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  1. // Copyright 2007, Google Inc.
  2. // All rights reserved.
  3. //
  4. // Redistribution and use in source and binary forms, with or without
  5. // modification, are permitted provided that the following conditions are
  6. // met:
  7. //
  8. //     * Redistributions of source code must retain the above copyright
  9. // notice, this list of conditions and the following disclaimer.
  10. //     * Redistributions in binary form must reproduce the above
  11. // copyright notice, this list of conditions and the following disclaimer
  12. // in the documentation and/or other materials provided with the
  13. // distribution.
  14. //     * Neither the name of Google Inc. nor the names of its
  15. // contributors may be used to endorse or promote products derived from
  16. // this software without specific prior written permission.
  17. //
  18. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21. // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22. // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23. // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24. // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25. // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26. // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27. // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28. // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29.  
  30.  
  31. // Google Mock - a framework for writing C++ mock classes.
  32. //
  33. // This file implements the spec builder syntax (ON_CALL and
  34. // EXPECT_CALL).
  35.  
  36. #include "gmock/gmock-spec-builders.h"
  37.  
  38. #include <stdlib.h>
  39. #include <iostream>  // NOLINT
  40. #include <map>
  41. #include <set>
  42. #include <string>
  43. #include <vector>
  44. #include "gmock/gmock.h"
  45. #include "gtest/gtest.h"
  46.  
  47. #if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
  48. # include <unistd.h>  // NOLINT
  49. #endif
  50.  
  51. // Silence C4800 (C4800: 'int *const ': forcing value
  52. // to bool 'true' or 'false') for MSVC 14,15
  53. #ifdef _MSC_VER
  54. #if _MSC_VER <= 1900
  55. #  pragma warning(push)
  56. #  pragma warning(disable:4800)
  57. #endif
  58. #endif
  59.  
  60. namespace testing {
  61. namespace internal {
  62.  
  63. // Protects the mock object registry (in class Mock), all function
  64. // mockers, and all expectations.
  65. GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_gmock_mutex);
  66.  
  67. // Logs a message including file and line number information.
  68. GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
  69.                                 const char* file, int line,
  70.                                 const std::string& message) {
  71.   ::std::ostringstream s;
  72.   s << file << ":" << line << ": " << message << ::std::endl;
  73.   Log(severity, s.str(), 0);
  74. }
  75.  
  76. // Constructs an ExpectationBase object.
  77. ExpectationBase::ExpectationBase(const char* a_file, int a_line,
  78.                                  const std::string& a_source_text)
  79.     : file_(a_file),
  80.       line_(a_line),
  81.       source_text_(a_source_text),
  82.       cardinality_specified_(false),
  83.       cardinality_(Exactly(1)),
  84.       call_count_(0),
  85.       retired_(false),
  86.       extra_matcher_specified_(false),
  87.       repeated_action_specified_(false),
  88.       retires_on_saturation_(false),
  89.       last_clause_(kNone),
  90.       action_count_checked_(false) {}
  91.  
  92. // Destructs an ExpectationBase object.
  93. ExpectationBase::~ExpectationBase() {}
  94.  
  95. // Explicitly specifies the cardinality of this expectation.  Used by
  96. // the subclasses to implement the .Times() clause.
  97. void ExpectationBase::SpecifyCardinality(const Cardinality& a_cardinality) {
  98.   cardinality_specified_ = true;
  99.   cardinality_ = a_cardinality;
  100. }
  101.  
  102. // Retires all pre-requisites of this expectation.
  103. void ExpectationBase::RetireAllPreRequisites()
  104.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  105.   if (is_retired()) {
  106.     // We can take this short-cut as we never retire an expectation
  107.     // until we have retired all its pre-requisites.
  108.     return;
  109.   }
  110.  
  111.   ::std::vector<ExpectationBase*> expectations(1, this);
  112.   while (!expectations.empty()) {
  113.     ExpectationBase* exp = expectations.back();
  114.     expectations.pop_back();
  115.  
  116.     for (ExpectationSet::const_iterator it =
  117.              exp->immediate_prerequisites_.begin();
  118.          it != exp->immediate_prerequisites_.end(); ++it) {
  119.       ExpectationBase* next = it->expectation_base().get();
  120.       if (!next->is_retired()) {
  121.         next->Retire();
  122.         expectations.push_back(next);
  123.       }
  124.     }
  125.   }
  126. }
  127.  
  128. // Returns true iff all pre-requisites of this expectation have been
  129. // satisfied.
