src/third_party/libjingle/source/talk/base/referencecountedsingletonfactory_unittest.cc

   1 /*
   2  * libjingle
   3  * Copyright 2004--2011, Google Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  *  1. Redistributions of source code must retain the above copyright notice,
   9  *     this list of conditions and the following disclaimer.
  10  *  2. Redistributions in binary form must reproduce the above copyright notice,
  11  *     this list of conditions and the following disclaimer in the documentation
  12  *     and/or other materials provided with the distribution.
  13  *  3. The name of the author may not be used to endorse or promote products
  14  *     derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "talk/base/gunit.h"
  29 #include "talk/base/referencecountedsingletonfactory.h"
  30
  31 namespace talk_base {
  32
  33 class MyExistenceWatcher {
  34  public:
  35   MyExistenceWatcher() { create_called_ = true; }
  36   ~MyExistenceWatcher() { delete_called_ = true; }
  37
  38   static bool create_called_;
  39   static bool delete_called_;
  40 };
  41
  42 bool MyExistenceWatcher::create_called_ = false;
  43 bool MyExistenceWatcher::delete_called_ = false;
  44
  45 class TestReferenceCountedSingletonFactory :
  46     public ReferenceCountedSingletonFactory<MyExistenceWatcher> {
  47  protected:
  48   virtual bool SetupInstance() {
  49     instance_.reset(new MyExistenceWatcher());
  50     return true;
  51   }
  52
  53   virtual void CleanupInstance() {
  54     instance_.reset();
  55   }
  56 };
  57
  58 static void DoCreateAndGoOutOfScope(
  59     ReferenceCountedSingletonFactory<MyExistenceWatcher> *factory) {
  60   rcsf_ptr<MyExistenceWatcher> ptr(factory);
  61   ptr.get();
  62   // and now ptr should go out of scope.
  63 }
  64
  65 TEST(ReferenceCountedSingletonFactory, ZeroReferenceCountCausesDeletion) {
  66   TestReferenceCountedSingletonFactory factory;
  67   MyExistenceWatcher::delete_called_ = false;
  68   DoCreateAndGoOutOfScope(&factory);
  69   EXPECT_TRUE(MyExistenceWatcher::delete_called_);
  70 }
  71
  72 TEST(ReferenceCountedSingletonFactory, NonZeroReferenceCountDoesNotDelete) {
  73   TestReferenceCountedSingletonFactory factory;
  74   rcsf_ptr<MyExistenceWatcher> ptr(&factory);
  75   ptr.get();
  76   MyExistenceWatcher::delete_called_ = false;
  77   DoCreateAndGoOutOfScope(&factory);
  78   EXPECT_FALSE(MyExistenceWatcher::delete_called_);
  79 }
  80
  81 TEST(ReferenceCountedSingletonFactory, ReturnedPointersReferToSameThing) {
  82   TestReferenceCountedSingletonFactory factory;
  83   rcsf_ptr<MyExistenceWatcher> one(&factory), two(&factory);
  84
  85   EXPECT_EQ(one.get(), two.get());
  86 }
  87
  88 TEST(ReferenceCountedSingletonFactory, Release) {
  89   TestReferenceCountedSingletonFactory factory;
  90
  91   rcsf_ptr<MyExistenceWatcher> one(&factory);
  92   one.get();
  93
  94   MyExistenceWatcher::delete_called_ = false;
  95   one.release();
  96   EXPECT_TRUE(MyExistenceWatcher::delete_called_);
  97 }
  98
  99 TEST(ReferenceCountedSingletonFactory, GetWithoutRelease) {
 100   TestReferenceCountedSingletonFactory factory;
 101   rcsf_ptr<MyExistenceWatcher> one(&factory);
 102   one.get();
 103
 104   MyExistenceWatcher::create_called_ = false;
 105   one.get();
 106   EXPECT_FALSE(MyExistenceWatcher::create_called_);
 107 }
 108
 109 TEST(ReferenceCountedSingletonFactory, GetAfterRelease) {
 110   TestReferenceCountedSingletonFactory factory;
 111   rcsf_ptr<MyExistenceWatcher> one(&factory);
 112
 113   MyExistenceWatcher::create_called_ = false;
 114   one.release();
 115   one.get();
 116   EXPECT_TRUE(MyExistenceWatcher::create_called_);
 117 }
 118
 119 TEST(ReferenceCountedSingletonFactory, MultipleReleases) {
 120   TestReferenceCountedSingletonFactory factory;
 121   rcsf_ptr<MyExistenceWatcher> one(&factory), two(&factory);
 122
 123   MyExistenceWatcher::create_called_ = false;
 124   MyExistenceWatcher::delete_called_ = false;
 125   one.release();
 126   EXPECT_FALSE(MyExistenceWatcher::delete_called_);
 127   one.release();
 128   EXPECT_FALSE(MyExistenceWatcher::delete_called_);
 129   one.release();
 130   EXPECT_FALSE(MyExistenceWatcher::delete_called_);
 131   one.get();
 132   EXPECT_TRUE(MyExistenceWatcher::create_called_);
 133 }
 134
 135 TEST(ReferenceCountedSingletonFactory, Existentialism) {
 136   TestReferenceCountedSingletonFactory factory;
 137
 138   rcsf_ptr<MyExistenceWatcher> one(&factory);
 139
 140   MyExistenceWatcher::create_called_ = false;
 141   MyExistenceWatcher::delete_called_ = false;
 142
 143   one.get();
 144   EXPECT_TRUE(MyExistenceWatcher::create_called_);
 145   one.release();
 146   EXPECT_TRUE(MyExistenceWatcher::delete_called_);
 147 }
 148
 149 }  // namespace talk_base