NOT FOR LANDING Introduce and use WebMediaSession

Source/modules/mediasession/MediaSessionTest.cpp

+// Copyright 2015 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.
+
+#include "config.h"
+#include "modules/mediasession/MediaSession.h"
+
+#include "public/platform/WebMediaSession.h"
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace blink {
+namespace {
+
+class MockWebMediaSession : public WebMediaSession {
+public:
+    MOCK_METHOD0(activate, void());
+    MOCK_METHOD0(deactivate, void());
+};
+
+class MediaSessionTest : public ::testing::Test {
+protected:
+    MediaSession* createMediaSession(WebMediaSession* webMediaSession)
+    {
+        // The MediaSession takes ownership of the WebMediaSession, and the
+        // caller must take care to not end up with a stale pointer.
+        return MediaSession::createForTesting(adoptPtr(webMediaSession));
+    }
+};
+
+TEST_F(MediaSessionTest, Activate)
+{
+    MockWebMediaSession* mockWebMediaSession = new MockWebMediaSession;
+    MediaSession* mediaSession = createMediaSession(mockWebMediaSession);
+    EXPECT_CALL(*mockWebMediaSession, activate());
+    mediaSession->activate();
+}
+
+TEST_F(MediaSessionTest, Deactivate)
+{
+    MockWebMediaSession* mockWebMediaSession = new MockWebMediaSession;
+    MediaSession* mediaSession = createMediaSession(mockWebMediaSession);
+    EXPECT_CALL(*mockWebMediaSession, deactivate());
+    mediaSession->deactivate();
+}
+
+} // namespace
+} // namespace blink