  130. bool ExpectationBase::AllPrerequisitesAreSatisfied() const
  131.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  132.   g_gmock_mutex.AssertHeld();
  133.   ::std::vector<const ExpectationBase*> expectations(1, this);
  134.   while (!expectations.empty()) {
  135.     const ExpectationBase* exp = expectations.back();
  136.     expectations.pop_back();
  137.  
  138.     for (ExpectationSet::const_iterator it =
  139.              exp->immediate_prerequisites_.begin();
  140.          it != exp->immediate_prerequisites_.end(); ++it) {
  141.       const ExpectationBase* next = it->expectation_base().get();
  142.       if (!next->IsSatisfied()) return false;
  143.       expectations.push_back(next);
  144.     }
  145.   }
  146.   return true;
  147. }
  148.  
  149. // Adds unsatisfied pre-requisites of this expectation to 'result'.
  150. void ExpectationBase::FindUnsatisfiedPrerequisites(ExpectationSet* result) const
  151.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  152.   g_gmock_mutex.AssertHeld();
  153.   ::std::vector<const ExpectationBase*> expectations(1, this);
  154.   while (!expectations.empty()) {
  155.     const ExpectationBase* exp = expectations.back();
  156.     expectations.pop_back();
  157.  
  158.     for (ExpectationSet::const_iterator it =
  159.              exp->immediate_prerequisites_.begin();
  160.          it != exp->immediate_prerequisites_.end(); ++it) {
  161.       const ExpectationBase* next = it->expectation_base().get();
  162.  
  163.       if (next->IsSatisfied()) {
  164.         // If *it is satisfied and has a call count of 0, some of its
  165.         // pre-requisites may not be satisfied yet.
  166.         if (next->call_count_ == 0) {
  167.           expectations.push_back(next);
  168.         }
  169.       } else {
  170.         // Now that we know next is unsatisfied, we are not so interested
  171.         // in whether its pre-requisites are satisfied.  Therefore we
  172.         // don't iterate into it here.
  173.         *result += *it;
  174.       }
  175.     }
  176.   }
  177. }
  178.  
  179. // Describes how many times a function call matching this
  180. // expectation has occurred.
  181. void ExpectationBase::DescribeCallCountTo(::std::ostream* os) const
  182.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  183.   g_gmock_mutex.AssertHeld();
  184.  
  185.   // Describes how many times the function is expected to be called.
  186.   *os << "         Expected: to be ";
  187.   cardinality().DescribeTo(os);
  188.   *os << "\n           Actual: ";
  189.   Cardinality::DescribeActualCallCountTo(call_count(), os);
  190.  
  191.   // Describes the state of the expectation (e.g. is it satisfied?
  192.   // is it active?).
  193.   *os << " - " << (IsOverSaturated() ? "over-saturated" :
  194.                    IsSaturated() ? "saturated" :
  195.                    IsSatisfied() ? "satisfied" : "unsatisfied")
  196.       << " and "
  197.       << (is_retired() ? "retired" : "active");
  198. }
  199.  
  200. // Checks the action count (i.e. the number of WillOnce() and
  201. // WillRepeatedly() clauses) against the cardinality if this hasn't
  202. // been done before.  Prints a warning if there are too many or too
  203. // few actions.
  204. void ExpectationBase::CheckActionCountIfNotDone() const
  205.     GTEST_LOCK_EXCLUDED_(mutex_) {
  206.   bool should_check = false;
  207.   {
  208.     MutexLock l(&mutex_);
  209.     if (!action_count_checked_) {
  210.       action_count_checked_ = true;
  211.       should_check = true;
  212.     }
  213.   }
  214.  
  215.   if (should_check) {
  216.     if (!cardinality_specified_) {
  217.       // The cardinality was inferred - no need to check the action
  218.       // count against it.
  219.       return;
  220.     }
  221.  
  222.     // The cardinality was explicitly specified.
  223.     const int action_count = static_cast<int>(untyped_actions_.size());
  224.     const int upper_bound = cardinality().ConservativeUpperBound();
  225.     const int lower_bound = cardinality().ConservativeLowerBound();
  226.     bool too_many;  // True if there are too many actions, or false
  227.     // if there are too few.
  228.     if (action_count > upper_bound ||
  229.         (action_count == upper_bound && repeated_action_specified_)) {
  230.       too_many = true;
  231.     } else if (0 < action_count && action_count < lower_bound &&
  232.                !repeated_action_specified_) {
  233.       too_many = false;
  234.     } else {
  235.       return;
  236.     }
  237.  
