summaryrefslogtreecommitdiffstats
path: root/src/gmock-spec-builders.cc
blob: 2b48af13734784623f7ad76298f3bf2f99063773 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
// 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.
//
// Author: wan@google.com (Zhanyong Wan)

// Google Mock - a framework for writing C++ mock classes.
//
// This file implements the spec builder syntax (ON_CALL and
// EXPECT_CALL).

#include "gmock/gmock-spec-builders.h"

#include <stdlib.h>
#include <iostream>  // NOLINT
#include <map>
#include <set>
#include <string>
#include "gmock/gmock.h"
#include "gtest/gtest.h"

#if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
# include <unistd.h>  // NOLINT
#endif

namespace testing {
namespace internal {

// Protects the mock object registry (in class Mock), all function
// mockers, and all expectations.
GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_gmock_mutex);

// Logs a message including file and line number information.
GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
                                const char* file, int line,
                                const string& message) {
  ::std::ostringstream s;
  s << file << ":" << line << ": " << message << ::std::endl;
  Log(severity, s.str(), 0);
}

// Constructs an ExpectationBase object.
ExpectationBase::ExpectationBase(const char* a_file,
                                 int a_line,
                                 const string& a_source_text)
    : file_(a_file),
      line_(a_line),
      source_text_(a_source_text),
      cardinality_specified_(false),
      cardinality_(Exactly(1)),
      call_count_(0),
      retired_(false),
      extra_matcher_specified_(false),
      repeated_action_specified_(false),
      retires_on_saturation_(false),
      last_clause_(kNone),
      action_count_checked_(false) {}

// Destructs an ExpectationBase object.
ExpectationBase::~ExpectationBase() {}

// Explicitly specifies the cardinality of this expectation.  Used by
// the subclasses to implement the .Times() clause.
void ExpectationBase::SpecifyCardinality(const Cardinality& a_cardinality) {
  cardinality_specified_ = true;
  cardinality_ = a_cardinality;
}

// Retires all pre-requisites of this expectation.
void ExpectationBase::RetireAllPreRequisites()
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  if (is_retired()) {
    // We can take this short-cut as we never retire an expectation
    // until we have retired all its pre-requisites.
    return;
  }

  for (ExpectationSet::const_iterator it = immediate_prerequisites_.begin();
       it != immediate_prerequisites_.end(); ++it) {
    ExpectationBase* const prerequisite = it->expectation_base().get();
    if (!prerequisite->is_retired()) {
      prerequisite->RetireAllPreRequisites();
      prerequisite->Retire();
    }
  }
}

// Returns true iff all pre-requisites of this expectation have been
// satisfied.
bool ExpectationBase::AllPrerequisitesAreSatisfied() const
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  g_gmock_mutex.AssertHeld();
  for (ExpectationSet::const_iterator it = immediate_prerequisites_.begin();
       it != immediate_prerequisites_.end(); ++it) {
    if (!(it->expectation_base()->IsSatisfied()) ||
        !(it->expectation_base()->AllPrerequisitesAreSatisfied()))
      return false;
  }
  return true;
}

// Adds unsatisfied pre-requisites of this expectation to 'result'.
void ExpectationBase::FindUnsatisfiedPrerequisites(ExpectationSet* result) const
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  g_gmock_mutex.AssertHeld();
  for (ExpectationSet::const_iterator it = immediate_prerequisites_.begin();
       it != immediate_prerequisites_.end(); ++it) {
    if (it->expectation_base()->IsSatisfied()) {
      // If *it is satisfied and has a call count of 0, some of its
      // pre-requisites may not be satisfied yet.
      if (it->expectation_base()->call_count_ == 0) {
        it->expectation_base()->FindUnsatisfiedPrerequisites(result);
      }
    } else {
      // Now that we know *it is unsatisfied, we are not so interested
      // in whether its pre-requisites are satisfied.  Therefore we
      // don't recursively call FindUnsatisfiedPrerequisites() here.
      *result += *it;
    }
  }
}

// Describes how many times a function call matching this
// expectation has occurred.
void ExpectationBase::DescribeCallCountTo(::std::ostream* os) const
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  g_gmock_mutex.AssertHeld();

  // Describes how many times the function is expected to be called.
  *os << "         Expected: to be ";
  cardinality().DescribeTo(os);
  *os << "\n           Actual: ";
  Cardinality::DescribeActualCallCountTo(call_count(), os);

