Add framework for anomaly detection flags

This cl adds isAnomalyDetectorEnabled(type), which decides whether
to turn on specific check with that type.

Added method is used in AnomalyLoader.

Bug: 36924669
Test: RunSettingsRoboTests
Change-Id: I71c6acb1c58c24453a1936c5c36f59fe4e86cfd4

src/com/android/settings/fuelgauge/PowerUsageFeatureProvider.java

@@ -21,6 +21,7 @@ import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
 import com.android.internal.os.BatterySipper;
+import com.android.settings.fuelgauge.anomaly.Anomaly;
 
 /**
  * Feature Provider used in power usage
@@ -85,4 +86,9 @@ public interface PowerUsageFeatureProvider {
      * Returns the the estimate in the cursor as a long or -1 if the cursor is null
      */
     long getTimeRemainingEstimate(Cursor cursor);
+
+    /**
+     * Check whether a specific anomaly detector is enabled
+     */
+    boolean isAnomalyDetectorEnabled(@Anomaly.AnomalyType int type);
 }

src/com/android/settings/fuelgauge/PowerUsageFeatureProviderImpl.java

@@ -24,6 +24,7 @@ import android.net.Uri;
 import android.os.Process;
 import com.android.internal.os.BatterySipper;
 import com.android.internal.util.ArrayUtils;
+import com.android.settings.fuelgauge.anomaly.Anomaly;
 
 public class PowerUsageFeatureProviderImpl implements PowerUsageFeatureProvider {
 
@@ -111,4 +112,9 @@ public class PowerUsageFeatureProviderImpl implements PowerUsageFeatureProvider
     public long getTimeRemainingEstimate(Cursor cursor) {
         return 0;
     }
+
+    @Override
+    public boolean isAnomalyDetectorEnabled(@Anomaly.AnomalyType int type) {
+        return false;
+    }
 }

src/com/android/settings/fuelgauge/anomaly/Anomaly.java

@@ -45,6 +45,9 @@ public class Anomaly implements Parcelable {
         int FORCE_STOP = 0;
     }
 
+    @AnomalyType
+    public static final int[] ANOMALY_TYPE_LIST = {AnomalyType.WAKE_LOCK};
+
     /**
      * Type of this this anomaly
      */

src/com/android/settings/fuelgauge/anomaly/AnomalyLoader.java

@@ -17,9 +17,11 @@
 package com.android.settings.fuelgauge.anomaly;
 
 import android.content.Context;
+import android.support.annotation.VisibleForTesting;
 
 import com.android.internal.os.BatteryStatsHelper;
-import com.android.settings.fuelgauge.anomaly.checker.WakeLockAnomalyDetector;
+import com.android.settings.fuelgauge.PowerUsageFeatureProvider;
+import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.utils.AsyncLoader;
 
 import java.util.ArrayList;
@@ -29,13 +31,18 @@ import java.util.List;
  * Loader to compute which apps are anomaly and return a anomaly list. It will return
  * an empty list if there is no anomaly.
  */
-//TODO(b/36924669): add test for this file, for now it seems there is nothing to test
 public class AnomalyLoader extends AsyncLoader<List<Anomaly>> {
     private BatteryStatsHelper mBatteryStatsHelper;
+    private PowerUsageFeatureProvider mPowerUsageFeatureProvider;
+    @VisibleForTesting
+    AnomalyUtils mAnomalyUtils;
 
     public AnomalyLoader(Context context, BatteryStatsHelper batteryStatsHelper) {
         super(context);
         mBatteryStatsHelper = batteryStatsHelper;
+        mPowerUsageFeatureProvider = FeatureFactory.getFactory(
+                context).getPowerUsageFeatureProvider(context);
+        mAnomalyUtils = AnomalyUtils.getInstance(context);
     }
 
     @Override
@@ -45,8 +52,12 @@ public class AnomalyLoader extends AsyncLoader<List<Anomaly>> {
     @Override
     public List<Anomaly> loadInBackground() {
         final List<Anomaly> anomalies = new ArrayList<>();
-        anomalies.addAll(new WakeLockAnomalyDetector(getContext())
+        for (@Anomaly.AnomalyType int type : Anomaly.ANOMALY_TYPE_LIST) {
-                .detectAnomalies(mBatteryStatsHelper));
+            if (mPowerUsageFeatureProvider.isAnomalyDetectorEnabled(type)) {
+                anomalies.addAll(mAnomalyUtils.getAnomalyDetector(type).detectAnomalies(
+                        mBatteryStatsHelper));
+            }
+        }
 
         return anomalies;
     }

src/com/android/settings/fuelgauge/anomaly/AnomalyUtils.java

@@ -21,6 +21,8 @@ import android.support.annotation.VisibleForTesting;
 
 import com.android.settings.fuelgauge.anomaly.action.AnomalyAction;
 import com.android.settings.fuelgauge.anomaly.action.ForceStopAction;
+import com.android.settings.fuelgauge.anomaly.checker.AnomalyDetector;
+import com.android.settings.fuelgauge.anomaly.checker.WakeLockAnomalyDetector;
 