  238.     ::std::stringstream ss;
  239.     DescribeLocationTo(&ss);
  240.     ss << "Too " << (too_many ? "many" : "few")
  241.        << " actions specified in " << source_text() << "...\n"
  242.        << "Expected to be ";
  243.     cardinality().DescribeTo(&ss);
  244.     ss << ", but has " << (too_many ? "" : "only ")
  245.        << action_count << " WillOnce()"
  246.        << (action_count == 1 ? "" : "s");
  247.     if (repeated_action_specified_) {
  248.       ss << " and a WillRepeatedly()";
  249.     }
  250.     ss << ".";
  251.     Log(kWarning, ss.str(), -1);  // -1 means "don't print stack trace".
  252.   }
  253. }
  254.  
  255. // Implements the .Times() clause.
  256. void ExpectationBase::UntypedTimes(const Cardinality& a_cardinality) {
  257.   if (last_clause_ == kTimes) {
  258.     ExpectSpecProperty(false,
  259.                        ".Times() cannot appear "
  260.                        "more than once in an EXPECT_CALL().");
  261.   } else {
  262.     ExpectSpecProperty(last_clause_ < kTimes,
  263.                        ".Times() cannot appear after "
  264.                        ".InSequence(), .WillOnce(), .WillRepeatedly(), "
  265.                        "or .RetiresOnSaturation().");
  266.   }
  267.   last_clause_ = kTimes;
  268.  
  269.   SpecifyCardinality(a_cardinality);
  270. }
  271.  
  272. // Points to the implicit sequence introduced by a living InSequence
  273. // object (if any) in the current thread or NULL.
  274. GTEST_API_ ThreadLocal<Sequence*> g_gmock_implicit_sequence;
  275.  
  276. // Reports an uninteresting call (whose description is in msg) in the
  277. // manner specified by 'reaction'.
  278. void ReportUninterestingCall(CallReaction reaction, const std::string& msg) {
  279.   // Include a stack trace only if --gmock_verbose=info is specified.
  280.   const int stack_frames_to_skip =
  281.       GMOCK_FLAG(verbose) == kInfoVerbosity ? 3 : -1;
  282.   switch (reaction) {
  283.     case kAllow:
  284.       Log(kInfo, msg, stack_frames_to_skip);
  285.       break;
  286.     case kWarn:
  287.       Log(kWarning,
  288.           msg +
  289.               "\nNOTE: You can safely ignore the above warning unless this "
  290.               "call should not happen.  Do not suppress it by blindly adding "
  291.               "an EXPECT_CALL() if you don't mean to enforce the call.  "
  292.               "See "
  293.               "https://github.com/google/googletest/blob/master/googlemock/"
  294.               "docs/CookBook.md#"
  295.               "knowing-when-to-expect for details.\n",
  296.           stack_frames_to_skip);
  297.       break;
  298.     default:  // FAIL
  299.       Expect(false, NULL, -1, msg);
  300.   }
  301. }
  302.  
  303. UntypedFunctionMockerBase::UntypedFunctionMockerBase()
  304.     : mock_obj_(NULL), name_("") {}
  305.  
  306. UntypedFunctionMockerBase::~UntypedFunctionMockerBase() {}
  307.  
  308. // Sets the mock object this mock method belongs to, and registers
  309. // this information in the global mock registry.  Will be called
  310. // whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
  311. // method.
  312. void UntypedFunctionMockerBase::RegisterOwner(const void* mock_obj)
  313.     GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  314.   {
  315.     MutexLock l(&g_gmock_mutex);
  316.     mock_obj_ = mock_obj;
  317.   }
  318.   Mock::Register(mock_obj, this);
  319. }
  320.  
  321. // Sets the mock object this mock method belongs to, and sets the name
  322. // of the mock function.  Will be called upon each invocation of this
  323. // mock function.
  324. void UntypedFunctionMockerBase::SetOwnerAndName(const void* mock_obj,
  325.                                                 const char* name)
  326.     GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  327.   // We protect name_ under g_gmock_mutex in case this mock function
  328.   // is called from two threads concurrently.
  329.   MutexLock l(&g_gmock_mutex);
  330.   mock_obj_ = mock_obj;
  331.   name_ = name;
  332. }
  333.  
  334. // Returns the name of the function being mocked.  Must be called
  335. // after RegisterOwner() or SetOwnerAndName() has been called.
  336. const void* UntypedFunctionMockerBase::MockObject() const
  337.     GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  338.   const void* mock_obj;
  339.   {
  340.     // We protect mock_obj_ under g_gmock_mutex in case this mock
  341.     // function is called from two threads concurrently.
  342.     MutexLock l(&g_gmock_mutex);
  343.     Assert(mock_obj_ != NULL, __FILE__, __LINE__,
  344.            "MockObject() must not be called before RegisterOwner() or "
  345.            "SetOwnerAndName() has been called.");
  346.     mock_obj = mock_obj_;
  347.   }
  348.   return mock_obj;
  349. }
  350.  
