// Copyright 2007, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Google Mock - a framework for writing C++ mock classes.
//
// This file implements the ON_CALL() and EXPECT_CALL() macros.
//
// A user can use the ON_CALL() macro to specify the default action of
// a mock method. The syntax is:
//
// ON_CALL(mock_object, Method(argument-matchers))
// .With(multi-argument-matcher)
// .WillByDefault(action);
//
// where the .With() clause is optional.
//
// A user can use the EXPECT_CALL() macro to specify an expectation on
// a mock method. The syntax is:
//
// EXPECT_CALL(mock_object, Method(argument-matchers))
// .With(multi-argument-matchers)
// .Times(cardinality)
// .InSequence(sequences)
// .After(expectations)
// .WillOnce(action)
// .WillRepeatedly(action)
// .RetiresOnSaturation();
//
// where all clauses are optional, and .InSequence()/.After()/
// .WillOnce() can appear any number of times.
// GOOGLETEST_CM0002 DO NOT DELETE
#ifndef GMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
#define GMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
#include <map>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include "gmock/gmock-actions.h"
#include "gmock/gmock-cardinalities.h"
#include "gmock/gmock-matchers.h"
#include "gmock/internal/gmock-internal-utils.h"
#include "gmock/internal/gmock-port.h"
#include "gtest/gtest.h"
#if GTEST_HAS_EXCEPTIONS
# include <stdexcept> // NOLINT
#endif
GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
/* class A needs to have dll-interface to be used by clients of class B */)
namespace testing {
// An abstract handle of an expectation.
class Expectation;
// A set of expectation handles.
class ExpectationSet;
// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
// and MUST NOT BE USED IN USER CODE!!!
namespace internal {
// Implements a mock function.
template <typename F> class FunctionMocker;
// Base class for expectations.
class ExpectationBase;
// Implements an expectation.
template <typename F> class TypedExpectation;
// Helper class for testing the Expectation class template.
class ExpectationTester;
// Base class for function mockers.
template <typename F> class FunctionMockerBase;
// Protects the mock object registry (in class Mock), all function
// mockers, and all expectations.
//
// The reason we don't use more fine-grained protection is: when a
// mock function Foo() is called, it needs to consult its expectations
// to see which one should be picked. If another thread is allowed to
// call a mock function (either Foo() or a different one) at the same
// time, it could affect the "retired" attributes of Foo()'s
// expectations when InSequence() is used, and thus affect which
// expectation gets picked. Therefore, we sequence all mock function
// calls to ensure the integrity of the mock objects' states.
GTEST_API_ GTEST_DECLARE_STATIC_MUTEX_(g_gmock_mutex);
// Untyped base class for ActionResultHolder<R>.
class UntypedActionResultHolderBase;
// Abstract base class of FunctionMockerBase. This is the
// type-agnostic part of the function mocker interface. Its pure
// virtual methods are implemented by FunctionMockerBase.
class GTEST_API_ UntypedFunctionMockerBase {
public:
UntypedFunctionMockerBase();
virtual ~UntypedFunctionMockerBase();
// Verifies that all expectations on this mock function have been
// satisfied. Reports one or more Google Test non-fatal failures
// and returns false if not.
bool VerifyAndClearExpectationsLocked()
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
// Clears the ON_CALL()s set on this mock function.
virtual void ClearDefaultActionsLocked()
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) = 0;
// In all of the following Untyped* functions, it's the caller's
// responsibility to guarantee the correctness of the arguments'
// types.
// Performs the default action with the given arguments and returns
// the action's result. The call description string will be used in
// the error message to describe the call in the case the default
// action fails.
// L = *
virtual UntypedActionResultHolderBase* UntypedPerformDefaultAction(
void* untyped_args, const std::string& call_description) const = 0;
// Performs the given action with the given arguments and returns
// the action's result.
// L = *
virtual UntypedActionResultHolderBase* UntypedPerformAction(
const void* untyped_action, void* untyped_args) const = 0;
// Writes a message that the call is uninteresting (i.e. neither
// explicitly expected nor explicitly unexpected) to the given
// ostream.
virtual void UntypedDescribeUninterestingCall(
const void* untyped_args,
::std::ostream* os) const
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
// Returns the expectation that matches the given function arguments
// (or NULL is there's no match); when a match is found,
// untyped_action is set to point to the action that should be
// performed (or NULL if the action is "do default"), and
// is_excessive is modified to indicate whether the call exceeds the
// expected number.
virtual const ExpectationBase* UntypedFindMatchingExpectation(
const void* untyped_args,
const void** untyped_action, bool* is_excessive,
::std::ostream* what, ::std::ostream* why)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
// Prints the given function arguments to the ostream.
virtual void UntypedPrintArgs(const void* untyped_args,
::std::ostream* os) const = 0;
// Sets the mock object this mock method belongs to, and registers
// this information in the global mock registry. Will be called
// whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
// method.
// FIXME: rename to SetAndRegisterOwner().
void RegisterOwner(const void* mock_obj)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
// Sets the mock object this mock method belongs to, and sets the
// name of the mock function. Will be called upon each invocation
// of this mock function.
void SetOwnerAndName(const void* mock_obj, const char* name)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
// Returns the mock object this mock method belongs to. Must be
// called after RegisterOwner() or SetOwnerAndName() has been
// called.
const void* MockObject() const
GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
// Returns the name of this mock method. Must be called after
// SetOwnerAndName() has been called.
const char* Name() const
GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
// Returns the result of invoking this mock function with the given
// arguments. This function can be safely called from multiple
// threads concurrently. The caller is responsible for deleting the
// result.
UntypedActionResultHolderBase* UntypedInvokeWith(void* untyped_args)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
protected:
typedef std::vector<const void*> UntypedOnCallSpecs;
typedef std::vector<internal::linked_ptr<ExpectationBase> >
UntypedExpectations;
// Returns an Expectation object that references and co-owns exp,
// which must be an expectation on this mock function.
Expectation GetHandleOf(ExpectationBase* exp);
// Address of the mock object this mock method belongs to. Only
// valid after this mock method has been called or
// ON_CALL/EXPECT_CALL has been invoked on it.
const void* mock_obj_; // Protected by g_gmock_mutex.
// Name of the function being mocked. Only valid after this mock
// method has been called.
const char* name_; // Protected by g_gmock_mutex.
// All default action specs for this function mocker.
UntypedOnCallSpecs untyped_on_call_specs_;
// All expectations for this function mocker.
//
// It's undefined behavior to interleave expectations (EXPECT_CALLs
// or ON_CALLs) and mock function calls. Also, the order of
// expectations is important. Therefore it's a logic race condition
// to read/write untyped_expectations_ concurrently. In order for
// tools like tsan to catch concurrent read/write accesses to
// untyped_expectations, we deliberately leave accesses to it
// unprotected.
UntypedExpectations untyped_expectations_;
}; // class UntypedFunctionMockerBase
// Untyped base class for OnCallSpec<F>.
class UntypedOnCallSpecBase {
public:
// The arguments are the location of the ON_CALL() statement.
