DisplayCutout: Add emulation option to DeveloperSettings

Bug: 65689439
Test: Go to Developer Settings > Toggle "Emulate display with a cutout"
Change-Id: Id3387c026df9868d42e0a7b0d7e623115f41452b

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

@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2018 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.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.om.IOverlayManager;
+import android.content.om.OverlayInfo;
+import android.support.v7.preference.TwoStatePreference;
+
+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;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class EmulateDisplayCutoutPreferenceControllerTest {
+
+    @Mock Context mContext;
+    @Mock IOverlayManager mOverlayManager;
+    @Mock TwoStatePreference mPreference;
+    EmulateDisplayCutoutPreferenceController mController;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(DISABLED);
+        mController = new EmulateDisplayCutoutPreferenceController(mContext, mOverlayManager);
+        mController.setPreference(mPreference);
+    }
+
+    @Test
+    public void isAvailable_true() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(DISABLED);
+
+        assertThat(new EmulateDisplayCutoutPreferenceController(mContext, mOverlayManager)
+                .isAvailable()).isTrue();
+    }
+
+    @Test
+    public void isAvailable_false() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(null);
+
+        assertThat(new EmulateDisplayCutoutPreferenceController(mContext, mOverlayManager)
+                .isAvailable()).isFalse();
+    }
+
+    @Test
+    public void onPreferenceChange_enable() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(DISABLED);
+
+        mController.onPreferenceChange(null, true);
+
+        verify(mOverlayManager).setEnabled(any(), eq(true), anyInt());
+    }
+
+    @Test
+    public void onPreferenceChange_disable() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(ENABLED);
+
+        mController.onPreferenceChange(null, false);
+
+        verify(mOverlayManager).setEnabled(any(), eq(false), anyInt());
+    }
+
+    @Test
+    public void updateState_enabled() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(ENABLED);
+
+        mController.updateState(null);
+
+        verify(mPreference).setChecked(true);
+    }
+
+    @Test
+    public void updateState_disabled() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(DISABLED);
+
+        mController.updateState(null);
+
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchEnabled() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(DISABLED);
+
+        mController.onDeveloperOptionsSwitchEnabled();
+
+        verify(mPreference).setEnabled(true);
+        verify(mOverlayManager, never()).setEnabled(any(), eq(true), anyInt());
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchDisabled() throws Exception {
+        when(mOverlayManager.getOverlayInfo(any(), anyInt())).thenReturn(ENABLED);
+
+        mController.onDeveloperOptionsSwitchDisabled();
+
+        verify(mPreference).setEnabled(false);
+        verify(mPreference).setChecked(false);
+        verify(mOverlayManager).setEnabled(any(), eq(false), anyInt());
+    }
+
+    static final OverlayInfo ENABLED = new OverlayInfo() {
+        @Override
+        public boolean isEnabled() {
+            return true;
+        }
+    };
+
+    static final OverlayInfo DISABLED = new OverlayInfo() {
+        @Override
+        public boolean isEnabled() {
+            return false;
+        }
+    };
+
+}