  351. // Returns the name of this mock method.  Must be called after
  352. // SetOwnerAndName() has been called.
  353. const char* UntypedFunctionMockerBase::Name() const
  354.     GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  355.   const char* name;
  356.   {
  357.     // We protect name_ under g_gmock_mutex in case this mock
  358.     // function is called from two threads concurrently.
  359.     MutexLock l(&g_gmock_mutex);
  360.     Assert(name_ != NULL, __FILE__, __LINE__,
  361.            "Name() must not be called before SetOwnerAndName() has "
  362.            "been called.");
  363.     name = name_;
  364.   }
  365.   return name;
  366. }
  367.  
  368. // Calculates the result of invoking this mock function with the given
  369. // arguments, prints it, and returns it.  The caller is responsible
  370. // for deleting the result.
  371. UntypedActionResultHolderBase* UntypedFunctionMockerBase::UntypedInvokeWith(
  372.     void* const untyped_args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  373.   // See the definition of untyped_expectations_ for why access to it
  374.   // is unprotected here.
  375.   if (untyped_expectations_.size() == 0) {
  376.     // No expectation is set on this mock method - we have an
  377.     // uninteresting call.
  378.  
  379.     // We must get Google Mock's reaction on uninteresting calls
  380.     // made on this mock object BEFORE performing the action,
  381.     // because the action may DELETE the mock object and make the
  382.     // following expression meaningless.
  383.     const CallReaction reaction =
  384.         Mock::GetReactionOnUninterestingCalls(MockObject());
  385.  
  386.     // True iff we need to print this call's arguments and return
  387.     // value.  This definition must be kept in sync with
  388.     // the behavior of ReportUninterestingCall().
  389.     const bool need_to_report_uninteresting_call =
  390.         // If the user allows this uninteresting call, we print it
  391.         // only when they want informational messages.
  392.         reaction == kAllow ? LogIsVisible(kInfo) :
  393.                            // If the user wants this to be a warning, we print
  394.                            // it only when they want to see warnings.
  395.             reaction == kWarn
  396.                 ? LogIsVisible(kWarning)
  397.                 :
  398.                 // Otherwise, the user wants this to be an error, and we
  399.                 // should always print detailed information in the error.
  400.                 true;
  401.  
  402.     if (!need_to_report_uninteresting_call) {
  403.       // Perform the action without printing the call information.
  404.       return this->UntypedPerformDefaultAction(
  405.           untyped_args, "Function call: " + std::string(Name()));
  406.     }
  407.  
  408.     // Warns about the uninteresting call.
  409.     ::std::stringstream ss;
  410.     this->UntypedDescribeUninterestingCall(untyped_args, &ss);
  411.  
  412.     // Calculates the function result.
  413.     UntypedActionResultHolderBase* const result =
  414.         this->UntypedPerformDefaultAction(untyped_args, ss.str());
  415.  
  416.     // Prints the function result.
  417.     if (result != NULL)
  418.       result->PrintAsActionResult(&ss);
  419.  
  420.     ReportUninterestingCall(reaction, ss.str());
  421.     return result;
  422.   }
  423.  
  424.   bool is_excessive = false;
  425.   ::std::stringstream ss;
  426.   ::std::stringstream why;
  427.   ::std::stringstream loc;
  428.   const void* untyped_action = NULL;
  429.  
  430.   // The UntypedFindMatchingExpectation() function acquires and
  431.   // releases g_gmock_mutex.
  432.   const ExpectationBase* const untyped_expectation =
  433.       this->UntypedFindMatchingExpectation(
  434.           untyped_args, &untyped_action, &is_excessive,
  435.           &ss, &why);
  436.   const bool found = untyped_expectation != NULL;
  437.  
  438.   // True iff we need to print the call's arguments and return value.
  439.   // This definition must be kept in sync with the uses of Expect()
  440.   // and Log() in this function.
  441.   const bool need_to_report_call =
  442.       !found || is_excessive || LogIsVisible(kInfo);
  443.   if (!need_to_report_call) {
  444.     // Perform the action without printing the call information.
  445.     return
  446.         untyped_action == NULL ?
  447.         this->UntypedPerformDefaultAction(untyped_args, "") :
  448.         this->UntypedPerformAction(untyped_action, untyped_args);
  449.   }
  450.  
  451.   ss << "    Function call: " << Name();
  452.   this->UntypedPrintArgs(untyped_args, &ss);
  453.  
  454.   // In case the action deletes a piece of the expectation, we
  455.   // generate the message beforehand.