UntypedOnCallSpecBase(const char* a_file, int a_line)
: file_(a_file), line_(a_line), last_clause_(kNone) {}
// Where in the source file was the default action spec defined?
const char* file() const { return file_; }
int line() const { return line_; }
protected:
// Gives each clause in the ON_CALL() statement a name.
enum Clause {
// Do not change the order of the enum members! The run-time
// syntax checking relies on it.
kNone,
kWith,
kWillByDefault
};
// Asserts that the ON_CALL() statement has a certain property.
void AssertSpecProperty(bool property,
const std::string& failure_message) const {
Assert(property, file_, line_, failure_message);
}
// Expects that the ON_CALL() statement has a certain property.
void ExpectSpecProperty(bool property,
const std::string& failure_message) const {
Expect(property, file_, line_, failure_message);
}
const char* file_;
int line_;
// The last clause in the ON_CALL() statement as seen so far.
// Initially kNone and changes as the statement is parsed.
Clause last_clause_;
}; // class UntypedOnCallSpecBase
// This template class implements an ON_CALL spec.
template <typename F>
class OnCallSpec : public UntypedOnCallSpecBase {
public:
typedef typename Function<F>::ArgumentTuple ArgumentTuple;
typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
// Constructs an OnCallSpec object from the information inside
// the parenthesis of an ON_CALL() statement.
OnCallSpec(const char* a_file, int a_line,
const ArgumentMatcherTuple& matchers)
: UntypedOnCallSpecBase(a_file, a_line),
matchers_(matchers),
// By default, extra_matcher_ should match anything. However,
// we cannot initialize it with _ as that triggers a compiler
// bug in Symbian's C++ compiler (cannot decide between two
// overloaded constructors of Matcher<const ArgumentTuple&>).
extra_matcher_(A<const ArgumentTuple&>()) {
}
// Implements the .With() clause.
OnCallSpec& With(const Matcher<const ArgumentTuple&>& m) {
// Makes sure this is called at most once.
ExpectSpecProperty(last_clause_ < kWith,
".With() cannot appear "
"more than once in an ON_CALL().");
last_clause_ = kWith;
extra_matcher_ = m;
return *this;
}
// Implements the .WillByDefault() clause.
OnCallSpec& WillByDefault(const Action<F>& action) {
ExpectSpecProperty(last_clause_ < kWillByDefault,
".WillByDefault() must appear "
"exactly once in an ON_CALL().");
last_clause_ = kWillByDefault;
ExpectSpecProperty(!action.IsDoDefault(),
"DoDefault() cannot be used in ON_CALL().");
action_ = action;
return *this;
}
// Returns true iff the given arguments match the matchers.
bool Matches(const ArgumentTuple& args) const {
return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
}
// Returns the action specified by the user.
const Action<F>& GetAction() const {
AssertSpecProperty(last_clause_ == kWillByDefault,
".WillByDefault() must appear exactly "
"once in an ON_CALL().");
return action_;
}
private:
// The information in statement
//
// ON_CALL(mock_object, Method(matchers))
// .With(multi-argument-matcher)
// .WillByDefault(action);
//
// is recorded in the data members like this:
//
// source file that contains the statement => file_
// line number of the statement => line_
// matchers => matchers_
// multi-argument-matcher => extra_matcher_
// action => action_
ArgumentMatcherTuple matchers_;
Matcher<const ArgumentTuple&> extra_matcher_;
Action<F> action_;
}; // class OnCallSpec
// Possible reactions on uninteresting calls.
enum CallReaction {
kAllow,
kWarn,
kFail,
};
} // namespace internal
// Utilities for manipulating mock objects.
class GTEST_API_ Mock {
public:
// The following public methods can be called concurrently.
// Tells Google Mock to ignore mock_obj when checking for leaked
// mock objects.
static void AllowLeak(const void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Verifies and clears all expectations on the given mock object.
// If the expectations aren't satisfied, generates one or more
// Google Test non-fatal failures and returns false.
static bool VerifyAndClearExpectations(void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Verifies all expectations on the given mock object and clears its
// default actions and expectations. Returns true iff the
// verification was successful.
static bool VerifyAndClear(void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
private:
friend class internal::UntypedFunctionMockerBase;
// Needed for a function mocker to register itself (so that we know
// how to clear a mock object).
template <typename F>
friend class internal::FunctionMockerBase;
template <typename M>
friend class NiceMock;
template <typename M>
friend class NaggyMock;
template <typename M>
friend class StrictMock;
// Tells Google Mock to allow uninteresting calls on the given mock
// object.
static void AllowUninterestingCalls(const void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Tells Google Mock to warn the user about uninteresting calls on
// the given mock object.
static void WarnUninterestingCalls(const void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Tells Google Mock to fail uninteresting calls on the given mock
// object.
static void FailUninterestingCalls(const void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Tells Google Mock the given mock object is being destroyed and
// its entry in the call-reaction table should be removed.
static void UnregisterCallReaction(const void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Returns the reaction Google Mock will have on uninteresting calls
// made on the given mock object.
static internal::CallReaction GetReactionOnUninterestingCalls(
const void* mock_obj)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Verifies that all expectations on the given mock object have been
// satisfied. Reports one or more Google Test non-fatal failures
// and returns false if not.
static bool VerifyAndClearExpectationsLocked(void* mock_obj)
GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
// Clears all ON_CALL()s set on the given mock object.
static void ClearDefaultActionsLocked(void* mock_obj)
GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
// Registers a mock object and a mock method it owns.
static void Register(
const void* mock_obj,
internal::UntypedFunctionMockerBase* mocker)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Tells Google Mock where in the source code mock_obj is used in an
// ON_CALL or EXPECT_CALL. In case mock_obj is leaked, this
// information helps the user identify which object it is.
static void RegisterUseByOnCallOrExpectCall(
const void* mock_obj, const char* file, int line)
GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
// Unregisters a mock method; removes the owning mock object from
// the registry when the last mock method associated with it has
// been unregistered. This is called only in the destructor of
// FunctionMockerBase.
static void UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
}; // class Mock
// An abstract handle of an expectation. Useful in the .After()
// clause of EXPECT_CALL() for setting the (partial) order of
// expectations. The syntax:
//
// Expectation e1 = EXPECT_CALL(...)...;
// EXPECT_CALL(...).After(e1)...;
//
// sets two expectations where the latter can only be matched after
// the former has been satisfied.
//
// Notes:
// - This class is copyable and has value semantics.
// - Constness is shallow: a const Expectation object itself cannot
// be modified, but the mutable methods of the ExpectationBase
// object it references can be called via expectation_base().
// - The constructors and destructor are defined out-of-line because
// the Symbian WINSCW compiler wants to otherwise instantiate them
// when it sees this class definition, at which point it doesn't have
// ExpectationBase available yet, leading to incorrect destruction
// in the linked_ptr (or compilation errors if using a checking
// linked_ptr).
class GTEST_API_ Expectation {
public:
// Constructs a null object that doesn't reference any expectation.
Expectation();
~Expectation();
// This single-argument ctor must not be explicit, in order to support the
// Expectation e = EXPECT_CALL(...);
// syntax.
//
// A TypedExpectation object stores its pre-requisites as
// Expectation objects, and needs to call the non-const Retire()
// method on the ExpectationBase objects they reference. Therefore
// Expectation must receive a *non-const* reference to the
// ExpectationBase object.
Expectation(internal::ExpectationBase& exp); // NOLINT
// The compiler-generated copy ctor and operator= work exactly as
// intended, so we don't need to define our own.