 /**
  * Utility class for anomaly detection
@@ -47,7 +49,7 @@ public class AnomalyUtils {
      *
      * @return corresponding {@link AnomalyAction}, or null if cannot find it.
      */
-    public final AnomalyAction getAnomalyAction(@Anomaly.AnomalyType int anomalyType) {
+    public AnomalyAction getAnomalyAction(@Anomaly.AnomalyType int anomalyType) {
         switch (anomalyType) {
             case Anomaly.AnomalyType.WAKE_LOCK:
                 return new ForceStopAction(mContext);
@@ -55,4 +57,19 @@ public class AnomalyUtils {
                 return null;
         }
     }
+
+    /**
+     * Return the corresponding {@link AnomalyDetector} according to
+     * {@link com.android.settings.fuelgauge.anomaly.Anomaly.AnomalyType}
+     *
+     * @return corresponding {@link AnomalyDetector}, or null if cannot find it.
+     */
+    public AnomalyDetector getAnomalyDetector(@Anomaly.AnomalyType int anomalyType) {
+        switch (anomalyType) {
+            case Anomaly.AnomalyType.WAKE_LOCK:
+                return new WakeLockAnomalyDetector(mContext);
+            default:
+                return null;
+        }
+    }
 }

tests/robotests/src/com/android/settings/fuelgauge/anomaly/AnomalyLoaderTest.java

@@ -0,0 +1,88 @@
+/*
+ * 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.fuelgauge.anomaly;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+
+import com.android.internal.os.BatteryStatsHelper;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.fuelgauge.anomaly.checker.WakeLockAnomalyDetector;
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class AnomalyLoaderTest {
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private BatteryStatsHelper mBatteryStatsHelper;
+    private WakeLockAnomalyDetector mWakeLockAnomalyDetector;
+    private Anomaly mWakeLockAnomaly;
+    private List<Anomaly> mWakeLockAnomalies;
+    private AnomalyLoader mAnomalyLoader;
+    private FakeFeatureFactory mFeatureFactory;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        FakeFeatureFactory.setupForTest(mContext);
+        mFeatureFactory = (FakeFeatureFactory) FakeFeatureFactory.getFactory(mContext);
+
+        mWakeLockAnomalyDetector = spy(new WakeLockAnomalyDetector(mContext));
+        mWakeLockAnomalies = new ArrayList<>();
+        mWakeLockAnomaly = new Anomaly.Builder()
+                .setType(Anomaly.AnomalyType.WAKE_LOCK)
+                .build();
+        mWakeLockAnomalies.add(mWakeLockAnomaly);
+
+        mAnomalyLoader = new AnomalyLoader(mContext, mBatteryStatsHelper);
+        mAnomalyLoader.mAnomalyUtils = spy(new AnomalyUtils(mContext));
+    }
+
+    @Test
+    public void testLoadInBackground_containsValidAnomalies() {
+        doReturn(mWakeLockAnomalyDetector).when(mAnomalyLoader.mAnomalyUtils).getAnomalyDetector(
+                Anomaly.AnomalyType.WAKE_LOCK);
+        doReturn(mWakeLockAnomalies).when(mWakeLockAnomalyDetector).detectAnomalies(any());
+        when(mFeatureFactory.powerUsageFeatureProvider.isAnomalyDetectorEnabled(
+                Anomaly.AnomalyType.WAKE_LOCK)).thenReturn(true);
+
+        List<Anomaly> anomalies = mAnomalyLoader.loadInBackground();
+
+        assertThat(anomalies).containsExactly(mWakeLockAnomaly);
+    }
+}

tests/robotests/src/com/android/settings/fuelgauge/anomaly/AnomalyUtilsTest.java

@@ -21,6 +21,7 @@ import static com.google.common.truth.Truth.assertThat;
 import com.android.settings.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
 import com.android.settings.fuelgauge.anomaly.action.ForceStopAction;
+import com.android.settings.fuelgauge.anomaly.checker.WakeLockAnomalyDetector;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -43,4 +44,10 @@ public class AnomalyUtilsTest {
         assertThat(mAnomalyUtils.getAnomalyAction(Anomaly.AnomalyType.WAKE_LOCK)).isInstanceOf(
                 ForceStopAction.class);
     }
+
+    @Test
+    public void testGetAnomalyDetector_typeWakeLock_returnWakeLockDetector() {
+        assertThat(mAnomalyUtils.getAnomalyDetector(Anomaly.AnomalyType.WAKE_LOCK)).isInstanceOf(
+                WakeLockAnomalyDetector.class);
+    }
 }