  // Describes the state of the expectation (e.g. is it satisfied?
  // is it active?).
  *os << " - " << (IsOverSaturated() ? "over-saturated" :
                   IsSaturated() ? "saturated" :
                   IsSatisfied() ? "satisfied" : "unsatisfied")
      << " and "
      << (is_retired() ? "retired" : "active");
}

// 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 ExpectationBase::CheckActionCountIfNotDone() const
    GTEST_LOCK_EXCLUDED_(mutex_) {
  bool should_check = false;
  {
    MutexLock l(&mutex_);
    if (!action_count_checked_) {
      action_count_checked_ = true;
      should_check = true;
    }
  }

  if (should_check) {
    if (!cardinality_specified_) {
      // The cardinality was inferred - no need to check the action
      // count against it.
      return;
    }

    // The cardinality was explicitly specified.
    const int action_count = static_cast<int>(untyped_actions_.size());
    const int upper_bound = cardinality().ConservativeUpperBound();
    const int lower_bound = cardinality().ConservativeLowerBound();
    bool too_many;  // True if there are too many actions, or false
    // if there are too few.
    if (action_count > upper_bound ||
        (action_count == upper_bound && repeated_action_specified_)) {
      too_many = true;
    } else if (0 < action_count && action_count < lower_bound &&
               !repeated_action_specified_) {
      too_many = false;
    } else {
      return;
    }

    ::std::stringstream ss;
    DescribeLocationTo(&ss);
    ss << "Too " << (too_many ? "many" : "few")
       << " actions specified in " << source_text() << "...\n"
       << "Expected to be ";
    cardinality().DescribeTo(&ss);
    ss << ", but has " << (too_many ? "" : "only ")
       << action_count << " WillOnce()"
       << (action_count == 1 ? "" : "s");
    if (repeated_action_specified_) {
      ss << " and a WillRepeatedly()";
    }
    ss << ".";
    Log(kWarning, ss.str(), -1);  // -1 means "don't print stack trace".
  }
}

// Implements the .Times() clause.
void ExpectationBase::UntypedTimes(const Cardinality& a_cardinality) {
  if (last_clause_ == kTimes) {
    ExpectSpecProperty(false,
                       ".Times() cannot appear "
                       "more than once in an EXPECT_CALL().");
  } else {
    ExpectSpecProperty(last_clause_ < kTimes,
                       ".Times() cannot appear after "
                       ".InSequence(), .WillOnce(), .WillRepeatedly(), "
                       "or .RetiresOnSaturation().");
  }
  last_clause_ = kTimes;

  SpecifyCardinality(a_cardinality);
}

// Points to the implicit sequence introduced by a living InSequence
// object (if any) in the current thread or NULL.
GTEST_API_ ThreadLocal<Sequence*> g_gmock_implicit_sequence;

// Reports an uninteresting call (whose description is in msg) in the
// manner specified by 'reaction'.
void ReportUninterestingCall(CallReaction reaction, const string& msg) {
  // Include a stack trace only if --gmock_verbose=info is specified.
  const int stack_frames_to_skip =
      GMOCK_FLAG(verbose) == kInfoVerbosity ? 3 : -1;
  switch (reaction) {
    case kAllow:
      Log(kInfo, msg, stack_frames_to_skip);
      break;
    case kWarn:
      Log(kWarning,
          msg +
          "\nNOTE: You can safely ignore the above warning unless this "
          "call should not happen.  Do not suppress it by blindly adding "
          "an EXPECT_CALL() if you don't mean to enforce the call.  "
          "See http://code.google.com/p/googlemock/wiki/CookBook#"
          "Knowing_When_to_Expect for details.\n",
          stack_frames_to_skip);
      break;
    default:  // FAIL
      Expect(false, NULL, -1, msg);
  }
}

UntypedFunctionMockerBase::UntypedFunctionMockerBase()
    : mock_obj_(NULL), name_("") {}

UntypedFunctionMockerBase::~UntypedFunctionMockerBase() {}

// 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.
void UntypedFunctionMockerBase::RegisterOwner(const void* mock_obj)
    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  {
    MutexLock l(&g_gmock_mutex);
    mock_obj_ = mock_obj;
  }
  Mock::Register(mock_obj, this);
}

