Add media router common classes and unittests.

chrome/browser/media/router/media_controller_impl_unittest.cc

+// Copyright 2014 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 "chrome/browser/media/router/media_controller_impl.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::ContainerEq;
+using testing::Eq;
+using testing::IsEmpty;
+using testing::Eq;
+using testing::Mock;
+
+namespace media_router {
+
+class MockMediaControllerObserver : public MediaController::Observer {
+ public:
+  MockMediaControllerObserver() {}
+  virtual ~MockMediaControllerObserver() {}
+
+  MOCK_METHOD2(OnMediaStatusChange, void(
+      const MediaController* controller, const MediaStatus& current_status));
+  MOCK_METHOD2(OnMediaControlsCapabilitiesChange, void(
+      const MediaController* controller,
+      MediaControlsCapabilities current_capabilities));
+};
+
+class MediaControllerImplTest : public ::testing::Test {
+ protected:
+  MediaControllerImplTest() : controller_("route0") {}
+  ~MediaControllerImplTest() override {}
+
+  MediaControllerImpl controller_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MediaControllerImplTest);
+};
+
+TEST_F(MediaControllerImplTest, NotifyObserversOnMediaStatusChange) {
+  MockMediaControllerObserver observer1, observer2;
+
+  controller_.AddObserver(&observer1);
+  controller_.AddObserver(&observer2);
+
+  MediaStatus status("route1");
+  EXPECT_CALL(observer1,
+      OnMediaStatusChange(Eq(&controller_), Eq(status))).Times(1);
+  EXPECT_CALL(observer2,
+      OnMediaStatusChange(Eq(&controller_), Eq(status))).Times(1);
+  controller_.set_media_status(status);
+  EXPECT_TRUE(Mock::VerifyAndClearExpectations(&observer1));
+  EXPECT_TRUE(Mock::VerifyAndClearExpectations(&observer2));
+
+  controller_.RemoveObserver(&observer2);
+
+  // Only observer1 gets updates since observer2 was removed from controller.
+  MediaStatus status2("route2");
+  EXPECT_CALL(observer1,
+      OnMediaStatusChange(Eq(&controller_), Eq(status2))).Times(1);
+  controller_.set_media_status(status2);
+  EXPECT_TRUE(Mock::VerifyAndClearExpectations(&observer1));
+
+  // No updates since status did not change.
+  controller_.set_media_status(status2);
+
+  controller_.RemoveObserver(&observer1);
+}
+
+TEST_F(MediaControllerImplTest, NotifyObserversOnMediaControlsChange) {
+  MockMediaControllerObserver observer1, observer2;
+
+  controller_.AddObserver(&observer1);
+  controller_.AddObserver(&observer2);
+
+  MediaControlsCapabilities capabilities = MEDIA_COMMAND_PAUSE;
+
+  EXPECT_CALL(observer1, OnMediaControlsCapabilitiesChange(
+      Eq(&controller_), Eq(capabilities)))
+      .Times(1);
+  EXPECT_CALL(observer2, OnMediaControlsCapabilitiesChange(
+      Eq(&controller_), Eq(capabilities)))
+      .Times(1);
+
+  controller_.set_media_controls_capabilities(capabilities);
+
+  EXPECT_TRUE(Mock::VerifyAndClearExpectations(&observer1));
+  EXPECT_TRUE(Mock::VerifyAndClearExpectations(&observer2));
+
+  controller_.RemoveObserver(&observer2);
+
+  // Only observer1 gets updates since observer2 was removed from controller.
+  capabilities = MEDIA_COMMAND_PAUSE | MEDIA_COMMAND_PLAY;
+  EXPECT_CALL(observer1, OnMediaControlsCapabilitiesChange(
+      Eq(&controller_), Eq(capabilities)))
+      .Times(1);
+  controller_.set_media_controls_capabilities(capabilities);
+  EXPECT_TRUE(Mock::VerifyAndClearExpectations(&observer1));
+
+  // No updates since status did not change.
+  controller_.set_media_controls_capabilities(capabilities);
+
+  controller_.RemoveObserver(&observer1);
+}
+
+}  // namespace media_router