template <typename Tuple2Matcher, typename RhsContainer>
inline internal::UnorderedElementsAreArrayMatcher<
typename internal::BoundSecondMatcher<
Tuple2Matcher, typename internal::StlContainerView<GTEST_REMOVE_CONST_(
RhsContainer)>::type::value_type> >
UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
const RhsContainer& rhs_container) {
// This following line is for working around a bug in MSVC 8.0,
// which causes RhsContainer to be a const type sometimes (e.g. when
// rhs_container is a const int[]).
typedef GTEST_REMOVE_CONST_(RhsContainer) RawRhsContainer;
// RhsView allows the same code to handle RhsContainer being a
// STL-style container and it being a native C-style array.
typedef typename internal::StlContainerView<RawRhsContainer> RhsView;
typedef typename RhsView::type RhsStlContainer;
typedef typename RhsStlContainer::value_type Second;
const RhsStlContainer& rhs_stl_container =
RhsView::ConstReference(rhs_container);
// Create a matcher for each element in rhs_container.
::std::vector<internal::BoundSecondMatcher<Tuple2Matcher, Second> > matchers;
for (typename RhsStlContainer::const_iterator it = rhs_stl_container.begin();
it != rhs_stl_container.end(); ++it) {
matchers.push_back(
internal::MatcherBindSecond(tuple2_matcher, *it));
}
// Delegate the work to UnorderedElementsAreArray().
return UnorderedElementsAreArray(matchers);
}
#if GTEST_HAS_STD_INITIALIZER_LIST_
// Supports the UnorderedPointwise(m, {a, b, c}) syntax.
template <typename Tuple2Matcher, typename T>
inline internal::UnorderedElementsAreArrayMatcher<
typename internal::BoundSecondMatcher<Tuple2Matcher, T> >
UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
std::initializer_list<T> rhs) {
return UnorderedPointwise(tuple2_matcher, std::vector<T>(rhs));
}
#endif // GTEST_HAS_STD_INITIALIZER_LIST_
// Matches an STL-style container or a native array that contains at
// least one element matching the given value or matcher.
//
// Examples:
// ::std::set<int> page_ids;
// page_ids.insert(3);
// page_ids.insert(1);
// EXPECT_THAT(page_ids, Contains(1));
// EXPECT_THAT(page_ids, Contains(Gt(2)));
// EXPECT_THAT(page_ids, Not(Contains(4)));
//
// ::std::map<int, size_t> page_lengths;
// page_lengths[1] = 100;
// EXPECT_THAT(page_lengths,
// Contains(::std::pair<const int, size_t>(1, 100)));
//
// const char* user_ids[] = { "joe", "mike", "tom" };
// EXPECT_THAT(user_ids, Contains(Eq(::std::string("tom"))));
template <typename M>
inline internal::ContainsMatcher<M> Contains(M matcher) {
return internal::ContainsMatcher<M>(matcher);
}
// IsSupersetOf(iterator_first, iterator_last)
// IsSupersetOf(pointer, count)
// IsSupersetOf(array)
// IsSupersetOf(container)
// IsSupersetOf({e1, e2, ..., en})
//
// IsSupersetOf() verifies that a surjective partial mapping onto a collection
// of matchers exists. In other words, a container matches
// IsSupersetOf({e1, ..., en}) if and only if there is a permutation
// {y1, ..., yn} of some of the container's elements where y1 matches e1,
// ..., and yn matches en. Obviously, the size of the container must be >= n
// in order to have a match. Examples:
//
// - {1, 2, 3} matches IsSupersetOf({Ge(3), Ne(0)}), as 3 matches Ge(3) and
// 1 matches Ne(0).
// - {1, 2} doesn't match IsSupersetOf({Eq(1), Lt(2)}), even though 1 matches
// both Eq(1) and Lt(2). The reason is that different matchers must be used
// for elements in different slots of the container.
