Make volume sliders sliceable

Test: make -j RunSettingsRoboTests
Change-Id: I8495770792dfdada54174ca61937f336e4fc219c
Fixes: 67997207

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

@@ -16,6 +16,7 @@
 
 package com.android.settings.notification;
 
+import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.ArgumentMatchers.nullable;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyInt;
@@ -46,6 +47,8 @@ public class VolumeSeekBarPreferenceControllerTest {
     private VolumeSeekBarPreference mPreference;
     @Mock
     private VolumeSeekBarPreference.Callback mCallback;
+    @Mock
+    private AudioHelper mHelper;
 
     private VolumeSeekBarPreferenceControllerTestable mController;
 
@@ -53,7 +56,10 @@ public class VolumeSeekBarPreferenceControllerTest {
     public void setUp() {
         MockitoAnnotations.initMocks(this);
         when(mScreen.findPreference(nullable(String.class))).thenReturn(mPreference);
-        mController = new VolumeSeekBarPreferenceControllerTestable(mContext, mCallback);
+        when(mPreference.getKey()).thenReturn("key");
+        mController = new VolumeSeekBarPreferenceControllerTestable(mContext, mCallback,
+                mPreference.getKey());
+        mController.setAudioHelper(mHelper);
     }
 
     @Test
@@ -67,7 +73,8 @@ public class VolumeSeekBarPreferenceControllerTest {
 
     @Test
     public void displayPreference_notAvailable_shouldNotUpdatePreference() {
-        mController = new VolumeSeekBarPreferenceControllerTestable(mContext, mCallback, false);
+        mController = new VolumeSeekBarPreferenceControllerTestable(mContext, mCallback, false,
+                mPreference.getKey());
 
         mController.displayPreference(mScreen);
 
@@ -94,6 +101,42 @@ public class VolumeSeekBarPreferenceControllerTest {
         verify(mPreference).onActivityPause();
     }
 
+    @Test
+    public void sliderMethods_handleNullPreference() {
+        when(mHelper.getStreamVolume(mController.getAudioStream())).thenReturn(4);
+        when(mHelper.getMaxVolume(mController.getAudioStream())).thenReturn(10);
+
+        assertThat(mController.getMaxSteps()).isEqualTo(10);
+        assertThat(mController.getSliderPosition()).isEqualTo(4);
+
+        mController.setSliderPosition(9);
+        verify(mHelper).setStreamVolume(mController.getAudioStream(), 9);
+    }
+
+    @Test
+    public void setSliderPosition_passesAlongValue() {
+        mController.displayPreference(mScreen);
+
+        mController.setSliderPosition(2);
+        verify(mPreference).setProgress(2);
+    }
+
+    @Test
+    public void getMaxSteps_passesAlongValue() {
+        when(mPreference.getMax()).thenReturn(6);
+        mController.displayPreference(mScreen);
+
+        assertThat(mController.getMaxSteps()).isEqualTo(6);
+    }
+
+    @Test
+    public void getSliderPosition_passesAlongValue() {
+        when(mPreference.getProgress()).thenReturn(7);
+        mController.displayPreference(mScreen);
+
+        assertThat(mController.getSliderPosition()).isEqualTo(7);
+    }
+
     private class VolumeSeekBarPreferenceControllerTestable
         extends VolumeSeekBarPreferenceController {
 
@@ -103,19 +146,20 @@ public class VolumeSeekBarPreferenceControllerTest {
         private boolean mAvailable;
 
         VolumeSeekBarPreferenceControllerTestable(Context context,
-            VolumeSeekBarPreference.Callback callback) {
-            this(context, callback, true);
+            VolumeSeekBarPreference.Callback callback, String key) {
+            this(context, callback, true, key);
         }
 
         VolumeSeekBarPreferenceControllerTestable(Context context,
-            VolumeSeekBarPreference.Callback callback, boolean available) {
-            super(context, callback, null);
+            VolumeSeekBarPreference.Callback callback, boolean available, String key) {
+            super(context, key);
+            setCallback(callback);
             mAvailable = available;
         }
 
         @Override
         public String getPreferenceKey() {
-            return null;
+            return "key";
         }
 
         @Override
@@ -124,8 +168,8 @@ public class VolumeSeekBarPreferenceControllerTest {
         }
 
         @Override
-        public boolean isAvailable() {
-            return mAvailable;
+        public int getAvailabilityStatus() {
+            return mAvailable ? AVAILABLE : DISABLED_UNSUPPORTED;
         }
 
         @Override