media/audio/audio_manager_factory_unittest.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/scoped_ptr.h"
   6 #include "media/audio/audio_manager.h"
   7 #include "media/audio/audio_manager_factory.h"
   8 #include "media/audio/fake_audio_log_factory.h"
   9 #include "media/audio/fake_audio_manager.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace media {
  13 namespace {
  14
  15 class FakeAudioManagerFactory : public AudioManagerFactory {
  16  public:
  17   FakeAudioManagerFactory() {}
  18   ~FakeAudioManagerFactory() override {}
  19
  20   AudioManager* CreateInstance(AudioLogFactory* audio_log_factory) override {
  21     // |created_instance_| is used for verifying. Ownership is transferred to
  22     // caller.
  23     created_instance_ = new FakeAudioManager(audio_log_factory);
  24     return created_instance_;
  25   }
  26
  27   AudioManager* created_instance() { return created_instance_; }
  28
  29  private:
  30   AudioManager* created_instance_;
  31 };
  32
  33 }  // namespace
  34
  35 // Verifies that SetFactory has the intended effect.
  36 TEST(AudioManagerFactoryTest, CreateInstance) {
  37   // Create an audio manager and verify that it is not null.
  38   scoped_ptr<AudioManager> manager(AudioManager::CreateForTesting());
  39   ASSERT_NE(nullptr, manager.get());
  40   manager.reset();
  41
  42   // Set the factory. Note that ownership of |factory| is transferred to
  43   // AudioManager.
  44   FakeAudioManagerFactory* factory = new FakeAudioManagerFactory();
  45   AudioManager::SetFactory(factory);
  46
  47   // Create the AudioManager instance. Verify that it matches the instance
  48   // provided by the factory.
  49   manager.reset(AudioManager::CreateForTesting());
  50   ASSERT_NE(nullptr, manager.get());
  51   ASSERT_EQ(factory->created_instance(), manager.get());
  52
  53   // Reset AudioManagerFactory to prevent factory from persisting to other
  54   // tests on the same process. |manager| will reset when scope exits.
  55   AudioManager::ResetFactoryForTesting();
  56 }
  57
  58 }  // namespace media