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