[Media Router Tests] Add tests for MediaRouterFactory.

chrome/browser/media/router/media_router_factory_unittest.cc

+// 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.
+
+#include "chrome/browser/media/router/media_router_factory.h"
+
+#include "chrome/browser/media/router/mock_media_router.h"
+#include "chrome/test/base/testing_profile.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media_router {
+
+namespace {
+
+scoped_ptr<KeyedService> CreateMockMediaRouter(

[dcheng, 2016/04/26 08:26:12]

Please use std::unique_ptr and base::WrapUnique. scoped_ptr is being removed
very shortly (probably tomorrow)

+    content::BrowserContext* context) {
+  return make_scoped_ptr(new MockMediaRouter);
+}
+
+}  // namespace
+
+class MediaRouterFactoryTest : public testing::Test {
+ protected:
+  MediaRouterFactoryTest() {}
+  ~MediaRouterFactoryTest() override {}
+
+  Profile* profile() { return &profile_; }
+
+ private:
+  content::TestBrowserThreadBundle thread_bundle_;
+  TestingProfile profile_;
+};
+
+TEST_F(MediaRouterFactoryTest, CreateForRegularProfile) {
+  ASSERT_TRUE(MediaRouterFactory::GetApiForBrowserContext(profile()));
+}
+
+TEST_F(MediaRouterFactoryTest, CreateForOffTheRecordProfile) {
+  Profile* otr_profile = profile()->GetOffTheRecordProfile();
+  ASSERT_TRUE(otr_profile);
+
+  // Makes sure a MediaRouter can be created from an OTR Profile.
+  MediaRouter* router =
+      MediaRouterFactory::GetApiForBrowserContext(otr_profile);
+  ASSERT_TRUE(router);
+
+  // A Profile and its OTR Profile share the same MediaRouter instance.
+  ASSERT_EQ(router, MediaRouterFactory::GetApiForBrowserContext(profile()));
+}
+
+TEST_F(MediaRouterFactoryTest, OffTheRecordBrowserContextShutdown) {
+  MediaRouterFactory::GetMediaRouterFactoryForTest()->SetTestingFactory(
+      profile(), &CreateMockMediaRouter);
+
+  // Creates an off the record profile.
+  profile()->GetOffTheRecordProfile();
+  MockMediaRouter* router = static_cast<MockMediaRouter*>(
+      MediaRouterFactory::GetApiForBrowserContext(profile()));
+  ASSERT_TRUE(router);
+  EXPECT_CALL(*router, OnOffTheRecordProfileShutdown());
+  profile()->DestroyOffTheRecordProfile();
+}
+
+}  // namespace media_router