// Returns true iff rhs references the same expectation as this object does.
bool operator==(const Expectation& rhs) const {
return expectation_base_ == rhs.expectation_base_;
}
bool operator!=(const Expectation& rhs) const { return !(*this == rhs); }
private:
friend class ExpectationSet;
friend class Sequence;
friend class ::testing::internal::ExpectationBase;
friend class ::testing::internal::UntypedFunctionMockerBase;
template <typename F>
friend class ::testing::internal::FunctionMockerBase;
template <typename F>
friend class ::testing::internal::TypedExpectation;
// This comparator is needed for putting Expectation objects into a set.
class Less {
public:
bool operator()(const Expectation& lhs, const Expectation& rhs) const {
return lhs.expectation_base_.get() < rhs.expectation_base_.get();
}
};
typedef ::std::set<Expectation, Less> Set;
Expectation(
const internal::linked_ptr<internal::ExpectationBase>& expectation_base);
// Returns the expectation this object references.
const internal::linked_ptr<internal::ExpectationBase>&
expectation_base() const {
return expectation_base_;
}
// A linked_ptr that co-owns the expectation this handle references.
internal::linked_ptr<internal::ExpectationBase> expectation_base_;
};
// A set of expectation handles. Useful in the .After() clause of
// EXPECT_CALL() for setting the (partial) order of expectations. The
// syntax:
//
// ExpectationSet es;
// es += EXPECT_CALL(...)...;
// es += EXPECT_CALL(...)...;
// EXPECT_CALL(...).After(es)...;
//
// sets three expectations where the last one can only be matched
// after the first two have both been satisfied.
//
// This class is copyable and has value semantics.
class ExpectationSet {
public:
// A bidirectional iterator that can read a const element in the set.
typedef Expectation::Set::const_iterator const_iterator;
// An object stored in the set. This is an alias of Expectation.
typedef Expectation::Set::value_type value_type;
// Constructs an empty set.
ExpectationSet() {}
// This single-argument ctor must not be explicit, in order to support the
// ExpectationSet es = EXPECT_CALL(...);
// syntax.
ExpectationSet(internal::ExpectationBase& exp) { // NOLINT
*this += Expectation(exp);
}
// This single-argument ctor implements implicit conversion from
// Expectation and thus must not be explicit. This allows either an
// Expectation or an ExpectationSet to be used in .After().
ExpectationSet(const Expectation& e) { // NOLINT
*this += e;
}
// The compiler-generator ctor and operator= works exactly as
// intended, so we don't need to define our own.
// Returns true iff rhs contains the same set of Expectation objects
// as this does.
bool operator==(const ExpectationSet& rhs) const {
return expectations_ == rhs.expectations_;
}
bool operator!=(const ExpectationSet& rhs) const { return !(*this == rhs); }
// Implements the syntax
// expectation_set += EXPECT_CALL(...);
ExpectationSet& operator+=(const Expectation& e) {
expectations_.insert(e);
return *this;
}
int size() const { return static_cast<int>(expectations_.size()); }
const_iterator begin() const { return expectations_.begin(); }
const_iterator end() const { return expectations_.end(); }
private:
Expectation::Set expectations_;
};
// Sequence objects are used by a user to specify the relative order
// in which the expectations should match. They are copyable (we rely
// on the compiler-defined copy constructor and assignment operator).
class GTEST_API_ Sequence {
public:
// Constructs an empty sequence.
Sequence() : last_expectation_(new Expectation) {}
// Adds an expectation to this sequence. The caller must ensure
// that no other thread is accessing this Sequence object.
void AddExpectation(const Expectation& expectation) const;
private:
// The last expectation in this sequence. We use a linked_ptr here
// because Sequence objects are copyable and we want the copies to
// be aliases. The linked_ptr allows the copies to co-own and share
// the same Expectation object.
internal::linked_ptr<Expectation> last_expectation_;
}; // class Sequence
// An object of this type causes all EXPECT_CALL() statements
// encountered in its scope to be put in an anonymous sequence. The
// work is done in the constructor and destructor. You should only
// create an InSequence object on the stack.
//
// The sole purpose for this class is to support easy definition of
// sequential expectations, e.g.
//
// {
// InSequence dummy; // The name of the object doesn't matter.
//
// // The following expectations must match in the order they appear.
// EXPECT_CALL(a, Bar())...;
// EXPECT_CALL(a, Baz())...;
// ...
// EXPECT_CALL(b, Xyz())...;
// }
//
// You can create InSequence objects in multiple threads, as long as
// they are used to affect different mock objects. The idea is that
// each thread can create and set up its own mocks as if it's the only
// thread. However, for clarity of your tests we recommend you to set
// up mocks in the main thread unless you have a good reason not to do
// so.
class GTEST_API_ InSequence {
public:
InSequence();
~InSequence();
private:
bool sequence_created_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(InSequence); // NOLINT
} GTEST_ATTRIBUTE_UNUSED_;
namespace internal {
// Points to the implicit sequence introduced by a living InSequence
// object (if any) in the current thread or NULL.
GTEST_API_ extern ThreadLocal<Sequence*> g_gmock_implicit_sequence;
// Base class for implementing expectations.
//
// There are two reasons for having a type-agnostic base class for
// Expectation:
//
// 1. We need to store collections of expectations of different
// types (e.g. all pre-requisites of a particular expectation, all
// expectations in a sequence). Therefore these expectation objects
// must share a common base class.
//
// 2. We can avoid binary code bloat by moving methods not depending
// on the template argument of Expectation to the base class.
//
// This class is internal and mustn't be used by user code directly.
class GTEST_API_ ExpectationBase {
public:
// source_text is the EXPECT_CALL(...) source that created this Expectation.
ExpectationBase(const char* file, int line, const std::string& source_text);
virtual ~ExpectationBase();
// Where in the source file was the expectation spec defined?
const char* file() const { return file_; }
int line() const { return line_; }
const char* source_text() const { return source_text_.c_str(); }
// Returns the cardinality specified in the expectation spec.
const Cardinality& cardinality() const { return cardinality_; }
// Describes the source file location of this expectation.
void DescribeLocationTo(::std::ostream* os) const {
*os << FormatFileLocation(file(), line()) << " ";
}
// Describes how many times a function call matching this
// expectation has occurred.
void DescribeCallCountTo(::std::ostream* os) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
// If this mock method has an extra matcher (i.e. .With(matcher)),
// describes it to the ostream.
virtual void MaybeDescribeExtraMatcherTo(::std::ostream* os) = 0;
protected:
friend class ::testing::Expectation;
friend class UntypedFunctionMockerBase;
enum Clause {
// Don't change the order of the enum members!
kNone,
kWith,
kTimes,
kInSequence,
kAfter,
kWillOnce,
kWillRepeatedly,
kRetiresOnSaturation
};
typedef std::vector<const void*> UntypedActions;
// Returns an Expectation object that references and co-owns this
// expectation.
virtual Expectation GetHandle() = 0;
// Asserts that the EXPECT_CALL() statement has the given property.
void AssertSpecProperty(bool property,
const std::string& failure_message) const {
Assert(property, file_, line_, failure_message);
}
// Expects that the EXPECT_CALL() statement has the given property.
void ExpectSpecProperty(bool property,
const std::string& failure_message) const {
Expect(property, file_, line_, failure_message);
}
// Explicitly specifies the cardinality of this expectation. Used
// by the subclasses to implement the .Times() clause.
void SpecifyCardinality(const Cardinality& cardinality);
// Returns true iff the user specified the cardinality explicitly
// using a .Times().
bool cardinality_specified() const { return cardinality_specified_; }
// Sets the cardinality of this expectation spec.
void set_cardinality(const Cardinality& a_cardinality) {
cardinality_ = a_cardinality;
}
// The following group of methods should only be called after the
// EXPECT_CALL() statement, and only when g_gmock_mutex is held by
// the current thread.
