[Media>UI] Migrate media notification tests to JUnit tests

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

Index: chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestTabHolder.java
diff --git a/chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestTabHolder.java b/chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestTabHolder.java
new file mode 100644
index 0000000000000000000000000000000000000000..ddf16f9db5540f709878818eb182eb2d81c0edac
--- /dev/null
+++ b/chrome/android/junit/src/org/chromium/chrome/browser/media/ui/MediaNotificationTestTabHolder.java
@@ -0,0 +1,88 @@
+// 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.when;
+
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.content_public.browser.MediaSession;
+import org.chromium.content_public.browser.WebContents;
+import org.chromium.content_public.common.MediaMetadata;
+
+import java.util.Set;
+
+/**
+ * Utility class for holding a Tab and relevant objects for media notification tests.
+ */
+public class MediaNotificationTestTabHolder {
+    @Mock
+    WebContents mWebContents;
+    @Mock
+    MediaSession mMediaSession;
+    @Mock
+    Tab mTab;
+
+    String mTitle;
+    String mUrl;
+
+    MediaSessionTabHelper mMediaSessionTabHelper;
+
+    public MediaNotificationTestTabHolder(int tabId, String url, String title) {
+        MockitoAnnotations.initMocks(this);
+
+        when(mTab.getWebContents()).thenReturn(mWebContents);
+        when(mTab.getId()).thenReturn(tabId);
+        when(mTab.isIncognito()).thenReturn(false);
+        when(mTab.getTitle()).thenAnswer(new Answer<String>() {
+            @Override
+            public String answer(InvocationOnMock invocation) {
+                return mTitle;
+            }
+        });
+        when(mTab.getUrl()).thenAnswer(new Answer<String>() {
+            @Override
+            public String answer(InvocationOnMock invocation) {
+                return mUrl;
+            }
+        });
+
+        MediaSessionTabHelper.sOverriddenMediaSession = mMediaSession;
+        mMediaSessionTabHelper = new MediaSessionTabHelper(mTab);
+
+        simulateNavigation(url, false);
+        simulateTitleUpdated(title);
+    }
+
+    public void simulateTitleUpdated(String title) {
+        mTitle = title;
+        mMediaSessionTabHelper.mTabObserver.onTitleUpdated(mTab);
+    }
+
+    public void simulateMediaSessionStateChanged(boolean isControllable, boolean isSuspended) {
+        mMediaSessionTabHelper.mMediaSessionObserver.mediaSessionStateChanged(
+                isControllable, isSuspended);
+    }
+
+    public void simulateMediaSessionMetadataChanged(MediaMetadata metadata) {
+        mMediaSessionTabHelper.mMediaSessionObserver.mediaSessionMetadataChanged(metadata);
+    }
+
+    public void simulateMediaSessionActionsChanged(Set<Integer> actions) {
+        mMediaSessionTabHelper.mMediaSessionObserver.mediaSessionActionsChanged(actions);
+    }
+
+    public void simulateNavigation(String url, boolean isSameDocument) {
+        mUrl = url;
+        mMediaSessionTabHelper.mTabObserver.onDidFinishNavigation(mTab, url,
+                true /* isInMainFrame */, false /* isErrorPage */, true /* hasCommitted */,
+                isSameDocument, false /* isFragmentNavigation */, 0 /* pageTransition */,
+                0 /* errorCode */, 200 /* httpStatusCode */);
+    }
+}