Revert 138278 - Fix the volume controlling behaviors.

chrome/browser/ui/views/ash/volume_controller_chromeos_browsertest.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/ui/views/ash/volume_controller_chromeos.h"
-
-#include "chrome/browser/chromeos/audio/audio_handler.h"
-#include "chrome/browser/chromeos/audio/audio_mixer.h"
-#include "chrome/test/base/in_process_browser_test.h"
-#include "chrome/test/base/ui_test_utils.h"
-#include "ui/base/accelerators/accelerator.h"
-
-namespace {
-
-class MockAudioMixer : public chromeos::AudioMixer {
- public:
-  MockAudioMixer()
-      : volume_(0.0),
-        is_muted_(false) {
-  }
-
-  virtual void Init() OVERRIDE {
-  }
-
-  virtual double GetVolumePercent() OVERRIDE {
-    return volume_;
-  }
-
-  virtual void SetVolumePercent(double percent) OVERRIDE {
-    volume_ = percent;
-  }
-
-  virtual bool IsMuted() OVERRIDE {
-    return is_muted_;
-  }
-
-  virtual void SetMuted(bool do_mute) OVERRIDE {
-    is_muted_ = do_mute;
-  }
-
- private:
-  double volume_;
-  bool is_muted_;
-
-  DISALLOW_COPY_AND_ASSIGN(MockAudioMixer);
-};
-
-// This class has to be browsertest because AudioHandler uses prefs_service.
-class VolumeControllerTest : public InProcessBrowserTest {
- public:
-  VolumeControllerTest() {}
-
-  virtual void SetUpOnMainThread() OVERRIDE {
-    // First we should shutdown the default audio handler.
-    chromeos::AudioHandler::Shutdown();
-    audio_mixer_ = new MockAudioMixer;
-    chromeos::AudioHandler::InitializeForTesting(audio_mixer_);
-  }
-
-  virtual void CleanUpOnMainThread() OVERRIDE {
-    chromeos::AudioHandler::Shutdown();
-    audio_mixer_ = NULL;
-  }
-
- protected:
-  void VolumeMute() {
-    volume_controller_.HandleVolumeMute(ui::Accelerator());
-  }
-
-  void VolumeUp() {
-    volume_controller_.HandleVolumeUp(ui::Accelerator());
-  }
-
-  void VolumeDown() {
-    volume_controller_.HandleVolumeDown(ui::Accelerator());
-  }
-
-  MockAudioMixer* audio_mixer() { return audio_mixer_; }
-
- private:
-  VolumeController volume_controller_;
-  MockAudioMixer* audio_mixer_;
-
-  DISALLOW_COPY_AND_ASSIGN(VolumeControllerTest);
-};
-
-IN_PROC_BROWSER_TEST_F(VolumeControllerTest, VolumeUpAndDown) {
-  // Set initial value as 50%
-  audio_mixer()->SetVolumePercent(50.0);
-
-  double initial_volume = audio_mixer()->GetVolumePercent();
-
-  VolumeUp();
-  EXPECT_LT(initial_volume, audio_mixer()->GetVolumePercent());
-  VolumeDown();
-  EXPECT_DOUBLE_EQ(initial_volume, audio_mixer()->GetVolumePercent());
-  VolumeDown();
-  EXPECT_GT(initial_volume, audio_mixer()->GetVolumePercent());
-}
-
-IN_PROC_BROWSER_TEST_F(VolumeControllerTest, VolumeDownToZero) {
-  // Setting to very small
-  audio_mixer()->SetVolumePercent(0.1);
-
-  VolumeDown();
-  EXPECT_DOUBLE_EQ(0.0, audio_mixer()->GetVolumePercent());
-  VolumeDown();
-  EXPECT_DOUBLE_EQ(0.0, audio_mixer()->GetVolumePercent());
-  VolumeUp();
-  EXPECT_LT(0.0, audio_mixer()->GetVolumePercent());
-}
-
-IN_PROC_BROWSER_TEST_F(VolumeControllerTest, VolumeUpTo100) {
-  // Setting to almost max
-  audio_mixer()->SetVolumePercent(99.0);
-
-  VolumeUp();
-  EXPECT_DOUBLE_EQ(100.0, audio_mixer()->GetVolumePercent());
-  VolumeUp();
-  EXPECT_DOUBLE_EQ(100.0, audio_mixer()->GetVolumePercent());
-  VolumeDown();
-  EXPECT_GT(100.0, audio_mixer()->GetVolumePercent());
-}
-
-IN_PROC_BROWSER_TEST_F(VolumeControllerTest, Mutes) {
-  ASSERT_FALSE(audio_mixer()->IsMuted());
-  double initial_volume = audio_mixer()->GetVolumePercent();
-
-  VolumeMute();
-  EXPECT_TRUE(audio_mixer()->IsMuted());
-
-  // Further mute buttons doesn't have effects.
-  VolumeMute();
-  EXPECT_TRUE(audio_mixer()->IsMuted());
-
-  // Right after the volume up after set_mute recovers to original volume.
-  VolumeUp();
-  EXPECT_FALSE(audio_mixer()->IsMuted());
-  EXPECT_DOUBLE_EQ(initial_volume, audio_mixer()->GetVolumePercent());
-
-  VolumeMute();
-  // After the volume down, the volume goes down to zero explicitly.
-  VolumeDown();
-  EXPECT_TRUE(audio_mixer()->IsMuted());
-  EXPECT_DOUBLE_EQ(0.0, audio_mixer()->GetVolumePercent());
-
-  // Thus, further VolumeUp doesn't recover the volume, it's just slightly
-  // bigger than 0.
-  VolumeUp();
-  EXPECT_LT(0.0, audio_mixer()->GetVolumePercent());
-  EXPECT_GT(initial_volume, audio_mixer()->GetVolumePercent());
-}
-
-}  // namespace