// Retires all pre-requisites of this expectation.
void RetireAllPreRequisites()
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
// Returns true iff this expectation is retired.
bool is_retired() const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
return retired_;
}
// Retires this expectation.
void Retire()
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
retired_ = true;
}
// Returns true iff this expectation is satisfied.
bool IsSatisfied() const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
return cardinality().IsSatisfiedByCallCount(call_count_);
}
// Returns true iff this expectation is saturated.
bool IsSaturated() const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
return cardinality().IsSaturatedByCallCount(call_count_);
}
// Returns true iff this expectation is over-saturated.
bool IsOverSaturated() const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
return cardinality().IsOverSaturatedByCallCount(call_count_);
}
// Returns true iff all pre-requisites of this expectation are satisfied.
bool AllPrerequisitesAreSatisfied() const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
// Adds unsatisfied pre-requisites of this expectation to 'result'.
void FindUnsatisfiedPrerequisites(ExpectationSet* result) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
// Returns the number this expectation has been invoked.
int call_count() const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
return call_count_;
}
// Increments the number this expectation has been invoked.
void IncrementCallCount()
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
call_count_++;
}
// Checks the action count (i.e. the number of WillOnce() and
// WillRepeatedly() clauses) against the cardinality if this hasn't
// been done before. Prints a warning if there are too many or too
// few actions.
void CheckActionCountIfNotDone() const
GTEST_LOCK_EXCLUDED_(mutex_);
friend class ::testing::Sequence;
friend class ::testing::internal::ExpectationTester;
template <typename Function>
friend class TypedExpectation;
// Implements the .Times() clause.
void UntypedTimes(const Cardinality& a_cardinality);
// This group of fields are part of the spec and won't change after
// an EXPECT_CALL() statement finishes.
const char* file_; // The file that contains the expectation.
int line_; // The line number of the expectation.
const std::string source_text_; // The EXPECT_CALL(...) source text.
// True iff the cardinality is specified explicitly.
bool cardinality_specified_;
Cardinality cardinality_; // The cardinality of the expectation.
// The immediate pre-requisites (i.e. expectations that must be
// satisfied before this expectation can be matched) of this
// expectation. We use linked_ptr in the set because we want an
// Expectation object to be co-owned by its FunctionMocker and its
// successors. This allows multiple mock objects to be deleted at
// different times.
ExpectationSet immediate_prerequisites_;
// This group of fields are the current state of the expectation,
// and can change as the mock function is called.
int call_count_; // How many times this expectation has been invoked.
bool retired_; // True iff this expectation has retired.
UntypedActions untyped_actions_;
bool extra_matcher_specified_;
bool repeated_action_specified_; // True if a WillRepeatedly() was specified.
bool retires_on_saturation_;
Clause last_clause_;
mutable bool action_count_checked_; // Under mutex_.
mutable Mutex mutex_; // Protects action_count_checked_.
GTEST_DISALLOW_ASSIGN_(ExpectationBase);
}; // class ExpectationBase
// Impements an expectation for the given function type.
template <typename F>
class TypedExpectation : public ExpectationBase {
public:
typedef typename Function<F>::ArgumentTuple ArgumentTuple;
typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
typedef typename Function<F>::Result Result;
TypedExpectation(FunctionMockerBase<F>* owner, const char* a_file, int a_line,
const std::string& a_source_text,
const ArgumentMatcherTuple& m)
: ExpectationBase(a_file, a_line, a_source_text),
owner_(owner),
matchers_(m),
// By default, extra_matcher_ should match anything. However,
// we cannot initialize it with _ as that triggers a compiler
// bug in Symbian's C++ compiler (cannot decide between two
// overloaded constructors of Matcher<const ArgumentTuple&>).
extra_matcher_(A<const ArgumentTuple&>()),
repeated_action_(DoDefault()) {}
virtual ~TypedExpectation() {
// Check the validity of the action count if it hasn't been done
// yet (for example, if the expectation was never used).
CheckActionCountIfNotDone();
for (UntypedActions::const_iterator it = untyped_actions_.begin();
it != untyped_actions_.end(); ++it) {
delete static_cast<const Action<F>*>(*it);
}
}
// Implements the .With() clause.
TypedExpectation& With(const Matcher<const ArgumentTuple&>& m) {
if (last_clause_ == kWith) {
ExpectSpecProperty(false,
".With() cannot appear "
"more than once in an EXPECT_CALL().");
} else {
ExpectSpecProperty(last_clause_ < kWith,
".With() must be the first "
"clause in an EXPECT_CALL().");
}
last_clause_ = kWith;
extra_matcher_ = m;
extra_matcher_specified_ = true;
return *this;
}
// Implements the .Times() clause.
TypedExpectation& Times(const Cardinality& a_cardinality) {
ExpectationBase::UntypedTimes(a_cardinality);
return *this;
}
// Implements the .Times() clause.
TypedExpectation& Times(int n) {
return Times(Exactly(n));
}
// Implements the .InSequence() clause.
TypedExpectation& InSequence(const Sequence& s) {
ExpectSpecProperty(last_clause_ <= kInSequence,
".InSequence() cannot appear after .After(),"
" .WillOnce(), .WillRepeatedly(), or "
".RetiresOnSaturation().");
last_clause_ = kInSequence;
s.AddExpectation(GetHandle());
return *this;
}
TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2) {
return InSequence(s1).InSequence(s2);
}
TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
const Sequence& s3) {
return InSequence(s1, s2).InSequence(s3);
}
TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
const Sequence& s3, const Sequence& s4) {
return InSequence(s1, s2, s3).InSequence(s4);
}
TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
const Sequence& s3, const Sequence& s4,
const Sequence& s5) {
return InSequence(s1, s2, s3, s4).InSequence(s5);
}
// Implements that .After() clause.
TypedExpectation& After(const ExpectationSet& s) {
ExpectSpecProperty(last_clause_ <= kAfter,
".After() cannot appear after .WillOnce(),"
" .WillRepeatedly(), or "
".RetiresOnSaturation().");
last_clause_ = kAfter;
for (ExpectationSet::const_iterator it = s.begin(); it != s.end(); ++it) {
immediate_prerequisites_ += *it;
}
return *this;
}
TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2) {
return After(s1).After(s2);
}
TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
const ExpectationSet& s3) {
return After(s1, s2).After(s3);
}
TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
const ExpectationSet& s3, const ExpectationSet& s4) {
return After(s1, s2, s3).After(s4);
}
TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
const ExpectationSet& s3, const ExpectationSet& s4,
const ExpectationSet& s5) {
return After(s1, s2, s3, s4).After(s5);
}
// Implements the .WillOnce() clause.
TypedExpectation& WillOnce(const Action<F>& action) {
ExpectSpecProperty(last_clause_ <= kWillOnce,
".WillOnce() cannot appear after "
".WillRepeatedly() or .RetiresOnSaturation().");
last_clause_ = kWillOnce;
untyped_actions_.push_back(new Action<F>(action));
if (!cardinality_specified()) {
set_cardinality(Exactly(static_cast<int>(untyped_actions_.size())));
}
return *this;
}
// Implements the .WillRepeatedly() clause.
