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      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
    150