Add summary to Notification Assistant picker

Test: manual
Test: atest
Fixes: 126200103
Change-Id: I9569ca7dd58184242fe740e3db63bd7958042cfb

src/com/android/settings/notification/NotificationAssistantPreferenceController.java

@@ -16,18 +16,46 @@
 
 package com.android.settings.notification;
 
+import android.content.ComponentName;
 import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.UserHandle;
 
 import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.applications.DefaultAppInfo;
+import com.android.settingslib.widget.CandidateInfo;
+
+import com.google.common.annotations.VisibleForTesting;
 
 public class NotificationAssistantPreferenceController extends BasePreferenceController {
 
+    @VisibleForTesting
+    protected NotificationBackend mNotificationBackend;
+    private PackageManager mPackageManager;
+
     public NotificationAssistantPreferenceController(Context context, String preferenceKey) {
         super(context, preferenceKey);
+        mNotificationBackend = new NotificationBackend();
+        mPackageManager = mContext.getPackageManager();
     }
 
     @Override
     public int getAvailabilityStatus() {
         return BasePreferenceController.AVAILABLE;
     }
+
+    @Override
+    public CharSequence getSummary() {
+        CandidateInfo appSelected = new NotificationAssistantPicker.CandidateNone(mContext);
+        ComponentName assistant = mNotificationBackend.getAllowedNotificationAssistant();
+        if (assistant != null) {
+            appSelected = createCandidateInfo(assistant);
+        }
+        return appSelected.loadLabel();
+    }
+
+    @VisibleForTesting
+    protected CandidateInfo createCandidateInfo(ComponentName cn) {
+        return new DefaultAppInfo(mContext, mPackageManager, UserHandle.myUserId(), cn);
+    }
 }

tests/robotests/src/com/android/settings/notification/NotificationAssistantPreferenceControllerTest.java

@@ -0,0 +1,100 @@
+/*
+ * 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.notification;
+
+import static junit.framework.TestCase.assertEquals;
+
+import static org.mockito.Mockito.when;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.graphics.drawable.Drawable;
+import android.os.Debug;
+
+import com.android.settingslib.widget.CandidateInfo;
+
+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.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class NotificationAssistantPreferenceControllerTest {
+
+    private static final String KEY = "TEST_KEY";
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private NotificationBackend mBackend;
+    private NotificationAssistantPreferenceController mPreferenceController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mPreferenceController = new TestPreferenceController(mContext, mBackend);
+    }
+
+    @Test
+    public void testGetSummary_noAssistant() {
+        when(mBackend.getAllowedNotificationAssistant()).thenReturn(null);
+        CharSequence noneLabel = new NotificationAssistantPicker.CandidateNone(mContext)
+                .loadLabel();
+        assertEquals(noneLabel, mPreferenceController.getSummary());
+    }
+
+    @Test
+    public void testGetSummary_TestAssistant() {
+        String testName = "test_pkg/test_cls";
+        when(mBackend.getAllowedNotificationAssistant()).thenReturn(
+                ComponentName.unflattenFromString(testName));
+        assertEquals(testName, mPreferenceController.getSummary());
+    }
+
+    private final class TestPreferenceController extends NotificationAssistantPreferenceController {
+
+        private TestPreferenceController(Context context, NotificationBackend backend) {
+            super(context, KEY);
+            mNotificationBackend = backend;
+        }
+
+        @Override
+        public String getPreferenceKey() {
+            return KEY;
+        }
+
+        @Override
+        protected CandidateInfo createCandidateInfo(ComponentName cn) {
+            return new CandidateInfo(true) {
+                @Override
+                public CharSequence loadLabel() { return cn.flattenToString(); }
+
+                @Override
+                public Drawable loadIcon() { return null; }
+
+                @Override
+                public String getKey() { return null; }
+            };
+        }
+    }
+
+}