TypedExpectation& WillRepeatedly(const Action<F>& action) {
if (last_clause_ == kWillRepeatedly) {
ExpectSpecProperty(false,
".WillRepeatedly() cannot appear "
"more than once in an EXPECT_CALL().");
} else {
ExpectSpecProperty(last_clause_ < kWillRepeatedly,
".WillRepeatedly() cannot appear "
"after .RetiresOnSaturation().");
}
last_clause_ = kWillRepeatedly;
repeated_action_specified_ = true;
repeated_action_ = action;
if (!cardinality_specified()) {
set_cardinality(AtLeast(static_cast<int>(untyped_actions_.size())));
}
// Now that no more action clauses can be specified, we check
// whether their count makes sense.
CheckActionCountIfNotDone();
return *this;
}
// Implements the .RetiresOnSaturation() clause.
TypedExpectation& RetiresOnSaturation() {
ExpectSpecProperty(last_clause_ < kRetiresOnSaturation,
".RetiresOnSaturation() cannot appear "
"more than once.");
last_clause_ = kRetiresOnSaturation;
retires_on_saturation_ = true;
// Now that no more action clauses can be specified, we check
// whether their count makes sense.
CheckActionCountIfNotDone();
return *this;
}
// Returns the matchers for the arguments as specified inside the
// EXPECT_CALL() macro.
const ArgumentMatcherTuple& matchers() const {
return matchers_;
}
// Returns the matcher specified by the .With() clause.
const Matcher<const ArgumentTuple&>& extra_matcher() const {
return extra_matcher_;
}
// Returns the action specified by the .WillRepeatedly() clause.
const Action<F>& repeated_action() const { return repeated_action_; }
// If this mock method has an extra matcher (i.e. .With(matcher)),
// describes it to the ostream.
virtual void MaybeDescribeExtraMatcherTo(::std::ostream* os) {
if (extra_matcher_specified_) {
*os << " Expected args: ";
extra_matcher_.DescribeTo(os);
*os << "\n";
}
}
private:
template <typename Function>
friend class FunctionMockerBase;
// Returns an Expectation object that references and co-owns this
// expectation.
virtual Expectation GetHandle() {
return owner_->GetHandleOf(this);
}
// The following methods will be called only after the EXPECT_CALL()
// statement finishes and when the current thread holds
// g_gmock_mutex.
// Returns true iff this expectation matches the given arguments.
bool Matches(const ArgumentTuple& args) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
}
// Returns true iff this expectation should handle the given arguments.
bool ShouldHandleArguments(const ArgumentTuple& args) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
// In case the action count wasn't checked when the expectation
// was defined (e.g. if this expectation has no WillRepeatedly()
// or RetiresOnSaturation() clause), we check it when the
// expectation is used for the first time.
CheckActionCountIfNotDone();
return !is_retired() && AllPrerequisitesAreSatisfied() && Matches(args);
}
// Describes the result of matching the arguments against this
// expectation to the given ostream.
void ExplainMatchResultTo(
const ArgumentTuple& args,
::std::ostream* os) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
if (is_retired()) {
*os << " Expected: the expectation is active\n"
<< " Actual: it is retired\n";
} else if (!Matches(args)) {
if (!TupleMatches(matchers_, args)) {
ExplainMatchFailureTupleTo(matchers_, args, os);
}
StringMatchResultListener listener;
if (!extra_matcher_.MatchAndExplain(args, &listener)) {
*os << " Expected args: ";
extra_matcher_.DescribeTo(os);
*os << "\n Actual: don't match";
internal::PrintIfNotEmpty(listener.str(), os);
*os << "\n";
}
} else if (!AllPrerequisitesAreSatisfied()) {
*os << " Expected: all pre-requisites are satisfied\n"
<< " Actual: the following immediate pre-requisites "
<< "are not satisfied:\n";
ExpectationSet unsatisfied_prereqs;
FindUnsatisfiedPrerequisites(&unsatisfied_prereqs);
int i = 0;
for (ExpectationSet::const_iterator it = unsatisfied_prereqs.begin();
it != unsatisfied_prereqs.end(); ++it) {
it->expectation_base()->DescribeLocationTo(os);
*os << "pre-requisite #" << i++ << "\n";
}
*os << " (end of pre-requisites)\n";
} else {
// This line is here just for completeness' sake. It will never
// be executed as currently the ExplainMatchResultTo() function
// is called only when the mock function call does NOT match the
// expectation.
*os << "The call matches the expectation.\n";
}
}
// Returns the action that should be taken for the current invocation.
const Action<F>& GetCurrentAction(
const FunctionMockerBase<F>* mocker,
const ArgumentTuple& args) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
const int count = call_count();
Assert(count >= 1, __FILE__, __LINE__,
"call_count() is <= 0 when GetCurrentAction() is "
"called - this should never happen.");
const int action_count = static_cast<int>(untyped_actions_.size());
if (action_count > 0 && !repeated_action_specified_ &&
count > action_count) {
// If there is at least one WillOnce() and no WillRepeatedly(),
// we warn the user when the WillOnce() clauses ran out.
::std::stringstream ss;
DescribeLocationTo(&ss);
ss << "Actions ran out in " << source_text() << "...\n"
<< "Called " << count << " times, but only "
<< action_count << " WillOnce()"
<< (action_count == 1 ? " is" : "s are") << " specified - ";
mocker->DescribeDefaultActionTo(args, &ss);
Log(kWarning, ss.str(), 1);
}
return count <= action_count ?
*static_cast<const Action<F>*>(untyped_actions_[count - 1]) :
repeated_action();
}
// Given the arguments of a mock function call, if the call will
// over-saturate this expectation, returns the default action;
// otherwise, returns the next action in this expectation. Also
// describes *what* happened to 'what', and explains *why* Google
// Mock does it to 'why'. This method is not const as it calls
// IncrementCallCount(). A return value of NULL means the default
// action.
const Action<F>* GetActionForArguments(
const FunctionMockerBase<F>* mocker,
const ArgumentTuple& args,
::std::ostream* what,
::std::ostream* why)
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
if (IsSaturated()) {
// We have an excessive call.
IncrementCallCount();
*what << "Mock function called more times than expected - ";
mocker->DescribeDefaultActionTo(args, what);
DescribeCallCountTo(why);
// FIXME: allow the user to control whether
// unexpected calls should fail immediately or continue using a
// flag --gmock_unexpected_calls_are_fatal.
return NULL;
}
IncrementCallCount();
RetireAllPreRequisites();
if (retires_on_saturation_ && IsSaturated()) {
Retire();
}
// Must be done after IncrementCount()!
*what << "Mock function call matches " << source_text() <<"...\n";
return &(GetCurrentAction(mocker, args));
}
// All the fields below won't change once the EXPECT_CALL()
// statement finishes.
FunctionMockerBase<F>* const owner_;
ArgumentMatcherTuple matchers_;
Matcher<const ArgumentTuple&> extra_matcher_;
Action<F> repeated_action_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(TypedExpectation);
}; // class TypedExpectation
// A MockSpec object is used by ON_CALL() or EXPECT_CALL() for
// specifying the default behavior of, or expectation on, a mock
// function.
// Note: class MockSpec really belongs to the ::testing namespace.
// However if we define it in ::testing, MSVC will complain when
// classes in ::testing::internal declare it as a friend class
// template. To workaround this compiler bug, we define MockSpec in
// ::testing::internal and import it into ::testing.
// Logs a message including file and line number information.
GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
const char* file, int line,
const std::string& message);
template <typename F>
class MockSpec {
public:
typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
typedef typename internal::Function<F>::ArgumentMatcherTuple
ArgumentMatcherTuple;
// Constructs a MockSpec object, given the function mocker object
// that the spec is associated with.
