Refactor background optimization mode in Power Usage Detail page.

[Screenshot]:
before: https://screenshot.googleplex.com/6m5jYWHofY2pFov

after:
[App battery usage]
- [normal] https://screenshot.googleplex.com/7aurWk7cHKaWds7
- [always unrestried/optimized] https://screenshot.googleplex.com/3rGAh4ccUYTKBAr

[Allow Background usage]
- [Restricted]: https://screenshot.googleplex.com/MPXjQe5kPWw2nhr
- [Optimized]: https://screenshot.googleplex.com/6w4zTT6r34APnGc
- [Unrestricted]: https://screenshot.googleplex.com/97FgvHWMrwASqYH

Bug: 302063050
Bug: 306295660
Bug: 308359833
Test: manual
Change-Id: I3237d015549fe26e62d6d68c13403cc2cbdf0017

tests/robotests/src/com/android/settings/fuelgauge/AllowBackgroundPreferenceControllerTest.java

@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2023 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.fuelgauge;
+
+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.when;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+
+import com.android.settingslib.widget.MainSwitchPreference;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class AllowBackgroundPreferenceControllerTest {
+    private static final int UID = 12345;
+    private static final String PACKAGE_NAME = "com.android.app";
+
+    private AllowBackgroundPreferenceController mController;
+    private MainSwitchPreference mMainSwitchPreference;
+    private BatteryOptimizeUtils mBatteryOptimizeUtils;
+
+    @Mock private PackageManager mMockPackageManager;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+
+        Context context = spy(RuntimeEnvironment.application);
+        BatteryUtils.getInstance(context).reset();
+        doReturn(UID)
+                .when(mMockPackageManager)
+                .getPackageUid(PACKAGE_NAME, PackageManager.GET_META_DATA);
+
+        mController = new AllowBackgroundPreferenceController(context, UID, PACKAGE_NAME);
+        mMainSwitchPreference = new MainSwitchPreference(RuntimeEnvironment.application);
+        mBatteryOptimizeUtils = spy(new BatteryOptimizeUtils(context, UID, PACKAGE_NAME));
+        mController.mBatteryOptimizeUtils = mBatteryOptimizeUtils;
+    }
+
+    @Test
+    public void testUpdateState_isValidPackage_prefEnabled() {
+        when(mBatteryOptimizeUtils.isDisabledForOptimizeModeOnly()).thenReturn(false);
+        when(mBatteryOptimizeUtils.isSystemOrDefaultApp()).thenReturn(false);
+
+        mController.updateState(mMainSwitchPreference);
+
+        assertThat(mBatteryOptimizeUtils.isOptimizeModeMutable()).isTrue();
+        assertThat(mMainSwitchPreference.isEnabled()).isTrue();
+    }
+
+    @Test
+    public void testUpdateState_invalidPackage_prefDisabled() {
+        when(mBatteryOptimizeUtils.isDisabledForOptimizeModeOnly()).thenReturn(true);
+        when(mBatteryOptimizeUtils.isSystemOrDefaultApp()).thenReturn(false);
+
+        mController.updateState(mMainSwitchPreference);
+
+        assertThat(mBatteryOptimizeUtils.isOptimizeModeMutable()).isFalse();
+        assertThat(mMainSwitchPreference.isEnabled()).isFalse();
+    }
+
+    @Test
+    public void testUpdateState_isSystemOrDefaultAppAndRestrictedStates_prefChecked() {
+        when(mBatteryOptimizeUtils.isDisabledForOptimizeModeOnly()).thenReturn(false);
+        when(mBatteryOptimizeUtils.isSystemOrDefaultApp()).thenReturn(true);
+        when(mBatteryOptimizeUtils.getAppOptimizationMode()).thenReturn(
+                BatteryOptimizeUtils.MODE_RESTRICTED);
+
+        mController.updateState(mMainSwitchPreference);
+
+        assertThat(mMainSwitchPreference.isEnabled()).isFalse();
+        assertThat(mMainSwitchPreference.isChecked()).isFalse();
+    }
+
+    @Test
+    public void testUpdateState_isSystemOrDefaultApp_prefUnchecked() {
+        when(mBatteryOptimizeUtils.isDisabledForOptimizeModeOnly()).thenReturn(false);
+        when(mBatteryOptimizeUtils.isSystemOrDefaultApp()).thenReturn(true);
+        when(mBatteryOptimizeUtils.getAppOptimizationMode()).thenReturn(
+                BatteryOptimizeUtils.MODE_OPTIMIZED);
+
+        mController.updateState(mMainSwitchPreference);
+
+        assertThat(mMainSwitchPreference.isEnabled()).isFalse();
+        assertThat(mMainSwitchPreference.isChecked()).isTrue();
+    }
+
+    @Test
+    public void testUpdateState_isRestrictedStates_prefChecked() {
+        when(mBatteryOptimizeUtils.isOptimizeModeMutable()).thenReturn(true);
+        when(mBatteryOptimizeUtils.getAppOptimizationMode()).thenReturn(
+                BatteryOptimizeUtils.MODE_RESTRICTED);
+
+        mController.updateState(mMainSwitchPreference);
+
+        assertThat(mMainSwitchPreference.isEnabled()).isTrue();
+        assertThat(mMainSwitchPreference.isChecked()).isFalse();
+    }
+
+    @Test
+    public void testUpdateState_prefUnchecked() {
+        when(mBatteryOptimizeUtils.isOptimizeModeMutable()).thenReturn(true);
+        when(mBatteryOptimizeUtils.getAppOptimizationMode()).thenReturn(
+                BatteryOptimizeUtils.MODE_OPTIMIZED);
+
+        mController.updateState(mMainSwitchPreference);
+
+        assertThat(mMainSwitchPreference.isEnabled()).isTrue();
+        assertThat(mMainSwitchPreference.isChecked()).isTrue();
+    }
+
+    @Test
+    public void testHandlePreferenceTreeClick_samePrefKey_verifyAction() {
+        mMainSwitchPreference.setKey(
+                AllowBackgroundPreferenceController.KEY_ALLOW_BACKGROUND_USAGE);
+        mController.handlePreferenceTreeClick(mMainSwitchPreference);
+
+        assertThat(mController.handlePreferenceTreeClick(mMainSwitchPreference)).isTrue();
+    }
+
+    @Test
+    public void testHandlePreferenceTreeClick_incorrectPrefKey_noAction() {
+        assertThat(mController.handlePreferenceTreeClick(mMainSwitchPreference)).isFalse();
+    }
+}