Add ANGLE enable to Developer Options

Allows selecting a single app to use ANGLE instead
of native drivers via Developer Options. Only non-system
apps will be listed via this interface.

Bug: 80239516
Test: make ROBOTEST_FILTER=AngleEnabledAppPreferenceControllerTest RunSettingsRoboTests
Change-Id: Iddf800cdc1a2607757ee165c456357e041c47ce5
(cherry picked from commit a3ed8214bf5903e4dea8df5f3516a95d81d8c485)

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

@@ -0,0 +1,138 @@
+/*
+ * 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.android.settings.development.DevelopmentOptionsActivityRequestCodes.REQUEST_CODE_ANGLE_ENABLED_APP;
+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.app.Activity;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+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.RuntimeEnvironment;
+import org.robolectric.util.ReflectionHelpers;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class AngleEnabledAppPreferenceControllerTest {
+
+    @Mock
+    private Preference mPreference;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+    @Mock
+    private DevelopmentSettingsDashboardFragment mFragment;
+    @Mock
+    private PackageManager mPackageManager;
+
+    private Context mContext;
+    private AngleEnabledAppPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = spy(new AngleEnabledAppPreferenceController(mContext, mFragment));
+        ReflectionHelpers
+            .setField(mController, "mPackageManager" /* field name */, mPackageManager);
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey()))
+            .thenReturn(mPreference);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @Test
+    public void handlePreferenceTreeClick_preferenceClicked_launchActivity() {
+        final Intent activityStartIntent = new Intent(mContext, AppPicker.class);
+        final String preferenceKey = mController.getPreferenceKey();
+        doReturn(activityStartIntent).when(mController).getActivityStartIntent();
+        when(mPreference.getKey()).thenReturn(preferenceKey);
+        mController.handlePreferenceTreeClick(mPreference);
+
+        verify(mFragment).startActivityForResult(activityStartIntent,
+                REQUEST_CODE_ANGLE_ENABLED_APP);
+    }
+
+    @Test
+    public void updateState_foobarAppSelected_shouldUpdateSummaryWithAngleEnabledAppLabel() {
+        final String angleEnabledApp = "foobar";
+        final ContentResolver contentResolver = mContext.getContentResolver();
+        Settings.Global.putString(contentResolver, Settings.Global.ANGLE_ENABLED_APP,
+                angleEnabledApp);
+        mController.updateState(mPreference);
+
+        verify(mPreference).setSummary(
+                mContext.getString(R.string.angle_enabled_app_set, angleEnabledApp));
+    }
+
+    @Test
+    public void updateState_noAppSelected_shouldUpdateSummaryWithNoAppSelected() {
+        final String angleEnabledApp = null;
+        final ContentResolver contentResolver = mContext.getContentResolver();
+        Settings.Global.putString(contentResolver, Settings.Global.ANGLE_ENABLED_APP,
+                angleEnabledApp);
+        mController.updateState(mPreference);
+
+        verify(mPreference).setSummary(
+            mContext.getString(R.string.angle_enabled_app_not_set));
+    }
+
+    @Test
+    public void onActivityResult_foobarAppSelected_shouldUpdateSummaryWithAngleEnabledLabel() {
+        Intent activityResultIntent = new Intent(mContext, AppPicker.class);
+        final String appLabel = "foobar";
+        activityResultIntent.setAction(appLabel);
+        final boolean result = mController
+            .onActivityResult(REQUEST_CODE_ANGLE_ENABLED_APP, Activity.RESULT_OK,
+                    activityResultIntent);
+
+        assertThat(result).isTrue();
+        verify(mPreference).setSummary(
+                mContext.getString(R.string.angle_enabled_app_set, appLabel));
+    }
+
+    @Test
+    public void onActivityResult_badRequestCode_shouldReturnFalse() {
+        assertThat(mController.onActivityResult(
+                -1 /* requestCode */, -1 /* resultCode */, null /* intent */)).isFalse();
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchDisabled_shouldDisablePreference() {
+        mController.onDeveloperOptionsSwitchDisabled();
+
+        assertThat(mPreference.isEnabled()).isFalse();
+        verify(mPreference).setSummary(
+                mContext.getString(R.string.angle_enabled_app_not_set));
+    }
+}