1 files changed, 99 insertions, 0 deletions
diff --git a/quickstep/tests/src/com/android/quickstep/RecentTasksListTest.java b/quickstep/tests/src/com/android/quickstep/RecentTasksListTest.java
new file mode 100644
index 000000000..34eb7f817
--- /dev/null
+++ b/quickstep/tests/src/com/android/quickstep/RecentTasksListTest.java
@@ -0,0 +1,99 @@
+/*
+ * 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.quickstep;
+
+import static junit.framework.TestCase.assertNull;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.ActivityManager;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.launcher3.util.LooperExecutor;
+import com.android.systemui.shared.recents.model.Task;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
+import com.android.systemui.shared.system.KeyguardManagerCompat;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Collections;
+import java.util.List;
+
+@SmallTest
+public class RecentTasksListTest {
+
+    private ActivityManagerWrapper mockActivityManagerWrapper;
+
+    // Class under test
+    private RecentTasksList mRecentTasksList;
+
+    @Before
+    public void setup() {
+        LooperExecutor mockMainThreadExecutor = mock(LooperExecutor.class);
+        KeyguardManagerCompat mockKeyguardManagerCompat = mock(KeyguardManagerCompat.class);
+        mockActivityManagerWrapper = mock(ActivityManagerWrapper.class);
+        mRecentTasksList = new RecentTasksList(mockMainThreadExecutor, mockKeyguardManagerCompat,
+                mockActivityManagerWrapper);
+    }
+
+    @Test
+    public void onTaskRemoved_reloadsAllTasks() {
+        mRecentTasksList.onTaskRemoved(0);
+        verify(mockActivityManagerWrapper, times(1))
+                .getRecentTasks(anyInt(), anyInt());
+    }
+
+    @Test
+    public void onTaskStackChanged_doesNotFetchTasks() {
+        mRecentTasksList.onTaskStackChanged();
+        verify(mockActivityManagerWrapper, times(0))
+                .getRecentTasks(anyInt(), anyInt());
+    }
+
+    @Test
+    public void loadTasksInBackground_onlyKeys_noValidTaskDescription() {
+        ActivityManager.RecentTaskInfo recentTaskInfo = new ActivityManager.RecentTaskInfo();
+        when(mockActivityManagerWrapper.getRecentTasks(anyInt(), anyInt()))
+                .thenReturn(Collections.singletonList(recentTaskInfo));
+
+        List<Task> taskList = mRecentTasksList.loadTasksInBackground(Integer.MAX_VALUE, true);
+
+        assertEquals(1, taskList.size());
+        assertNull(taskList.get(0).taskDescription.getLabel());
+    }
+
+    @Test
+    public void loadTasksInBackground_moreThanKeys_hasValidTaskDescription() {
+        String taskDescription = "Wheeee!";
+        ActivityManager.RecentTaskInfo recentTaskInfo = new ActivityManager.RecentTaskInfo();
+        recentTaskInfo.taskDescription = new ActivityManager.TaskDescription(taskDescription);
+        when(mockActivityManagerWrapper.getRecentTasks(anyInt(), anyInt()))
+                .thenReturn(Collections.singletonList(recentTaskInfo));
+
+        List<Task> taskList = mRecentTasksList.loadTasksInBackground(Integer.MAX_VALUE, false);
+
+        assertEquals(1, taskList.size());
+        assertEquals(taskDescription, taskList.get(0).taskDescription.getLabel());
+    }
+}