Update SoundSettings to extend DashboardFragment.

- initial round of refactoring SoundSettings to use DashboardFragment.
- add controller for Cast, Do not disturb, Alarm volume, Media volume,
  Ring volume and Notification volume.

Bug: 32276590
Test: make RunSettingsRoboTests
Change-Id: I5c02a344bff5117bfce93d7ccac650fccc82d2b0

tests/robotests/src/com/android/settings/notification/VolumeSeekBarPreferenceControllerTest.java

@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.notification;
+
+import android.content.Context;
+import android.preference.SeekBarVolumizer;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class VolumeSeekBarPreferenceControllerTest {
+
+    @Mock
+    private Context mContext;
+    @Mock
+    private PreferenceScreen mScreen;
+    @Mock
+    private VolumeSeekBarPreference mPreference;
+    @Mock
+    private VolumeSeekBarPreference.Callback mCallback;
+
+    private VolumeSeekBarPreferenceControllerTestable mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mScreen.findPreference(anyString())).thenReturn(mPreference);
+        mController =
+            new VolumeSeekBarPreferenceControllerTestable(mContext, mCallback);
+    }
+
+    @Test
+    public void displayPreference_available_shouldUpdatePreference() {
+        mController.displayPreference(mScreen);
+
+        verify(mPreference).setCallback(mCallback);
+        verify(mPreference).setStream(mController.AUDIO_STREAM);
+        verify(mPreference).setMuteIcon(mController.MUTE_ICON);
+    }
+
+    @Test
+    public void displayPreference_notAvailable_shouldNotUpdatePreference() {
+        mController =
+            new VolumeSeekBarPreferenceControllerTestable(mContext, mCallback, false);
+
+        mController.displayPreference(mScreen);
+
+        verify(mPreference, never()).setCallback(any(VolumeSeekBarPreference.Callback.class));
+        verify(mPreference, never()).setStream(anyInt());
+        verify(mPreference, never()).setMuteIcon(anyInt());
+    }
+
+    @Test
+    public void onResume_shouldResumePreference() {
+        mController.displayPreference(mScreen);
+
+        mController.onResume();
+
+        verify(mPreference).onActivityResume();
+    }
+
+    @Test
+    public void onPause_shouldPausePreference() {
+        mController.displayPreference(mScreen);
+
+        mController.onPause();
+
+        verify(mPreference).onActivityPause();
+    }
+
+    private class VolumeSeekBarPreferenceControllerTestable extends
+        VolumeSeekBarPreferenceController {
+
+        private final static int AUDIO_STREAM = 1;
+        private final static int MUTE_ICON = 2;
+
+        private boolean mAvailable;
+
+        VolumeSeekBarPreferenceControllerTestable(Context context,
+            VolumeSeekBarPreference.Callback callback) {
+            this(context, callback, true);
+        }
+
+        VolumeSeekBarPreferenceControllerTestable(Context context,
+            VolumeSeekBarPreference.Callback callback, boolean available) {
+            super(context, callback, null);
+            mAvailable = available;
+        }
+
+        @Override
+        public String getPreferenceKey() {
+            return null;
+        }
+
+        @Override
+        public boolean handlePreferenceTreeClick(Preference preference) {
+            return false;
+        }
+
+        @Override
+        public boolean isAvailable() {
+            return mAvailable;
+        }
+
+        @Override
+        public int getAudioStream() {
+            return AUDIO_STREAM;
+        }
+
+        @Override
+        public int getMuteIcon() {
+            return MUTE_ICON;
+        }
+
+        private void setAvailable(boolean available) {
+
+        }
+    }
+
+}