Create a permission bar chart in Privacy page

Using PermissionControllerManager to get the apps
usage of different permission groups.

And then we visualize the result with bar chart.

Test: visual, robotest
Fixes: 116628158
Change-Id: I0442a04c35d74f715418fac0279bb8f36f6d64df

tests/robotests/src/com/android/settings/privacy/PermissionBarChartPreferenceControllerTest.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2019 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.privacy;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE_UNSEARCHABLE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.permission.RuntimePermissionUsageInfo;
+
+import androidx.preference.PreferenceScreen;
+
+import com.android.settingslib.widget.BarChartInfo;
+import com.android.settingslib.widget.BarChartPreference;
+import com.android.settingslib.widget.BarViewInfo;
+
+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;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(RobolectricTestRunner.class)
+public class PermissionBarChartPreferenceControllerTest {
+
+    @Mock
+    private PreferenceScreen mScreen;
+
+    private PermissionBarChartPreferenceController mController;
+    private BarChartPreference mPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        Context Context = RuntimeEnvironment.application;
+        mController = new PermissionBarChartPreferenceController(Context, "test_key");
+        mPreference = spy(new BarChartPreference(Context));
+        when(mScreen.findPreference(mController.getPreferenceKey()))
+                .thenReturn((BarChartPreference) mPreference);
+    }
+
+    @Test
+    public void getAvailabilityStatus_shouldReturnAvailableUnsearchable() {
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE_UNSEARCHABLE);
+    }
+
+    @Test
+    public void displayPreference_shouldInitializeBarChart() {
+        mController.displayPreference(mScreen);
+
+        verify(mPreference).initializeBarChart(any(BarChartInfo.class));
+    }
+
+    @Test
+    public void onPermissionUsageResult_differentPermissionResultSet_shouldSetBarViewInfos() {
+        final List<RuntimePermissionUsageInfo> infos1 = new ArrayList<>();
+        final RuntimePermissionUsageInfo info1 =
+                new RuntimePermissionUsageInfo("permission 1", 10);
+        infos1.add(info1);
+        mController.displayPreference(mScreen);
+        mController.onPermissionUsageResult(infos1);
+
+        verify(mPreference).setBarViewInfos(any(BarViewInfo[].class));
+
+        final List<RuntimePermissionUsageInfo> infos2 = new ArrayList<>();
+        final RuntimePermissionUsageInfo info2 =
+                new RuntimePermissionUsageInfo("permission 2", 20);
+        infos2.add(info2);
+        mController.onPermissionUsageResult(infos2);
+
+        verify(mPreference, times(2)).setBarViewInfos(any(BarViewInfo[].class));
+    }
+
+    @Test
+    public void onPermissionUsageResult_samePermissionResultSet_shouldNotSetBarViewInfos() {
+        final List<RuntimePermissionUsageInfo> mInfos = new ArrayList<>();
+        final RuntimePermissionUsageInfo info1 =
+                new RuntimePermissionUsageInfo("permission 1", 10);
+        mInfos.add(info1);
+        mController.displayPreference(mScreen);
+        mController.onPermissionUsageResult(mInfos);
+
+        mController.onPermissionUsageResult(mInfos);
+
+        verify(mPreference, times(1)).setBarViewInfos(any(BarViewInfo[].class));
+    }
+}