Add kill-switch to distinguish chart or non-chart design

Bug: 184807417
Bug: 180607918
Test: make SettingsRoboTests
Test: make SettingsGoogleRoboTests
Change-Id: Iacbb012209d552b58b774f90f5b0aeb60ce6d33d

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

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2021 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 android.content.Context;
+
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public final class BatteryHistoryLoaderTest {
+
+    private Context mContext;
+    private FakeFeatureFactory mFeatureFactory;
+    private BatteryHistoryLoader mBatteryHistoryLoader;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = RuntimeEnvironment.application;
+        mFeatureFactory = FakeFeatureFactory.setupForTest();
+        mBatteryHistoryLoader = new BatteryHistoryLoader(mContext);
+    }
+
+    @Test
+    public void testLoadIBackground_returnsMapFromPowerFeatureProvider() {
+        final Map<Long, List<BatteryHistEntry>> batteryHistoryMap = new HashMap<>();
+        doReturn(batteryHistoryMap).when(mFeatureFactory.powerUsageFeatureProvider)
+                .getBatteryHistory(mContext);
+
+        assertThat(mBatteryHistoryLoader.loadInBackground())
+                .isSameInstanceAs(batteryHistoryMap);
+    }
+}