  456.   if (found && !is_excessive) {
  457.     untyped_expectation->DescribeLocationTo(&loc);
  458.   }
  459.  
  460.   UntypedActionResultHolderBase* const result =
  461.       untyped_action == NULL ?
  462.       this->UntypedPerformDefaultAction(untyped_args, ss.str()) :
  463.       this->UntypedPerformAction(untyped_action, untyped_args);
  464.   if (result != NULL)
  465.     result->PrintAsActionResult(&ss);
  466.   ss << "\n" << why.str();
  467.  
  468.   if (!found) {
  469.     // No expectation matches this call - reports a failure.
  470.     Expect(false, NULL, -1, ss.str());
  471.   } else if (is_excessive) {
  472.     // We had an upper-bound violation and the failure message is in ss.
  473.     Expect(false, untyped_expectation->file(),
  474.            untyped_expectation->line(), ss.str());
  475.   } else {
  476.     // We had an expected call and the matching expectation is
  477.     // described in ss.
  478.     Log(kInfo, loc.str() + ss.str(), 2);
  479.   }
  480.  
  481.   return result;
  482. }
  483.  
  484. // Returns an Expectation object that references and co-owns exp,
  485. // which must be an expectation on this mock function.
  486. Expectation UntypedFunctionMockerBase::GetHandleOf(ExpectationBase* exp) {
  487.   // See the definition of untyped_expectations_ for why access to it
  488.   // is unprotected here.
  489.   for (UntypedExpectations::const_iterator it =
  490.            untyped_expectations_.begin();
  491.        it != untyped_expectations_.end(); ++it) {
  492.     if (it->get() == exp) {
  493.       return Expectation(*it);
  494.     }
  495.   }
  496.  
  497.   Assert(false, __FILE__, __LINE__, "Cannot find expectation.");
  498.   return Expectation();
  499.   // The above statement is just to make the code compile, and will
  500.   // never be executed.
  501. }
  502.  
  503. // Verifies that all expectations on this mock function have been
  504. // satisfied.  Reports one or more Google Test non-fatal failures
  505. // and returns false if not.
  506. bool UntypedFunctionMockerBase::VerifyAndClearExpectationsLocked()
  507.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  508.   g_gmock_mutex.AssertHeld();
  509.   bool expectations_met = true;
  510.   for (UntypedExpectations::const_iterator it =
  511.            untyped_expectations_.begin();
  512.        it != untyped_expectations_.end(); ++it) {
  513.     ExpectationBase* const untyped_expectation = it->get();
  514.     if (untyped_expectation->IsOverSaturated()) {
  515.       // There was an upper-bound violation.  Since the error was
  516.       // already reported when it occurred, there is no need to do
  517.       // anything here.
  518.       expectations_met = false;
  519.     } else if (!untyped_expectation->IsSatisfied()) {
  520.       expectations_met = false;
  521.       ::std::stringstream ss;
  522.       ss  << "Actual function call count doesn't match "
  523.           << untyped_expectation->source_text() << "...\n";
  524.       // No need to show the source file location of the expectation
  525.       // in the description, as the Expect() call that follows already
  526.       // takes care of it.
  527.       untyped_expectation->MaybeDescribeExtraMatcherTo(&ss);
  528.       untyped_expectation->DescribeCallCountTo(&ss);
  529.       Expect(false, untyped_expectation->file(),
  530.              untyped_expectation->line(), ss.str());
  531.     }
  532.   }
  533.  
  534.   // Deleting our expectations may trigger other mock objects to be deleted, for
  535.   // example if an action contains a reference counted smart pointer to that
  536.   // mock object, and that is the last reference. So if we delete our
  537.   // expectations within the context of the global mutex we may deadlock when
  538.   // this method is called again. Instead, make a copy of the set of
  539.   // expectations to delete, clear our set within the mutex, and then clear the
  540.   // copied set outside of it.
  541.   UntypedExpectations expectations_to_delete;
  542.   untyped_expectations_.swap(expectations_to_delete);
  543.  
  544.   g_gmock_mutex.Unlock();
  545.   expectations_to_delete.clear();
  546.   g_gmock_mutex.Lock();
  547.  
  548.   return expectations_met;
  549. }
  550.  
  551. CallReaction intToCallReaction(int mock_behavior) {
  552.   if (mock_behavior >= kAllow && mock_behavior <= kFail) {
  553.     return static_cast<internal::CallReaction>(mock_behavior);
  554.   }
  555.   return kWarn;
  556. }
  557.  
  558. }  // namespace internal
  559.  
  560. // Class Mock.
  561.  
  562. namespace {
  563.  