// - {1, 1, 2} matches IsSupersetOf({Eq(1), Lt(2)}), as (the first) 1 matches
// Eq(1) and (the second) 1 matches Lt(2).
// - {1, 2, 3} matches IsSupersetOf(Gt(1), Gt(1)), as 2 matches (the first)
// Gt(1) and 3 matches (the second) Gt(1).
//
// The matchers can be specified as an array, a pointer and count, a container,
// an initializer list, or an STL iterator range. In each of these cases, the
// underlying matchers can be either values or matchers.
template <typename Iter>
inline internal::UnorderedElementsAreArrayMatcher<
typename ::std::iterator_traits<Iter>::value_type>
IsSupersetOf(Iter first, Iter last) {
typedef typename ::std::iterator_traits<Iter>::value_type T;
return internal::UnorderedElementsAreArrayMatcher<T>(
internal::UnorderedMatcherRequire::Superset, first, last);
}
template <typename T>
inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
const T* pointer, size_t count) {
return IsSupersetOf(pointer, pointer + count);
}
template <typename T, size_t N>
inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
const T (&array)[N]) {
return IsSupersetOf(array, N);
}
template <typename Container>
inline internal::UnorderedElementsAreArrayMatcher<
typename Container::value_type>
IsSupersetOf(const Container& container) {
return IsSupersetOf(container.begin(), container.end());
}
#if GTEST_HAS_STD_INITIALIZER_LIST_
template <typename T>
inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
::std::initializer_list<T> xs) {
return IsSupersetOf(xs.begin(), xs.end());
}
#endif
// IsSubsetOf(iterator_first, iterator_last)
// IsSubsetOf(pointer, count)
// IsSubsetOf(array)
// IsSubsetOf(container)
// IsSubsetOf({e1, e2, ..., en})
//
// IsSubsetOf() verifies that an injective mapping onto a collection of matchers
// exists. In other words, a container matches IsSubsetOf({e1, ..., en}) if and
// only if there is a subset of matchers {m1, ..., mk} which would match the
// container using UnorderedElementsAre. Obviously, the size of the container
// must be <= n in order to have a match. Examples:
//
// - {1} matches IsSubsetOf({Gt(0), Lt(0)}), as 1 matches Gt(0).
// - {1, -1} matches IsSubsetOf({Lt(0), Gt(0)}), as 1 matches Gt(0) and -1
// matches Lt(0).
// - {1, 2} doesn't matches IsSubsetOf({Gt(0), Lt(0)}), even though 1 and 2 both
// match Gt(0). The reason is that different matchers must be used for
// elements in different slots of the container.
//
// The matchers can be specified as an array, a pointer and count, a container,
// an initializer list, or an STL iterator range. In each of these cases, the
// underlying matchers can be either values or matchers.
template <typename Iter>
inline internal::UnorderedElementsAreArrayMatcher<
typename ::std::iterator_traits<Iter>::value_type>
IsSubsetOf(Iter first, Iter last) {
typedef typename ::std::iterator_traits<Iter>::value_type T;
return internal::UnorderedElementsAreArrayMatcher<T>(
internal::UnorderedMatcherRequire::Subset, first, last);
}
template <typename T>
inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
const T* pointer, size_t count) {
return IsSubsetOf(pointer, pointer + count);
}
template <typename T, size_t N>
inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
const T (&array)[N]) {
return IsSubsetOf(array, N);
}
template <typename Container>
inline internal::UnorderedElementsAreArrayMatcher<
typename Container::value_type>
IsSubsetOf(const Container& container) {
return IsSubsetOf(container.begin(), container.end());
}
#if GTEST_HAS_STD_INITIALIZER_LIST_
template <typename T>
inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
::std::initializer_list<T> xs) {
return IsSubsetOf(xs.begin(), xs.end());
}
#endif
// Matches an STL-style container or a native array that contains only
// elements matching the given value or matcher.