// 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 UntypedFunctionMockerBase::SetOwnerAndName(const void* mock_obj,
                                                const char* name)
    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  // We protect name_ under g_gmock_mutex in case this mock function
  // is called from two threads concurrently.
  MutexLock l(&g_gmock_mutex);
  mock_obj_ = mock_obj;
  name_ = name;
}

// Returns the name of the function being mocked.  Must be called
// after RegisterOwner() or SetOwnerAndName() has been called.
const void* UntypedFunctionMockerBase::MockObject() const
    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  const void* mock_obj;
  {
    // We protect mock_obj_ under g_gmock_mutex in case this mock
    // function is called from two threads concurrently.
    MutexLock l(&g_gmock_mutex);
    Assert(mock_obj_ != NULL, __FILE__, __LINE__,
           "MockObject() must not be called before RegisterOwner() or "
           "SetOwnerAndName() has been called.");
    mock_obj = mock_obj_;
  }
  return mock_obj;
}

// Returns the name of this mock method.  Must be called after
// SetOwnerAndName() has been called.
const char* UntypedFunctionMockerBase::Name() const
    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  const char* name;
  {
    // We protect name_ under g_gmock_mutex in case this mock
    // function is called from two threads concurrently.
    MutexLock l(&g_gmock_mutex);
    Assert(name_ != NULL, __FILE__, __LINE__,
           "Name() must not be called before SetOwnerAndName() has "
           "been called.");
    name = name_;
  }
  return name;
}

// Calculates the result of invoking this mock function with the given
// arguments, prints it, and returns it.  The caller is responsible
// for deleting the result.
UntypedActionResultHolderBase*
UntypedFunctionMockerBase::UntypedInvokeWith(const void* const untyped_args)
    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
  if (untyped_expectations_.size() == 0) {
    // No expectation is set on this mock method - we have an
    // uninteresting call.

    // We must get Google Mock's reaction on uninteresting calls
    // made on this mock object BEFORE performing the action,
    // because the action may DELETE the mock object and make the
    // following expression meaningless.
    const CallReaction reaction =
        Mock::GetReactionOnUninterestingCalls(MockObject());

    // True iff we need to print this call's arguments and return
    // value.  This definition must be kept in sync with
    // the behavior of ReportUninterestingCall().
    const bool need_to_report_uninteresting_call =
        // If the user allows this uninteresting call, we print it
        // only when he wants informational messages.
        reaction == kAllow ? LogIsVisible(kInfo) :
        // If the user wants this to be a warning, we print it only
        // when he wants to see warnings.
        reaction == kWarn ? LogIsVisible(kWarning) :
        // Otherwise, the user wants this to be an error, and we
        // should always print detailed information in the error.
        true;

    if (!need_to_report_uninteresting_call) {
      // Perform the action without printing the call information.
      return this->UntypedPerformDefaultAction(untyped_args, "");
    }

    // Warns about the uninteresting call.
    ::std::stringstream ss;
    this->UntypedDescribeUninterestingCall(untyped_args, &ss);

    // Calculates the function result.
    UntypedActionResultHolderBase* const result =
        this->UntypedPerformDefaultAction(untyped_args, ss.str());

    // Prints the function result.
    if (result != NULL)
      result->PrintAsActionResult(&ss);

    ReportUninterestingCall(reaction, ss.str());
    return result;
  }

  bool is_excessive = false;
  ::std::stringstream ss;
  ::std::stringstream why;
  ::std::stringstream loc;
  const void* untyped_action = NULL;

  // The UntypedFindMatchingExpectation() function acquires and
  // releases g_gmock_mutex.
  const ExpectationBase* const untyped_expectation =
      this->UntypedFindMatchingExpectation(
          untyped_args, &untyped_action, &is_excessive,
          &ss, &why);
  const bool found = untyped_expectation != NULL;

  // True iff we need to print the call's arguments and return value.
  // This definition must be kept in sync with the uses of Expect()
  // and Log() in this function.
  const bool need_to_report_call =
      !found || is_excessive || LogIsVisible(kInfo);
  if (!need_to_report_call) {
    // Perform the action without printing the call information.
    return
        untyped_action == NULL ?
        this->UntypedPerformDefaultAction(untyped_args, "") :
        this->UntypedPerformAction(untyped_action, untyped_args);
  }

  ss << "    Function call: " << Name();
  this->UntypedPrintArgs(untyped_args, &ss);

