Introduce HardwareOverlaysPreferenceController

- Create new HardwareOverlaysPreferenceController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller
 - Added ShadowParcel to help with testing
 HardwareOverlaysPreferenceController and
 ShowSurfaceUpdatesPreferenceController

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: Ib6b9679f2a2d2ec84f91da5ac0b68cb2b21eea72

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

@@ -0,0 +1,136 @@
+/*
+ * 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.android.settings.development.HardwareOverlaysPreferenceController
+        .SURFACE_FLINGER_READ_CODE;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+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;
+import org.robolectric.util.ReflectionHelpers;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class HardwareOverlaysPreferenceControllerTest {
+
+    @Mock
+    private Context mContext;
+    @Mock
+    private PreferenceScreen mScreen;
+    @Mock
+    private SwitchPreference mPreference;
+    @Mock
+    private IBinder mSurfaceFlinger;
+
+    private HardwareOverlaysPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mController = spy(new HardwareOverlaysPreferenceController(mContext));
+        ReflectionHelpers.setField(mController, "mSurfaceFlinger", mSurfaceFlinger);
+        doNothing().when(mController).writeHardwareOverlaysSetting(anyBoolean());
+        when(mScreen.findPreference(mController.getPreferenceKey())).thenReturn(mPreference);
+        mController.displayPreference(mScreen);
+    }
+
+    @Test
+    public void onPreferenceChange_settingToggledOn_shouldWriteTrueToHardwareOverlaysSetting() {
+        mController.onPreferenceChange(mPreference, true /* new value */);
+
+        verify(mController).writeHardwareOverlaysSetting(true);
+    }
+
+    @Test
+    public void onPreferenceChange_settingToggledOff_shouldWriteFalseToHardwareOverlaysSetting() {
+        mController.onPreferenceChange(mPreference, false /* new value */);
+
+        verify(mController).writeHardwareOverlaysSetting(false);
+    }
+
+    @Test
+    @Config(shadows = {ShadowParcel.class})
+    public void updateState_settingEnabled_shouldCheckPreference() throws RemoteException {
+        ShadowParcel.sReadIntResult = 1;
+        doReturn(true).when(mSurfaceFlinger).transact(eq(SURFACE_FLINGER_READ_CODE), any(), any(),
+                eq(0 /* flags */));
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(true);
+    }
+
+    @Test
+    @Config(shadows = {ShadowParcel.class})
+    public void updateState_settingDisabled_shouldUnCheckPreference() throws RemoteException {
+        ShadowParcel.sReadIntResult = 0;
+        doReturn(true).when(mSurfaceFlinger).transact(eq(SURFACE_FLINGER_READ_CODE), any(), any(),
+                eq(0 /* flags */));
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchDisabled_preferenceChecked_shouldTurnOffPreference() {
+        when(mPreference.isChecked()).thenReturn(true);
+        mController.onDeveloperOptionsSwitchDisabled();
+
+        verify(mController).writeHardwareOverlaysSetting(false);
+        verify(mPreference).setChecked(false);
+        verify(mPreference).setEnabled(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchDisabled_preferenceUnchecked_shouldNotTurnOffPreference() {
+        when(mPreference.isChecked()).thenReturn(false);
+        mController.onDeveloperOptionsSwitchDisabled();
+
+        verify(mController, never()).writeHardwareOverlaysSetting(anyBoolean());
+        verify(mPreference, never()).setChecked(anyBoolean());
+        verify(mPreference).setEnabled(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchEnabled_shouldEnablePreference() {
+        mController.onDeveloperOptionsSwitchEnabled();
+
+        verify(mPreference).setEnabled(true);
+    }
+}