//
// Each(m) is semantically equivalent to Not(Contains(Not(m))). Only
// the messages are different.
//
// Examples:
// ::std::set<int> page_ids;
// // Each(m) matches an empty container, regardless of what m is.
// EXPECT_THAT(page_ids, Each(Eq(1)));
// EXPECT_THAT(page_ids, Each(Eq(77)));
//
// page_ids.insert(3);
// EXPECT_THAT(page_ids, Each(Gt(0)));
// EXPECT_THAT(page_ids, Not(Each(Gt(4))));
// page_ids.insert(1);
// EXPECT_THAT(page_ids, Not(Each(Lt(2))));
//
// ::std::map<int, size_t> page_lengths;
// page_lengths[1] = 100;
// page_lengths[2] = 200;
// page_lengths[3] = 300;
// EXPECT_THAT(page_lengths, Not(Each(Pair(1, 100))));
// EXPECT_THAT(page_lengths, Each(Key(Le(3))));
//
// const char* user_ids[] = { "joe", "mike", "tom" };
// EXPECT_THAT(user_ids, Not(Each(Eq(::std::string("tom")))));
template <typename M>
inline internal::EachMatcher<M> Each(M matcher) {
return internal::EachMatcher<M>(matcher);
}
// Key(inner_matcher) matches an std::pair whose 'first' field matches
// inner_matcher. For example, Contains(Key(Ge(5))) can be used to match an
// std::map that contains at least one element whose key is >= 5.
template <typename M>
inline internal::KeyMatcher<M> Key(M inner_matcher) {
return internal::KeyMatcher<M>(inner_matcher);
}
// Pair(first_matcher, second_matcher) matches a std::pair whose 'first' field
// matches first_matcher and whose 'second' field matches second_matcher. For
// example, EXPECT_THAT(map_type, ElementsAre(Pair(Ge(5), "foo"))) can be used
// to match a std::map<int, string> that contains exactly one element whose key
// is >= 5 and whose value equals "foo".
template <typename FirstMatcher, typename SecondMatcher>
inline internal::PairMatcher<FirstMatcher, SecondMatcher>
Pair(FirstMatcher first_matcher, SecondMatcher second_matcher) {
return internal::PairMatcher<FirstMatcher, SecondMatcher>(
first_matcher, second_matcher);
}
// Returns a predicate that is satisfied by anything that matches the
// given matcher.
template <typename M>
inline internal::MatcherAsPredicate<M> Matches(M matcher) {
return internal::MatcherAsPredicate<M>(matcher);
}
// Returns true iff the value matches the matcher.
template <typename T, typename M>
inline bool Value(const T& value, M matcher) {
return testing::Matches(matcher)(value);
}
// Matches the value against the given matcher and explains the match
// result to listener.
template <typename T, typename M>
inline bool ExplainMatchResult(
M matcher, const T& value, MatchResultListener* listener) {
return SafeMatcherCast<const T&>(matcher).MatchAndExplain(value, listener);
}
// Returns a string representation of the given matcher. Useful for description
// strings of matchers defined using MATCHER_P* macros that accept matchers as
// their arguments. For example:
//
// MATCHER_P(XAndYThat, matcher,
// "X that " + DescribeMatcher<int>(matcher, negation) +
// " and Y that " + DescribeMatcher<double>(matcher, negation)) {
// return ExplainMatchResult(matcher, arg.x(), result_listener) &&
// ExplainMatchResult(matcher, arg.y(), result_listener);
// }
template <typename T, typename M>
std::string DescribeMatcher(const M& matcher, bool negation = false) {
::std::stringstream ss;
Matcher<T> monomorphic_matcher = SafeMatcherCast<T>(matcher);
if (negation) {
monomorphic_matcher.DescribeNegationTo(&ss);
} else {
monomorphic_matcher.DescribeTo(&ss);
}
return ss.str();
}
#if GTEST_LANG_CXX11
// Define variadic matcher versions. They are overloaded in
// gmock-generated-matchers.h for the cases supported by pre C++11 compilers.
