Adding JUnit tests for MediaNotificationManager

chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestShadowResources.java

Index: chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestShadowResources.java
diff --git a/chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestShadowResources.java b/chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestShadowResources.java
new file mode 100644
index 0000000000000000000000000000000000000000..7febe4442deccbd874b2dae92289c0d07ed762ed
--- /dev/null
+++ b/chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestShadowResources.java
@@ -0,0 +1,39 @@
+// Copyright 2017 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.media.ui;
+
+import static org.mockito.Mockito.anyInt;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+
+import android.content.res.Resources;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.shadows.ShadowResources;
+
+/**
+ * Dummy Robolectric shadow for Android Resources for MediaNotification tests.
+ */
+@Implements(Resources.class)
+public class MediaNotificationTestShadowResources extends ShadowResources {
+    public static final Resources sResources;
+
+    static {
+        sResources = mock(Resources.class);
+        doReturn("mocked text").when(sResources).getText(anyInt());
+        doReturn("mocked resource name").when(sResources).getResourceName(anyInt());
+    }
+
+    @Implementation
+    public CharSequence getText(int id) {
+        return sResources.getText(id);
+    }
+
+    @Implementation
+    public CharSequence getResourceName(int id) {
+        return sResources.getResourceName(id);
+    }
+}