  // In case the action deletes a piece of the expectation, we
  // generate the message beforehand.
  if (found && !is_excessive) {
    untyped_expectation->DescribeLocationTo(&loc);
  }

  UntypedActionResultHolderBase* const result =
      untyped_action == NULL ?
      this->UntypedPerformDefaultAction(untyped_args, ss.str()) :
      this->UntypedPerformAction(untyped_action, untyped_args);
  if (result != NULL)
    result->PrintAsActionResult(&ss);
  ss << "\n" << why.str();

  if (!found) {
    // No expectation matches this call - reports a failure.
    Expect(false, NULL, -1, ss.str());
  } else if (is_excessive) {
    // We had an upper-bound violation and the failure message is in ss.
    Expect(false, untyped_expectation->file(),
           untyped_expectation->line(), ss.str());
  } else {
    // We had an expected call and the matching expectation is
    // described in ss.
    Log(kInfo, loc.str() + ss.str(), 2);
  }

  return result;
}

// Returns an Expectation object that references and co-owns exp,
// which must be an expectation on this mock function.
Expectation UntypedFunctionMockerBase::GetHandleOf(ExpectationBase* exp) {
  for (UntypedExpectations::const_iterator it =
           untyped_expectations_.begin();
       it != untyped_expectations_.end(); ++it) {
    if (it->get() == exp) {
      return Expectation(*it);
    }
  }

  Assert(false, __FILE__, __LINE__, "Cannot find expectation.");
  return Expectation();
  // The above statement is just to make the code compile, and will
  // never be executed.
}

// 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 UntypedFunctionMockerBase::VerifyAndClearExpectationsLocked()
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
  g_gmock_mutex.AssertHeld();
  bool expectations_met = true;
  for (UntypedExpectations::const_iterator it =
           untyped_expectations_.begin();
       it != untyped_expectations_.end(); ++it) {
    ExpectationBase* const untyped_expectation = it->get();
    if (untyped_expectation->IsOverSaturated()) {
      // There was an upper-bound violation.  Since the error was
      // already reported when it occurred, there is no need to do
      // anything here.
      expectations_met = false;
    } else if (!untyped_expectation->IsSatisfied()) {
      expectations_met = false;
      ::std::stringstream ss;
      ss  << "Actual function call count doesn't match "
          << untyped_expectation->source_text() << "...\n";
      // No need to show the source file location of the expectation
      // in the description, as the Expect() call that follows already
      // takes care of it.
      untyped_expectation->MaybeDescribeExtraMatcherTo(&ss);
      untyped_expectation->DescribeCallCountTo(&ss);
      Expect(false, untyped_expectation->file(),
             untyped_expectation->line(), ss.str());
    }
  }

  // Deleting our expectations 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
  // expectations within the context of the global mutex we may deadlock when
  // this method is called again. Instead, make a copy of the set of
  // expectations to delete, clear our set within the mutex, and then clear the
  // copied set outside of it.
  UntypedExpectations expectations_to_delete;
  untyped_expectations_.swap(expectations_to_delete);

  g_gmock_mutex.Unlock();
  expectations_to_delete.clear();
  g_gmock_mutex.Lock();

  return expectations_met;
}

}  // namespace internal

// Class Mock.

namespace {

typedef std::set<internal::UntypedFunctionMockerBase*> FunctionMockers;

// The current state of a mock object.  Such information is needed for
// detecting leaked mock objects and explicitly verifying a mock's
// expectations.
struct MockObjectState {
  MockObjectState()
      : first_used_file(NULL), first_used_line(-1), leakable(false) {}

  // Where in the source file an ON_CALL or EXPECT_CALL is first
  // invoked on this mock object.
  const char* first_used_file;
  int first_used_line;
  ::std::string first_used_test_case;
  ::std::string first_used_test;
  bool leakable;  // true iff it's OK to leak the object.
  FunctionMockers function_mockers;  // All registered methods of the object.
};

// A global registry holding the state of all mock objects that are
// alive.  A mock object is added to this registry the first time
// Mock::AllowLeak(), ON_CALL(), or EXPECT_CALL() is called on it.  It
// is removed from the registry in the mock object's destructor.
class MockObjectRegistry {
 public:
  // Maps a mock object (identified by its address) to its state.
  typedef std::map<const void*, MockObjectState> StateMap;