template <typename... Args>
internal::AllOfMatcher<typename std::decay<const Args&>::type...> AllOf(
const Args&... matchers) {
return internal::AllOfMatcher<typename std::decay<const Args&>::type...>(
matchers...);
}
template <typename... Args>
internal::AnyOfMatcher<typename std::decay<const Args&>::type...> AnyOf(
const Args&... matchers) {
return internal::AnyOfMatcher<typename std::decay<const Args&>::type...>(
matchers...);
}
template <typename... Args>
internal::ElementsAreMatcher<tuple<typename std::decay<const Args&>::type...>>
ElementsAre(const Args&... matchers) {
return internal::ElementsAreMatcher<
tuple<typename std::decay<const Args&>::type...>>(
make_tuple(matchers...));
}
template <typename... Args>
internal::UnorderedElementsAreMatcher<
tuple<typename std::decay<const Args&>::type...>>
UnorderedElementsAre(const Args&... matchers) {
return internal::UnorderedElementsAreMatcher<
tuple<typename std::decay<const Args&>::type...>>(
make_tuple(matchers...));
}
#endif // GTEST_LANG_CXX11
// AllArgs(m) is a synonym of m. This is useful in
//
// EXPECT_CALL(foo, Bar(_, _)).With(AllArgs(Eq()));
//
// which is easier to read than
//
// EXPECT_CALL(foo, Bar(_, _)).With(Eq());
template <typename InnerMatcher>
inline InnerMatcher AllArgs(const InnerMatcher& matcher) { return matcher; }
// Returns a matcher that matches the value of an optional<> type variable.
// The matcher implementation only uses '!arg' and requires that the optional<>
// type has a 'value_type' member type and that '*arg' is of type 'value_type'
// and is printable using 'PrintToString'. It is compatible with
// std::optional/std::experimental::optional.
// Note that to compare an optional type variable against nullopt you should
// use Eq(nullopt) and not Optional(Eq(nullopt)). The latter implies that the
// optional value contains an optional itself.
template <typename ValueMatcher>
inline internal::OptionalMatcher<ValueMatcher> Optional(
const ValueMatcher& value_matcher) {
return internal::OptionalMatcher<ValueMatcher>(value_matcher);
}
// Returns a matcher that matches the value of a absl::any type variable.
template <typename T>
PolymorphicMatcher<internal::any_cast_matcher::AnyCastMatcher<T> > AnyWith(
const Matcher<const T&>& matcher) {
return MakePolymorphicMatcher(
internal::any_cast_matcher::AnyCastMatcher<T>(matcher));
}
// Returns a matcher that matches the value of a variant<> type variable.
// The matcher implementation uses ADL to find the holds_alternative and get
// functions.
// It is compatible with std::variant.
template <typename T>
PolymorphicMatcher<internal::variant_matcher::VariantMatcher<T> > VariantWith(
const Matcher<const T&>& matcher) {
return MakePolymorphicMatcher(
internal::variant_matcher::VariantMatcher<T>(matcher));
}
// These macros allow using matchers to check values in Google Test
// tests. ASSERT_THAT(value, matcher) and EXPECT_THAT(value, matcher)
// succeed iff the value matches the matcher. If the assertion fails,
// the value and the description of the matcher will be printed.
#define ASSERT_THAT(value, matcher) ASSERT_PRED_FORMAT1(\
::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
#define EXPECT_THAT(value, matcher) EXPECT_PRED_FORMAT1(\
::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
} // namespace testing
GTEST_DISABLE_MSC_WARNINGS_POP_() // 4251
// Include any custom callback matchers added by the local installation.
// We must include this header at the end to make sure it can use the
// declarations from this file.
#include "gmock/internal/custom/gmock-matchers.h"
#endif // GMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_