  564. typedef std::set<internal::UntypedFunctionMockerBase*> FunctionMockers;
  565.  
  566. // The current state of a mock object.  Such information is needed for
  567. // detecting leaked mock objects and explicitly verifying a mock's
  568. // expectations.
  569. struct MockObjectState {
  570.   MockObjectState()
  571.       : first_used_file(NULL), first_used_line(-1), leakable(false) {}
  572.  
  573.   // Where in the source file an ON_CALL or EXPECT_CALL is first
  574.   // invoked on this mock object.
  575.   const char* first_used_file;
  576.   int first_used_line;
  577.   ::std::string first_used_test_case;
  578.   ::std::string first_used_test;
  579.   bool leakable;  // true iff it's OK to leak the object.
  580.   FunctionMockers function_mockers;  // All registered methods of the object.
  581. };
  582.  
  583. // A global registry holding the state of all mock objects that are
  584. // alive.  A mock object is added to this registry the first time
  585. // Mock::AllowLeak(), ON_CALL(), or EXPECT_CALL() is called on it.  It
  586. // is removed from the registry in the mock object's destructor.
  587. class MockObjectRegistry {
  588.  public:
  589.   // Maps a mock object (identified by its address) to its state.
  590.   typedef std::map<const void*, MockObjectState> StateMap;
  591.  
  592.   // This destructor will be called when a program exits, after all
  593.   // tests in it have been run.  By then, there should be no mock
  594.   // object alive.  Therefore we report any living object as test
  595.   // failure, unless the user explicitly asked us to ignore it.
  596.   ~MockObjectRegistry() {
  597.     // "using ::std::cout;" doesn't work with Symbian's STLport, where cout is
  598.     // a macro.
  599.  
  600.     if (!GMOCK_FLAG(catch_leaked_mocks))
  601.       return;
  602.  
  603.     int leaked_count = 0;
  604.     for (StateMap::const_iterator it = states_.begin(); it != states_.end();
  605.          ++it) {
  606.       if (it->second.leakable)  // The user said it's fine to leak this object.
  607.         continue;
  608.  
  609.       // FIXME: Print the type of the leaked object.
  610.       // This can help the user identify the leaked object.
  611.       std::cout << "\n";
  612.       const MockObjectState& state = it->second;
  613.       std::cout << internal::FormatFileLocation(state.first_used_file,
  614.                                                 state.first_used_line);
  615.       std::cout << " ERROR: this mock object";
  616.       if (state.first_used_test != "") {
  617.         std::cout << " (used in test " << state.first_used_test_case << "."
  618.              << state.first_used_test << ")";
  619.       }
  620.       std::cout << " should be deleted but never is. Its address is @"
  621.            << it->first << ".";
  622.       leaked_count++;
  623.     }
  624.     if (leaked_count > 0) {
  625.       std::cout << "\nERROR: " << leaked_count << " leaked mock "
  626.                 << (leaked_count == 1 ? "object" : "objects")
  627.                 << " found at program exit. Expectations on a mock object is "
  628.                    "verified when the object is destructed. Leaking a mock "
  629.                    "means that its expectations aren't verified, which is "
  630.                    "usually a test bug. If you really intend to leak a mock, "
  631.                    "you can suppress this error using "
  632.                    "testing::Mock::AllowLeak(mock_object), or you may use a "
  633.                    "fake or stub instead of a mock.\n";
  634.       std::cout.flush();
  635.       ::std::cerr.flush();
  636.       // RUN_ALL_TESTS() has already returned when this destructor is
  637.       // called.  Therefore we cannot use the normal Google Test
  638.       // failure reporting mechanism.
  639.       _exit(1);  // We cannot call exit() as it is not reentrant and
  640.                  // may already have been called.
  641.     }
  642.   }
  643.  
  644.   StateMap& states() { return states_; }
  645.  
  646.  private:
  647.   StateMap states_;
  648. };
  649.  
  650. // Protected by g_gmock_mutex.
  651. MockObjectRegistry g_mock_object_registry;
  652.  
  653. // Maps a mock object to the reaction Google Mock should have when an
  654. // uninteresting method is called.  Protected by g_gmock_mutex.
  655. std::map<const void*, internal::CallReaction> g_uninteresting_call_reaction;
  656.  
  657. // Sets the reaction Google Mock should have when an uninteresting
  658. // method of the given mock object is called.
  659. void SetReactionOnUninterestingCalls(const void* mock_obj,
  660.                                      internal::CallReaction reaction)
  661.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  662.   internal::MutexLock l(&internal::g_gmock_mutex);
  663.   g_uninteresting_call_reaction[mock_obj] = reaction;
  664. }
  665.  