MockSpec(internal::FunctionMockerBase<F>* function_mocker,
const ArgumentMatcherTuple& matchers)
: function_mocker_(function_mocker), matchers_(matchers) {}
// Adds a new default action spec to the function mocker and returns
// the newly created spec.
internal::OnCallSpec<F>& InternalDefaultActionSetAt(
const char* file, int line, const char* obj, const char* call) {
LogWithLocation(internal::kInfo, file, line,
std::string("ON_CALL(") + obj + ", " + call + ") invoked");
return function_mocker_->AddNewOnCallSpec(file, line, matchers_);
}
// Adds a new expectation spec to the function mocker and returns
// the newly created spec.
internal::TypedExpectation<F>& InternalExpectedAt(
const char* file, int line, const char* obj, const char* call) {
const std::string source_text(std::string("EXPECT_CALL(") + obj + ", " +
call + ")");
LogWithLocation(internal::kInfo, file, line, source_text + " invoked");
return function_mocker_->AddNewExpectation(
file, line, source_text, matchers_);
}
// This operator overload is used to swallow the superfluous parameter list
// introduced by the ON/EXPECT_CALL macros. See the macro comments for more
// explanation.
MockSpec<F>& operator()(const internal::WithoutMatchers&, void* const) {
return *this;
}
private:
template <typename Function>
friend class internal::FunctionMocker;
// The function mocker that owns this spec.
internal::FunctionMockerBase<F>* const function_mocker_;
// The argument matchers specified in the spec.
ArgumentMatcherTuple matchers_;
GTEST_DISALLOW_ASSIGN_(MockSpec);
}; // class MockSpec
// Wrapper type for generically holding an ordinary value or lvalue reference.
// If T is not a reference type, it must be copyable or movable.
// ReferenceOrValueWrapper<T> is movable, and will also be copyable unless
// T is a move-only value type (which means that it will always be copyable
// if the current platform does not support move semantics).
//
// The primary template defines handling for values, but function header
// comments describe the contract for the whole template (including
// specializations).
template <typename T>
class ReferenceOrValueWrapper {
public:
// Constructs a wrapper from the given value/reference.
explicit ReferenceOrValueWrapper(T value)
: value_(::testing::internal::move(value)) {
}
// Unwraps and returns the underlying value/reference, exactly as
// originally passed. The behavior of calling this more than once on
// the same object is unspecified.
T Unwrap() { return ::testing::internal::move(value_); }
// Provides nondestructive access to the underlying value/reference.
// Always returns a const reference (more precisely,
// const RemoveReference<T>&). The behavior of calling this after
// calling Unwrap on the same object is unspecified.
const T& Peek() const {
return value_;
}
private:
T value_;
};
// Specialization for lvalue reference types. See primary template
// for documentation.
template <typename T>
class ReferenceOrValueWrapper<T&> {
public:
// Workaround for debatable pass-by-reference lint warning (c-library-team
// policy precludes NOLINT in this context)
typedef T& reference;
explicit ReferenceOrValueWrapper(reference ref)
: value_ptr_(&ref) {}
T& Unwrap() { return *value_ptr_; }
const T& Peek() const { return *value_ptr_; }
private:
T* value_ptr_;
};
// MSVC warns about using 'this' in base member initializer list, so
// we need to temporarily disable the warning. We have to do it for
// the entire class to suppress the warning, even though it's about
// the constructor only.
GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355)
// C++ treats the void type specially. For example, you cannot define
// a void-typed variable or pass a void value to a function.
// ActionResultHolder<T> holds a value of type T, where T must be a
// copyable type or void (T doesn't need to be default-constructable).
// It hides the syntactic difference between void and other types, and
// is used to unify the code for invoking both void-returning and
// non-void-returning mock functions.
// Untyped base class for ActionResultHolder<T>.
class UntypedActionResultHolderBase {
public:
virtual ~UntypedActionResultHolderBase() {}
// Prints the held value as an action's result to os.
virtual void PrintAsActionResult(::std::ostream* os) const = 0;
};
// This generic definition is used when T is not void.
template <typename T>
class ActionResultHolder : public UntypedActionResultHolderBase {
public:
// Returns the held value. Must not be called more than once.
T Unwrap() {
return result_.Unwrap();
}
// Prints the held value as an action's result to os.
virtual void PrintAsActionResult(::std::ostream* os) const {
*os << "\n Returns: ";
// T may be a reference type, so we don't use UniversalPrint().
UniversalPrinter<T>::Print(result_.Peek(), os);
}
// Performs the given mock function's default action and returns the
// result in a new-ed ActionResultHolder.
template <typename F>
static ActionResultHolder* PerformDefaultAction(
const FunctionMockerBase<F>* func_mocker,
typename RvalueRef<typename Function<F>::ArgumentTuple>::type args,
const std::string& call_description) {
return new ActionResultHolder(Wrapper(func_mocker->PerformDefaultAction(
internal::move(args), call_description)));
}
// Performs the given action and returns the result in a new-ed
// ActionResultHolder.
template <typename F>
static ActionResultHolder* PerformAction(
const Action<F>& action,
typename RvalueRef<typename Function<F>::ArgumentTuple>::type args) {
return new ActionResultHolder(
Wrapper(action.Perform(internal::move(args))));
}
private:
typedef ReferenceOrValueWrapper<T> Wrapper;
explicit ActionResultHolder(Wrapper result)
: result_(::testing::internal::move(result)) {
}
Wrapper result_;
GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
};
// Specialization for T = void.
template <>
class ActionResultHolder<void> : public UntypedActionResultHolderBase {
public:
void Unwrap() { }
virtual void PrintAsActionResult(::std::ostream* /* os */) const {}
// Performs the given mock function's default action and returns ownership
// of an empty ActionResultHolder*.
template <typename F>
static ActionResultHolder* PerformDefaultAction(
const FunctionMockerBase<F>* func_mocker,
typename RvalueRef<typename Function<F>::ArgumentTuple>::type args,
const std::string& call_description) {
func_mocker->PerformDefaultAction(internal::move(args), call_description);
return new ActionResultHolder;
}
// Performs the given action and returns ownership of an empty
// ActionResultHolder*.
template <typename F>
static ActionResultHolder* PerformAction(
const Action<F>& action,
typename RvalueRef<typename Function<F>::ArgumentTuple>::type args) {
action.Perform(internal::move(args));
return new ActionResultHolder;
}
private:
ActionResultHolder() {}
GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
};
// The base of the function mocker class for the given function type.
// We put the methods in this class instead of its child to avoid code
// bloat.
template <typename F>
class FunctionMockerBase : public UntypedFunctionMockerBase {
public:
typedef typename Function<F>::Result Result;
typedef typename Function<F>::ArgumentTuple ArgumentTuple;
typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
FunctionMockerBase() {}
// The destructor verifies that all expectations on this mock
// function have been satisfied. If not, it will report Google Test
// non-fatal failures for the violations.
virtual ~FunctionMockerBase()
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
MutexLock l(&g_gmock_mutex);
VerifyAndClearExpectationsLocked();
Mock::UnregisterLocked(this);
ClearDefaultActionsLocked();
}
// Returns the ON_CALL spec that matches this mock function with the
// given arguments; returns NULL if no matching ON_CALL is found.
