audio_device_listener_win_unittest.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 2012 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 <string>
6
7#include "base/bind.h"
8#include "base/bind_helpers.h"
9#include "base/memory/scoped_ptr.h"
10#include "base/win/scoped_com_initializer.h"
11#include "base/utf_string_conversions.h"
12#include "media/audio/audio_manager.h"
13#include "media/audio/audio_util.h"
14#include "media/audio/win/audio_device_listener_win.h"
15#include "testing/gmock/include/gmock/gmock.h"
16#include "testing/gtest/include/gtest/gtest.h"
17
18using base::win::ScopedCOMInitializer;
19
20namespace media {
21
22static const char* kNoDevice = "";
23static const char* kFirstTestDevice = "test_device_0";
24static const char* kSecondTestDevice = "test_device_1";
25
26class AudioDeviceListenerWinTest : public testing::Test {
27 public:
28  AudioDeviceListenerWinTest()
29      : com_init_(ScopedCOMInitializer::kMTA) {
30  }
31
32  virtual void SetUp() {
33    if (!media::IsWASAPISupported())
34      return;
35
36    output_device_listener_.reset(new AudioDeviceListenerWin(base::Bind(
37        &AudioDeviceListenerWinTest::OnDeviceChange, base::Unretained(this))));
38  }
39
40  // Simulate a device change where no output devices are available.
41  bool SimulateNullDefaultOutputDeviceChange() {
42    return output_device_listener_->OnDefaultDeviceChanged(
43        static_cast<EDataFlow>(eConsole), static_cast<ERole>(eRender),
44        NULL) == S_OK;
45  }
46
47  bool SimulateDefaultOutputDeviceChange(const char* new_device_id) {
48    return output_device_listener_->OnDefaultDeviceChanged(
49        static_cast<EDataFlow>(eConsole), static_cast<ERole>(eRender),
50        ASCIIToWide(new_device_id).c_str()) == S_OK;
51  }
52
53  void SetOutputDeviceId(std::string new_device_id) {
54    output_device_listener_->default_render_device_id_ = new_device_id;
55  }
56
57  MOCK_METHOD0(OnDeviceChange, void());
58
59 private:
60  ScopedCOMInitializer com_init_;
61  scoped_ptr<AudioDeviceListenerWin> output_device_listener_;
62
63  DISALLOW_COPY_AND_ASSIGN(AudioDeviceListenerWinTest);
64};
65
66// Simulate a device change events and ensure we get the right callbacks.
67TEST_F(AudioDeviceListenerWinTest, OutputDeviceChange) {
68  if (!media::IsWASAPISupported())
69    return;
70
71  SetOutputDeviceId(kNoDevice);
72  EXPECT_CALL(*this, OnDeviceChange()).Times(1);
73  ASSERT_TRUE(SimulateDefaultOutputDeviceChange(kFirstTestDevice));
74
75  testing::Mock::VerifyAndClear(this);
76  EXPECT_CALL(*this, OnDeviceChange()).Times(1);
77  ASSERT_TRUE(SimulateDefaultOutputDeviceChange(kSecondTestDevice));
78
79  // The second device event should be ignored since the device id has not
80  // changed.
81  ASSERT_TRUE(SimulateDefaultOutputDeviceChange(kSecondTestDevice));
82}
83
84// Ensure that null output device changes don't crash.  Simulates the situation
85// where we have no output devices.
86TEST_F(AudioDeviceListenerWinTest, NullOutputDeviceChange) {
87  if (!media::IsWASAPISupported())
88    return;
89
90  SetOutputDeviceId(kNoDevice);
91  EXPECT_CALL(*this, OnDeviceChange()).Times(0);
92  ASSERT_TRUE(SimulateNullDefaultOutputDeviceChange());
93
94  testing::Mock::VerifyAndClear(this);
95  EXPECT_CALL(*this, OnDeviceChange()).Times(1);
96  ASSERT_TRUE(SimulateDefaultOutputDeviceChange(kFirstTestDevice));
97
98  testing::Mock::VerifyAndClear(this);
99  EXPECT_CALL(*this, OnDeviceChange()).Times(1);
100  ASSERT_TRUE(SimulateNullDefaultOutputDeviceChange());
101}
102
103}  // namespace media
104