  // This destructor will be called when a program exits, after all
  // tests in it have been run.  By then, there should be no mock
  // object alive.  Therefore we report any living object as test
  // failure, unless the user explicitly asked us to ignore it.
  ~MockObjectRegistry() {
    // "using ::std::cout;" doesn't work with Symbian's STLport, where cout is
    // a macro.

    if (!GMOCK_FLAG(catch_leaked_mocks))
      return;

    int leaked_count = 0;
    for (StateMap::const_iterator it = states_.begin(); it != states_.end();
         ++it) {
      if (it->second.leakable)  // The user said it's fine to leak this object.
        continue;

      // TODO(wan@google.com): Print the type of the leaked object.
      // This can help the user identify the leaked object.
      std::cout << "\n";
      const MockObjectState& state = it->second;
      std::cout << internal::FormatFileLocation(state.first_used_file,
                                                state.first_used_line);
      std::cout << " ERROR: this mock object";
      if (state.first_used_test != "") {
        std::cout << " (used in test " << state.first_used_test_case << "."
             << state.first_used_test << ")";
      }
      std::cout << " should be deleted but never is. Its address is @"
           << it->first << ".";
      leaked_count++;
    }
    if (leaked_count > 0) {
      std::cout << "\nERROR: " << leaked_count
           << " leaked mock " << (leaked_count == 1 ? "object" : "objects")
           << " found at program exit.\n";
      std::cout.flush();
      ::std::cerr.flush();
      // RUN_ALL_TESTS() has already returned when this destructor is
      // called.  Therefore we cannot use the normal Google Test
      // failure reporting mechanism.
      _exit(1);  // We cannot call exit() as it is not reentrant and
                 // may already have been called.
    }
  }

  StateMap& states() { return states_; }

 private:
  StateMap states_;
};

// Protected by g_gmock_mutex.
MockObjectRegistry g_mock_object_registry;

// Maps a mock object to the reaction Google Mock should have when an
// uninteresting method is called.  Protected by g_gmock_mutex.
std::map<const void*, internal::CallReaction> g_uninteresting_call_reaction;

// Sets the reaction Google Mock should have when an uninteresting
// method of the given mock object is called.
void SetReactionOnUninterestingCalls(const void* mock_obj,
                                     internal::CallReaction reaction)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  g_uninteresting_call_reaction[mock_obj] = reaction;
}

}  // namespace

// Tells Google Mock to allow uninteresting calls on the given mock
// object.
void Mock::AllowUninterestingCalls(const void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  SetReactionOnUninterestingCalls(mock_obj, internal::kAllow);
}

// Tells Google Mock to warn the user about uninteresting calls on the
// given mock object.
void Mock::WarnUninterestingCalls(const void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  SetReactionOnUninterestingCalls(mock_obj, internal::kWarn);
}

// Tells Google Mock to fail uninteresting calls on the given mock
// object.
void Mock::FailUninterestingCalls(const void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  SetReactionOnUninterestingCalls(mock_obj, internal::kFail);
}

// Tells Google Mock the given mock object is being destroyed and its
// entry in the call-reaction table should be removed.
void Mock::UnregisterCallReaction(const void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  g_uninteresting_call_reaction.erase(mock_obj);
}

// Returns the reaction Google Mock will have on uninteresting calls
// made on the given mock object.
internal::CallReaction Mock::GetReactionOnUninterestingCalls(
    const void* mock_obj)
        GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  return (g_uninteresting_call_reaction.count(mock_obj) == 0) ?
      internal::kDefault : g_uninteresting_call_reaction[mock_obj];
}

// Tells Google Mock to ignore mock_obj when checking for leaked mock
// objects.
void Mock::AllowLeak(const void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  g_mock_object_registry.states()[mock_obj].leakable = true;
}

// 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.
bool Mock::VerifyAndClearExpectations(void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  return VerifyAndClearExpectationsLocked(mock_obj);
}

// Verifies all expectations on the given mock object and clears its
// default actions and expectations.  Returns true iff the
// verification was successful.
bool Mock::VerifyAndClear(void* mock_obj)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  ClearDefaultActionsLocked(mock_obj);
  return VerifyAndClearExpectationsLocked(mock_obj);
}

