Add unit tests for the Background Scheduler.

chrome/android/junit/src/org/chromium/chrome/browser/offlinepages/BackgroundOfflinerTaskTest.java

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.offlinepages;
+
+import static org.junit.Assert.assertTrue;
+
+import android.os.Bundle;
+
+import org.chromium.base.BaseChromiumApplication;
+import org.chromium.base.test.util.Feature;
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+
+/**
+ * Unit tests for BackgroundOfflinerTask.
+ */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE,
+        application = BaseChromiumApplication.class)
+public class BackgroundOfflinerTaskTest {
+    private Bundle mTaskExtras;
+    private long mTestTime;
+    private StubSchedulerRequestProcessor mStubSchedulerRequestProcessor;
+
+    @Before
+    public void setUp() throws Exception {
+        // Build a bundle
+        mTaskExtras = new Bundle();
+        TaskExtrasPacker.packTimeInBundle(mTaskExtras);
+        mStubSchedulerRequestProcessor = new StubSchedulerRequestProcessor();
+    }
+
+    @Test
+    @Feature({"OfflinePages"})
+    public void testIncomingTask() {
+        BackgroundOfflinerTask task =
+                new BackgroundOfflinerTask(mStubSchedulerRequestProcessor);
+        task.processBackgroundRequests(mTaskExtras);
+        // Call onProcessingDone here to make sure the code path is covered by a test.
+        // This will likely move to its own test later as we add more implementation.
+        task.onProcessingDone(true);
+
+        // Check with ShadowBackgroundSchedulerRequestProcessor that startProcessing got called.
+        assertTrue(mStubSchedulerRequestProcessor.getStartProcessingCalled());
+    }
+
+    @Test
+    @Feature({"OfflinePages"})
+    public void testOnProcessingDone() {
+        // TODO(petewil): Implement the test
+    }
+}