Introduce PictureColorModePreferenceController

- Create new PictureColorModePreferenceController
 - Create controller inside the DashboardFragment
 - Refactor ColorModePreference so isAvailable() no longer depends on
 ColorModePreference
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I8dff5b0d5ad1d7f043fc7ead540b2c0c960933e3

tests/robotests/src/com/android/settings/development/DevelopmentSettingsDashboardFragmentTest.java

@@ -112,6 +112,9 @@ public class DevelopmentSettingsDashboardFragmentTest {
     }
 
     @Test
+    @Config(shadows = {
+            ShadowPictureColorModePreferenceController.class
+    })
     public void searchIndex_pageEnabled_shouldNotAddKeysToNonIndexable() {
         final Context appContext = RuntimeEnvironment.application;
         DevelopmentSettingsEnabler.setDevelopmentSettingsEnabled(appContext, true);
@@ -198,4 +201,13 @@ public class DevelopmentSettingsDashboardFragmentTest {
             mShown = true;
         }
     }
+
+    @Implements(PictureColorModePreferenceController.class)
+    public static class ShadowPictureColorModePreferenceController {
+
+        @Implementation
+        public boolean isAvailable() {
+            return true;
+        }
+    }
 }

tests/robotests/src/com/android/settings/development/PictureColorModePreferenceControllerTest.java

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2017 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.development;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class PictureColorModePreferenceControllerTest {
+
+    @Mock
+    private ColorModePreference mPreference;
+    @Mock
+    private Context mContext;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+    @Mock
+    private Resources mResources;
+
+    private Lifecycle mLifecycle;
+    private PictureColorModePreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mLifecycle = new Lifecycle();
+        mController = new PictureColorModePreferenceController(mContext, mLifecycle);
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey())).thenReturn(
+                mPreference);
+        when(mContext.getResources()).thenReturn(mResources);
+        when(mResources.getIntArray(R.array.color_mode_ids)).thenReturn(new int[0]);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @Test
+    public void isAvailable_shouldReturnFalseWhenWideColorGambit() {
+        mController = spy(mController);
+        doReturn(2).when(mController).getColorModeDescriptionsSize();
+        doReturn(true).when(mController).isWideColorGamut();
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_shouldReturnTrueWhenNotWideColorGambit() {
+        mController = spy(mController);
+        doReturn(2).when(mController).getColorModeDescriptionsSize();
+        doReturn(false).when(mController).isWideColorGamut();
+
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void isAvailable_shouldReturnFalseWhenColorCountIsOne() {
+        mController = spy(mController);
+        doReturn(1).when(mController).getColorModeDescriptionsSize();
+        doReturn(true).when(mController).isWideColorGamut();
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_shouldReturnTrueWhenColorCountIsTwo() {
+        mController = spy(mController);
+        doReturn(2).when(mController).getColorModeDescriptionsSize();
+        doReturn(false).when(mController).isWideColorGamut();
+
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void onDeveloperOptionEnabled_shouldEnablePreference() {
+        mController = spy(mController);
+        doReturn(true).when(mController).isAvailable();
+        mController.onDeveloperOptionsEnabled();
+
+        verify(mPreference).setEnabled(true);
+    }
+
+    @Test
+    public void onDeveloperOptionDisabled_shouldDisablePreference() {
+        mController = spy(mController);
+        doReturn(true).when(mController).isAvailable();
+        mController.onDeveloperOptionsDisabled();
+
+        verify(mPreference).setEnabled(false);
+    }
+
+    @Test
+    public void onResume_shouldStartListening() {
+        mLifecycle.onResume();
+
+        verify(mPreference).startListening();
+    }
+
+    @Test
+    public void onPause_shouldStopListening() {
+        mLifecycle.onPause();
+
+        verify(mPreference).stopListening();
+    }
+}