Add intent receiver in BatterySaverCondition

Receive ACTION_POWER_SAVE_MODE_CHANGING
to listen state and update immediately.

Change-Id: Iff2ebb262d95f43d0c970b32f326e3a3e6981a2a
Fixes: 78104542
Test: make RunSettingsRoboTests

src/com/android/settings/dashboard/conditional/BatterySaverCondition.java

@@ -23,12 +23,20 @@ import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
 import com.android.settings.core.SubSettingLauncher;
 import com.android.settings.fuelgauge.BatterySaverDrawable;
+import com.android.settings.fuelgauge.BatterySaverReceiver;
 import com.android.settings.fuelgauge.batterysaver.BatterySaverSettings;
 import com.android.settingslib.fuelgauge.BatterySaverUtils;
 
-public class BatterySaverCondition extends Condition {
+public class BatterySaverCondition extends Condition implements
+        BatterySaverReceiver.BatterySaverListener {
+
+    private final BatterySaverReceiver mReceiver;
+
     public BatterySaverCondition(ConditionManager manager) {
         super(manager);
+
+        mReceiver = new BatterySaverReceiver(manager.getContext());
+        mReceiver.setBatterySaverListener(this);
     }
 
     @Override
@@ -54,7 +62,7 @@ public class BatterySaverCondition extends Condition {
 
     @Override
     public CharSequence[] getActions() {
-        return new CharSequence[] {mManager.getContext().getString(R.string.condition_turn_off)};
+        return new CharSequence[]{mManager.getContext().getString(R.string.condition_turn_off)};
     }
 
     @Override
@@ -82,4 +90,25 @@ public class BatterySaverCondition extends Condition {
     public int getMetricsConstant() {
         return MetricsEvent.SETTINGS_CONDITION_BATTERY_SAVER;
     }
+
+    @Override
+    public void onResume() {
+        mReceiver.setListening(true);
+    }
+
+    @Override
+    public void onPause() {
+        mReceiver.setListening(false);
+    }
+
+    @Override
+    public void onPowerSaveModeChanged() {
+        ConditionManager.get(mManager.getContext()).getCondition(BatterySaverCondition.class)
+                        .refreshState();
+    }
+
+    @Override
+    public void onBatteryChanged(boolean pluggedIn) {
+        // do nothing
+    }
 }

tests/robotests/src/com/android/settings/dashboard/conditional/BatterySaverConditionTest.java

@@ -0,0 +1,103 @@
+/*
+ * 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.dashboard.conditional;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Matchers.any;
+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.IntentFilter;
+import android.os.PowerManager;
+
+import com.android.settings.R;
+import com.android.settings.fuelgauge.BatterySaverReceiver;
+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.Shadows;
+import org.robolectric.shadows.ShadowPowerManager;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class BatterySaverConditionTest {
+    @Mock
+    private ConditionManager mConditionManager;
+
+    private ShadowPowerManager mPowerManager;
+    private Context mContext;
+    private BatterySaverCondition mCondition;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(RuntimeEnvironment.application);
+        mPowerManager = Shadows.shadowOf(mContext.getSystemService(PowerManager.class));
+        when(mConditionManager.getContext()).thenReturn(mContext);
+        mCondition = spy(new BatterySaverCondition(mConditionManager));
+    }
+
+    @Test
+    public void verifyText() {
+        assertThat(mCondition.getTitle()).isEqualTo(
+                mContext.getText(R.string.condition_battery_title));
+        assertThat(mCondition.getSummary()).isEqualTo(
+                mContext.getText(R.string.condition_battery_summary));
+        assertThat(mCondition.getActions()[0]).isEqualTo(
+                mContext.getText(R.string.condition_turn_off));
+    }
+
+    @Test
+    public void onResume_shouldRegisterReceiver() {
+        mCondition.onResume();
+
+        verify(mContext).registerReceiver(any(BatterySaverReceiver.class), any(IntentFilter.class));
+    }
+
+    @Test
+    public void onPause_shouldUnregisterReceiver() {
+        mCondition.onResume();
+        mCondition.onPause();
+
+        verify(mContext).unregisterReceiver(any(BatterySaverReceiver.class));
+    }
+
+    @Test
+    public void refreshState_PowerSaverOn_shouldActivate() {
+        mPowerManager.setIsPowerSaveMode(true);
+
+        mCondition.refreshState();
+
+        assertThat(mCondition.isActive()).isTrue();
+    }
+
+    @Test
+    public void refreshState_PowerSaverOff_shouldNotActivate() {
+        mPowerManager.setIsPowerSaveMode(false);
+
+        mCondition.refreshState();
+
+        assertThat(mCondition.isActive()).isFalse();
+    }
+}