// L = *
const OnCallSpec<F>* FindOnCallSpec(
const ArgumentTuple& args) const {
for (UntypedOnCallSpecs::const_reverse_iterator it
= untyped_on_call_specs_.rbegin();
it != untyped_on_call_specs_.rend(); ++it) {
const OnCallSpec<F>* spec = static_cast<const OnCallSpec<F>*>(*it);
if (spec->Matches(args))
return spec;
}
return NULL;
}
// Performs the default action of this mock function on the given
// arguments and returns the result. Asserts (or throws if
// exceptions are enabled) with a helpful call descrption if there
// is no valid return value. This method doesn't depend on the
// mutable state of this object, and thus can be called concurrently
// without locking.
// L = *
Result PerformDefaultAction(
typename RvalueRef<typename Function<F>::ArgumentTuple>::type args,
const std::string& call_description) const {
const OnCallSpec<F>* const spec =
this->FindOnCallSpec(args);
if (spec != NULL) {
return spec->GetAction().Perform(internal::move(args));
}
const std::string message =
call_description +
"\n The mock function has no default action "
"set, and its return type has no default value set.";
#if GTEST_HAS_EXCEPTIONS
if (!DefaultValue<Result>::Exists()) {
throw std::runtime_error(message);
}
#else
Assert(DefaultValue<Result>::Exists(), "", -1, message);
#endif
return DefaultValue<Result>::Get();
}
// Performs the default action with the given arguments and returns
// the action's result. The call description string will be used in
// the error message to describe the call in the case the default
// action fails. The caller is responsible for deleting the result.
// L = *
virtual UntypedActionResultHolderBase* UntypedPerformDefaultAction(
void* untyped_args, // must point to an ArgumentTuple
const std::string& call_description) const {
ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
return ResultHolder::PerformDefaultAction(this, internal::move(*args),
call_description);
}
// Performs the given action with the given arguments and returns
// the action's result. The caller is responsible for deleting the
// result.
// L = *
virtual UntypedActionResultHolderBase* UntypedPerformAction(
const void* untyped_action, void* untyped_args) const {
// Make a copy of the action before performing it, in case the
// action deletes the mock object (and thus deletes itself).
const Action<F> action = *static_cast<const Action<F>*>(untyped_action);
ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
return ResultHolder::PerformAction(action, internal::move(*args));
}
// Implements UntypedFunctionMockerBase::ClearDefaultActionsLocked():
// clears the ON_CALL()s set on this mock function.
virtual void ClearDefaultActionsLocked()
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
// Deleting our default actions may trigger other mock objects to be
// deleted, for example if an action contains a reference counted smart
// pointer to that mock object, and that is the last reference. So if we
// delete our actions within the context of the global mutex we may deadlock
// when this method is called again. Instead, make a copy of the set of
// actions to delete, clear our set within the mutex, and then delete the
// actions outside of the mutex.
UntypedOnCallSpecs specs_to_delete;
untyped_on_call_specs_.swap(specs_to_delete);
g_gmock_mutex.Unlock();
for (UntypedOnCallSpecs::const_iterator it =
specs_to_delete.begin();
it != specs_to_delete.end(); ++it) {
delete static_cast<const OnCallSpec<F>*>(*it);
}
// Lock the mutex again, since the caller expects it to be locked when we
// return.
g_gmock_mutex.Lock();
}
protected:
template <typename Function>
friend class MockSpec;
typedef ActionResultHolder<Result> ResultHolder;
// Returns the result of invoking this mock function with the given
// arguments. This function can be safely called from multiple
// threads concurrently.
Result InvokeWith(
typename RvalueRef<typename Function<F>::ArgumentTuple>::type args)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
// const_cast is required since in C++98 we still pass ArgumentTuple around
// by const& instead of rvalue reference.
void* untyped_args = const_cast<void*>(static_cast<const void*>(&args));
scoped_ptr<ResultHolder> holder(
DownCast_<ResultHolder*>(this->UntypedInvokeWith(untyped_args)));
return holder->Unwrap();
}
// Adds and returns a default action spec for this mock function.
OnCallSpec<F>& AddNewOnCallSpec(
const char* file, int line,
const ArgumentMatcherTuple& m)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
OnCallSpec<F>* const on_call_spec = new OnCallSpec<F>(file, line, m);
untyped_on_call_specs_.push_back(on_call_spec);
return *on_call_spec;
}
// Adds and returns an expectation spec for this mock function.
TypedExpectation<F>& AddNewExpectation(const char* file, int line,
const std::string& source_text,
const ArgumentMatcherTuple& m)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
TypedExpectation<F>* const expectation =
new TypedExpectation<F>(this, file, line, source_text, m);
const linked_ptr<ExpectationBase> untyped_expectation(expectation);
// See the definition of untyped_expectations_ for why access to
// it is unprotected here.
untyped_expectations_.push_back(untyped_expectation);
// Adds this expectation into the implicit sequence if there is one.
Sequence* const implicit_sequence = g_gmock_implicit_sequence.get();
if (implicit_sequence != NULL) {
implicit_sequence->AddExpectation(Expectation(untyped_expectation));
}
return *expectation;
}
private:
template <typename Func> friend class TypedExpectation;
// Some utilities needed for implementing UntypedInvokeWith().
// Describes what default action will be performed for the given
// arguments.
// L = *
void DescribeDefaultActionTo(const ArgumentTuple& args,
::std::ostream* os) const {
const OnCallSpec<F>* const spec = FindOnCallSpec(args);
if (spec == NULL) {
*os << (internal::type_equals<Result, void>::value ?
"returning directly.\n" :
"returning default value.\n");
} else {
*os << "taking default action specified at:\n"
<< FormatFileLocation(spec->file(), spec->line()) << "\n";
}
}
// Writes a message that the call is uninteresting (i.e. neither
// explicitly expected nor explicitly unexpected) to the given
// ostream.
virtual void UntypedDescribeUninterestingCall(
const void* untyped_args,
::std::ostream* os) const
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
const ArgumentTuple& args =
*static_cast<const ArgumentTuple*>(untyped_args);
*os << "Uninteresting mock function call - ";
DescribeDefaultActionTo(args, os);
*os << " Function call: " << Name();
UniversalPrint(args, os);
}
// Returns the expectation that matches the given function arguments
// (or NULL is there's no match); when a match is found,
// untyped_action is set to point to the action that should be
// performed (or NULL if the action is "do default"), and
// is_excessive is modified to indicate whether the call exceeds the
// expected number.
//
// Critical section: We must find the matching expectation and the
// corresponding action that needs to be taken in an ATOMIC
// transaction. Otherwise another thread may call this mock
// method in the middle and mess up the state.
//
// However, performing the action has to be left out of the critical
// section. The reason is that we have no control on what the
// action does (it can invoke an arbitrary user function or even a
// mock function) and excessive locking could cause a dead lock.
virtual const ExpectationBase* UntypedFindMatchingExpectation(
const void* untyped_args,
const void** untyped_action, bool* is_excessive,
::std::ostream* what, ::std::ostream* why)
GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
const ArgumentTuple& args =
*static_cast<const ArgumentTuple*>(untyped_args);
MutexLock l(&g_gmock_mutex);
TypedExpectation<F>* exp = this->FindMatchingExpectationLocked(args);
if (exp == NULL) { // A match wasn't found.
this->FormatUnexpectedCallMessageLocked(args, what, why);
return NULL;
}
// This line must be done before calling GetActionForArguments(),
// which will increment the call count for *exp and thus affect
// its saturation status.
*is_excessive = exp->IsSaturated();
const Action<F>* action = exp->GetActionForArguments(this, args, what, why);
if (action != NULL && action->IsDoDefault())
action = NULL; // Normalize "do default" to NULL.