  666. }  // namespace
  667.  
  668. // Tells Google Mock to allow uninteresting calls on the given mock
  669. // object.
  670. void Mock::AllowUninterestingCalls(const void* mock_obj)
  671.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  672.   SetReactionOnUninterestingCalls(mock_obj, internal::kAllow);
  673. }
  674.  
  675. // Tells Google Mock to warn the user about uninteresting calls on the
  676. // given mock object.
  677. void Mock::WarnUninterestingCalls(const void* mock_obj)
  678.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  679.   SetReactionOnUninterestingCalls(mock_obj, internal::kWarn);
  680. }
  681.  
  682. // Tells Google Mock to fail uninteresting calls on the given mock
  683. // object.
  684. void Mock::FailUninterestingCalls(const void* mock_obj)
  685.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  686.   SetReactionOnUninterestingCalls(mock_obj, internal::kFail);
  687. }
  688.  
  689. // Tells Google Mock the given mock object is being destroyed and its
  690. // entry in the call-reaction table should be removed.
  691. void Mock::UnregisterCallReaction(const void* mock_obj)
  692.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  693.   internal::MutexLock l(&internal::g_gmock_mutex);
  694.   g_uninteresting_call_reaction.erase(mock_obj);
  695. }
  696.  
  697. // Returns the reaction Google Mock will have on uninteresting calls
  698. // made on the given mock object.
  699. internal::CallReaction Mock::GetReactionOnUninterestingCalls(
  700.     const void* mock_obj)
  701.         GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  702.   internal::MutexLock l(&internal::g_gmock_mutex);
  703.   return (g_uninteresting_call_reaction.count(mock_obj) == 0) ?
  704.       internal::intToCallReaction(GMOCK_FLAG(default_mock_behavior)) :
  705.       g_uninteresting_call_reaction[mock_obj];
  706. }
  707.  
  708. // Tells Google Mock to ignore mock_obj when checking for leaked mock
  709. // objects.
  710. void Mock::AllowLeak(const void* mock_obj)
  711.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  712.   internal::MutexLock l(&internal::g_gmock_mutex);
  713.   g_mock_object_registry.states()[mock_obj].leakable = true;
  714. }
  715.  
  716. // Verifies and clears all expectations on the given mock object.  If
  717. // the expectations aren't satisfied, generates one or more Google
  718. // Test non-fatal failures and returns false.
  719. bool Mock::VerifyAndClearExpectations(void* mock_obj)
  720.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  721.   internal::MutexLock l(&internal::g_gmock_mutex);
  722.   return VerifyAndClearExpectationsLocked(mock_obj);
  723. }
  724.  
  725. // Verifies all expectations on the given mock object and clears its
  726. // default actions and expectations.  Returns true iff the
  727. // verification was successful.
  728. bool Mock::VerifyAndClear(void* mock_obj)
  729.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  730.   internal::MutexLock l(&internal::g_gmock_mutex);
  731.   ClearDefaultActionsLocked(mock_obj);
  732.   return VerifyAndClearExpectationsLocked(mock_obj);
  733. }
  734.  
  735. // Verifies and clears all expectations on the given mock object.  If
  736. // the expectations aren't satisfied, generates one or more Google
  737. // Test non-fatal failures and returns false.
  738. bool Mock::VerifyAndClearExpectationsLocked(void* mock_obj)
  739.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
  740.   internal::g_gmock_mutex.AssertHeld();
  741.   if (g_mock_object_registry.states().count(mock_obj) == 0) {
  742.     // No EXPECT_CALL() was set on the given mock object.
  743.     return true;
  744.   }
  745.  
  746.   // Verifies and clears the expectations on each mock method in the
  747.   // given mock object.
  748.   bool expectations_met = true;
  749.   FunctionMockers& mockers =
  750.       g_mock_object_registry.states()[mock_obj].function_mockers;
  751.   for (FunctionMockers::const_iterator it = mockers.begin();
  752.        it != mockers.end(); ++it) {
  753.     if (!(*it)->VerifyAndClearExpectationsLocked()) {
  754.       expectations_met = false;
  755.     }
  756.   }
  757.  
  758.   // We don't clear the content of mockers, as they may still be
  759.   // needed by ClearDefaultActionsLocked().
  760.   return expectations_met;
  761. }
  762.  
  763. // Registers a mock object and a mock method it owns.
  764. void Mock::Register(const void* mock_obj,
  765.                     internal::UntypedFunctionMockerBase* mocker)
  766.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  767.   internal::MutexLock l(&internal::g_gmock_mutex);
  768.   g_mock_object_registry.states()[mock_obj].function_mockers.insert(mocker);
  769. }
  770.  