// 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.
bool Mock::VerifyAndClearExpectationsLocked(void* mock_obj)
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
  internal::g_gmock_mutex.AssertHeld();
  if (g_mock_object_registry.states().count(mock_obj) == 0) {
    // No EXPECT_CALL() was set on the given mock object.
    return true;
  }

  // Verifies and clears the expectations on each mock method in the
  // given mock object.
  bool expectations_met = true;
  FunctionMockers& mockers =
      g_mock_object_registry.states()[mock_obj].function_mockers;
  for (FunctionMockers::const_iterator it = mockers.begin();
       it != mockers.end(); ++it) {
    if (!(*it)->VerifyAndClearExpectationsLocked()) {
      expectations_met = false;
    }
  }

  // We don't clear the content of mockers, as they may still be
  // needed by ClearDefaultActionsLocked().
  return expectations_met;
}

// Registers a mock object and a mock method it owns.
void Mock::Register(const void* mock_obj,
                    internal::UntypedFunctionMockerBase* mocker)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  g_mock_object_registry.states()[mock_obj].function_mockers.insert(mocker);
}

// 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.
void Mock::RegisterUseByOnCallOrExpectCall(const void* mock_obj,
                                           const char* file, int line)
    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
  internal::MutexLock l(&internal::g_gmock_mutex);
  MockObjectState& state = g_mock_object_registry.states()[mock_obj];
  if (state.first_used_file == NULL) {
    state.first_used_file = file;
    state.first_used_line = line;
    const TestInfo* const test_info =
        UnitTest::GetInstance()->current_test_info();
    if (test_info != NULL) {
      // TODO(wan@google.com): record the test case name when the
      // ON_CALL or EXPECT_CALL is invoked from SetUpTestCase() or
      // TearDownTestCase().
      state.first_used_test_case = test_info->test_case_name();
      state.first_used_test = test_info->name();
    }
  }
}

// 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.
void Mock::UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
  internal::g_gmock_mutex.AssertHeld();
  for (MockObjectRegistry::StateMap::iterator it =
           g_mock_object_registry.states().begin();
       it != g_mock_object_registry.states().end(); ++it) {
    FunctionMockers& mockers = it->second.function_mockers;
    if (mockers.erase(mocker) > 0) {
      // mocker was in mockers and has been just removed.
      if (mockers.empty()) {
        g_mock_object_registry.states().erase(it);
      }
      return;
    }
  }
}

// Clears all ON_CALL()s set on the given mock object.
void Mock::ClearDefaultActionsLocked(void* mock_obj)
    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
  internal::g_gmock_mutex.AssertHeld();

  if (g_mock_object_registry.states().count(mock_obj) == 0) {
    // No ON_CALL() was set on the given mock object.
    return;
  }

  // Clears the default actions for each mock method in the given mock
  // object.
  FunctionMockers& mockers =
      g_mock_object_registry.states()[mock_obj].function_mockers;
  for (FunctionMockers::const_iterator it = mockers.begin();
       it != mockers.end(); ++it) {
    (*it)->ClearDefaultActionsLocked();
  }

  // We don't clear the content of mockers, as they may still be
  // needed by VerifyAndClearExpectationsLocked().
}

Expectation::Expectation() {}

Expectation::Expectation(
    const internal::linked_ptr<internal::ExpectationBase>& an_expectation_base)
    : expectation_base_(an_expectation_base) {}

Expectation::~Expectation() {}

// Adds an expectation to a sequence.
void Sequence::AddExpectation(const Expectation& expectation) const {
  if (*last_expectation_ != expectation) {
    if (last_expectation_->expectation_base() != NULL) {
      expectation.expectation_base()->immediate_prerequisites_
          += *last_expectation_;
    }
    *last_expectation_ = expectation;
  }
}

// Creates the implicit sequence if there isn't one.
InSequence::InSequence() {
  if (internal::g_gmock_implicit_sequence.get() == NULL) {
    internal::g_gmock_implicit_sequence.set(new Sequence);
    sequence_created_ = true;
  } else {
    sequence_created_ = false;
  }
}

// Deletes the implicit sequence if it was created by the constructor
// of this object.
InSequence::~InSequence() {
  if (sequence_created_) {
    delete internal::g_gmock_implicit_sequence.get();
    internal::g_gmock_implicit_sequence.set(NULL);
  }
}

}  // namespace testing