*untyped_action = action;
return exp;
}
// Prints the given function arguments to the ostream.
virtual void UntypedPrintArgs(const void* untyped_args,
::std::ostream* os) const {
const ArgumentTuple& args =
*static_cast<const ArgumentTuple*>(untyped_args);
UniversalPrint(args, os);
}
// Returns the expectation that matches the arguments, or NULL if no
// expectation matches them.
TypedExpectation<F>* FindMatchingExpectationLocked(
const ArgumentTuple& args) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
// See the definition of untyped_expectations_ for why access to
// it is unprotected here.
for (typename UntypedExpectations::const_reverse_iterator it =
untyped_expectations_.rbegin();
it != untyped_expectations_.rend(); ++it) {
TypedExpectation<F>* const exp =
static_cast<TypedExpectation<F>*>(it->get());
if (exp->ShouldHandleArguments(args)) {
return exp;
}
}
return NULL;
}
// Returns a message that the arguments don't match any expectation.
void FormatUnexpectedCallMessageLocked(
const ArgumentTuple& args,
::std::ostream* os,
::std::ostream* why) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
*os << "\nUnexpected mock function call - ";
DescribeDefaultActionTo(args, os);
PrintTriedExpectationsLocked(args, why);
}
// Prints a list of expectations that have been tried against the
// current mock function call.
void PrintTriedExpectationsLocked(
const ArgumentTuple& args,
::std::ostream* why) const
GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
g_gmock_mutex.AssertHeld();
const int count = static_cast<int>(untyped_expectations_.size());
*why << "Google Mock tried the following " << count << " "
<< (count == 1 ? "expectation, but it didn't match" :
"expectations, but none matched")
<< ":\n";
for (int i = 0; i < count; i++) {
TypedExpectation<F>* const expectation =
static_cast<TypedExpectation<F>*>(untyped_expectations_[i].get());
*why << "\n";
expectation->DescribeLocationTo(why);
if (count > 1) {
*why << "tried expectation #" << i << ": ";
}
*why << expectation->source_text() << "...\n";
expectation->ExplainMatchResultTo(args, why);
expectation->DescribeCallCountTo(why);
}
}
// There is no generally useful and implementable semantics of
// copying a mock object, so copying a mock is usually a user error.
// Thus we disallow copying function mockers. If the user really
// wants to copy a mock object, they should implement their own copy
// operation, for example:
//
// class MockFoo : public Foo {
// public:
// // Defines a copy constructor explicitly.
// MockFoo(const MockFoo& src) {}
// ...
// };
GTEST_DISALLOW_COPY_AND_ASSIGN_(FunctionMockerBase);
}; // class FunctionMockerBase
GTEST_DISABLE_MSC_WARNINGS_POP_() // 4355
// Implements methods of FunctionMockerBase.
// Verifies that all expectations on this mock function have been
// satisfied. Reports one or more Google Test non-fatal failures and
// returns false if not.
// Reports an uninteresting call (whose description is in msg) in the
// manner specified by 'reaction'.
void ReportUninterestingCall(CallReaction reaction, const std::string& msg);
} // namespace internal
// The style guide prohibits "using" statements in a namespace scope
// inside a header file. However, the MockSpec class template is
// meant to be defined in the ::testing namespace. The following line
// is just a trick for working around a bug in MSVC 8.0, which cannot
// handle it if we define MockSpec in ::testing.
using internal::MockSpec;
// Const(x) is a convenient function for obtaining a const reference
// to x. This is useful for setting expectations on an overloaded
// const mock method, e.g.
//
// class MockFoo : public FooInterface {
// public:
// MOCK_METHOD0(Bar, int());
// MOCK_CONST_METHOD0(Bar, int&());
// };
//
// MockFoo foo;
// // Expects a call to non-const MockFoo::Bar().
// EXPECT_CALL(foo, Bar());
// // Expects a call to const MockFoo::Bar().
// EXPECT_CALL(Const(foo), Bar());
template <typename T>
inline const T& Const(const T& x) { return x; }
// Constructs an Expectation object that references and co-owns exp.
inline Expectation::Expectation(internal::ExpectationBase& exp) // NOLINT
: expectation_base_(exp.GetHandle().expectation_base()) {}
} // namespace testing
GTEST_DISABLE_MSC_WARNINGS_POP_() // 4251
// Implementation for ON_CALL and EXPECT_CALL macros. A separate macro is
// required to avoid compile errors when the name of the method used in call is
// a result of macro expansion. See CompilesWithMethodNameExpandedFromMacro
// tests in internal/gmock-spec-builders_test.cc for more details.
//
// This macro supports statements both with and without parameter matchers. If
// the parameter list is omitted, gMock will accept any parameters, which allows
// tests to be written that don't need to encode the number of method
// parameter. This technique may only be used for non-overloaded methods.
//
// // These are the same:
// ON_CALL(mock, NoArgsMethod()).WillByDefault(...);
// ON_CALL(mock, NoArgsMethod).WillByDefault(...);
//
// // As are these:
// ON_CALL(mock, TwoArgsMethod(_, _)).WillByDefault(...);
// ON_CALL(mock, TwoArgsMethod).WillByDefault(...);
//
// // Can also specify args if you want, of course:
// ON_CALL(mock, TwoArgsMethod(_, 45)).WillByDefault(...);
//
// // Overloads work as long as you specify parameters:
// ON_CALL(mock, OverloadedMethod(_)).WillByDefault(...);
// ON_CALL(mock, OverloadedMethod(_, _)).WillByDefault(...);
//
// // Oops! Which overload did you want?
// ON_CALL(mock, OverloadedMethod).WillByDefault(...);
// => ERROR: call to member function 'gmock_OverloadedMethod' is ambiguous
//
// How this works: The mock class uses two overloads of the gmock_Method
// expectation setter method plus an operator() overload on the MockSpec object.
// In the matcher list form, the macro expands to:
//
// // This statement:
// ON_CALL(mock, TwoArgsMethod(_, 45))...
//
// // ...expands to:
// mock.gmock_TwoArgsMethod(_, 45)(WithoutMatchers(), nullptr)...
// |-------------v---------------||------------v-------------|
// invokes first overload swallowed by operator()
//
// // ...which is essentially:
// mock.gmock_TwoArgsMethod(_, 45)...
//
// Whereas the form without a matcher list:
//
// // This statement:
// ON_CALL(mock, TwoArgsMethod)...
//
// // ...expands to:
// mock.gmock_TwoArgsMethod(WithoutMatchers(), nullptr)...
// |-----------------------v--------------------------|
// invokes second overload
//
// // ...which is essentially:
// mock.gmock_TwoArgsMethod(_, _)...
//
// The WithoutMatchers() argument is used to disambiguate overloads and to
// block the caller from accidentally invoking the second overload directly. The
// second argument is an internal type derived from the method signature. The
// failure to disambiguate two overloads of this method in the ON_CALL statement
// is how we block callers from setting expectations on overloaded methods.
#define GMOCK_ON_CALL_IMPL_(mock_expr, Setter, call) \
((mock_expr).gmock_##call)(::testing::internal::GetWithoutMatchers(), NULL) \
.Setter(__FILE__, __LINE__, #mock_expr, #call)
#define ON_CALL(obj, call) \
GMOCK_ON_CALL_IMPL_(obj, InternalDefaultActionSetAt, call)
#define EXPECT_CALL(obj, call) \
GMOCK_ON_CALL_IMPL_(obj, InternalExpectedAt, call)
#endif // GMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_