  771. // Tells Google Mock where in the source code mock_obj is used in an
  772. // ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
  773. // information helps the user identify which object it is.
  774. void Mock::RegisterUseByOnCallOrExpectCall(const void* mock_obj,
  775.                                            const char* file, int line)
  776.     GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  777.   internal::MutexLock l(&internal::g_gmock_mutex);
  778.   MockObjectState& state = g_mock_object_registry.states()[mock_obj];
  779.   if (state.first_used_file == NULL) {
  780.     state.first_used_file = file;
  781.     state.first_used_line = line;
  782.     const TestInfo* const test_info =
  783.         UnitTest::GetInstance()->current_test_info();
  784.     if (test_info != NULL) {
  785.       // FIXME: record the test case name when the
  786.       // ON_CALL or EXPECT_CALL is invoked from SetUpTestCase() or
  787.       // TearDownTestCase().
  788.       state.first_used_test_case = test_info->test_case_name();
  789.       state.first_used_test = test_info->name();
  790.     }
  791.   }
  792. }
  793.  
  794. // Unregisters a mock method; removes the owning mock object from the
  795. // registry when the last mock method associated with it has been
  796. // unregistered.  This is called only in the destructor of
  797. // FunctionMockerBase.
  798. void Mock::UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
  799.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
  800.   internal::g_gmock_mutex.AssertHeld();
  801.   for (MockObjectRegistry::StateMap::iterator it =
  802.            g_mock_object_registry.states().begin();
  803.        it != g_mock_object_registry.states().end(); ++it) {
  804.     FunctionMockers& mockers = it->second.function_mockers;
  805.     if (mockers.erase(mocker) > 0) {
  806.       // mocker was in mockers and has been just removed.
  807.       if (mockers.empty()) {
  808.         g_mock_object_registry.states().erase(it);
  809.       }
  810.       return;
  811.     }
  812.   }
  813. }
  814.  
  815. // Clears all ON_CALL()s set on the given mock object.
  816. void Mock::ClearDefaultActionsLocked(void* mock_obj)
  817.     GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
  818.   internal::g_gmock_mutex.AssertHeld();
  819.  
  820.   if (g_mock_object_registry.states().count(mock_obj) == 0) {
  821.     // No ON_CALL() was set on the given mock object.
  822.     return;
  823.   }
  824.  
  825.   // Clears the default actions for each mock method in the given mock
  826.   // object.
  827.   FunctionMockers& mockers =
  828.       g_mock_object_registry.states()[mock_obj].function_mockers;
  829.   for (FunctionMockers::const_iterator it = mockers.begin();
  830.        it != mockers.end(); ++it) {
  831.     (*it)->ClearDefaultActionsLocked();
  832.   }
  833.  
  834.   // We don't clear the content of mockers, as they may still be
  835.   // needed by VerifyAndClearExpectationsLocked().
  836. }
  837.  
  838. Expectation::Expectation() {}
  839.  
  840. Expectation::Expectation(
  841.     const internal::linked_ptr<internal::ExpectationBase>& an_expectation_base)
  842.     : expectation_base_(an_expectation_base) {}
  843.  
  844. Expectation::~Expectation() {}
  845.  
  846. // Adds an expectation to a sequence.
  847. void Sequence::AddExpectation(const Expectation& expectation) const {
  848.   if (*last_expectation_ != expectation) {
  849.     if (last_expectation_->expectation_base() != NULL) {
  850.       expectation.expectation_base()->immediate_prerequisites_
  851.           += *last_expectation_;
  852.     }
  853.     *last_expectation_ = expectation;
  854.   }
  855. }
  856.  
  857. // Creates the implicit sequence if there isn't one.
  858. InSequence::InSequence() {
  859.   if (internal::g_gmock_implicit_sequence.get() == NULL) {
  860.     internal::g_gmock_implicit_sequence.set(new Sequence);
  861.     sequence_created_ = true;
  862.   } else {
  863.     sequence_created_ = false;
  864.   }
  865. }
  866.  
  867. // Deletes the implicit sequence if it was created by the constructor
  868. // of this object.
  869. InSequence::~InSequence() {
  870.   if (sequence_created_) {
  871.     delete internal::g_gmock_implicit_sequence.get();
  872.     internal::g_gmock_implicit_sequence.set(NULL);
  873.   }
  874. }
  875.  
  876. }  // namespace testing
  877.  
  878. #ifdef _MSC_VER
  879. #if _MSC_VER <= 1900
  880. #  pragma warning(pop)
  881. #endif
  882. #endif
  883.