[Media Router] Use DialMediaSinkService in MediaRouterMojoImpl

chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy_unittest.cc

+// 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.
+
+#include "chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h"
+#include "base/run_loop.h"
+#include "base/test/mock_callback.h"
+#include "chrome/browser/media/router/discovery/dial/dial_media_sink_service_impl.h"
+#include "chrome/browser/media/router/test_helper.h"
+#include "chrome/test/base/testing_profile.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::_;
+using ::testing::InvokeWithoutArgs;
+using ::testing::Return;
+
+namespace media_router {
+
+class MockDialMediaSinkServiceImpl : public DialMediaSinkServiceImpl {
+ public:
+  MockDialMediaSinkServiceImpl(
+      const MediaSinkService::OnSinksDiscoveredCallback&
+          sink_discovery_callback,
+      net::URLRequestContextGetter* request_context)
+      : DialMediaSinkServiceImpl(sink_discovery_callback, request_context) {}
+  ~MockDialMediaSinkServiceImpl() override {}
+
+  MOCK_METHOD0(Start, void());
+  MOCK_METHOD0(Stop, void());
+
+  void OnSinksDiscovered() {
+    sink_discovery_callback_.Run(std::vector<MediaSinkInternal>());
+  }
+};
+
+class DialMediaSinkServiceProxyTest : public ::testing::Test {
+ public:
+  DialMediaSinkServiceProxyTest()
+      : proxy_(new DialMediaSinkServiceProxy(mock_sink_discovered_cb_.Get(),
+                                             &profile_)) {
+    std::unique_ptr<MockDialMediaSinkServiceImpl> mock_dial_media_sink_service =
+        base::MakeUnique<MockDialMediaSinkServiceImpl>(
+            base::Bind(&DialMediaSinkServiceProxy::OnSinksDiscoveredOnIOThread,
+                       base::Unretained(proxy_.get())),
+            profile_.GetRequestContext());
+    mock_service_ = mock_dial_media_sink_service.get();
+    proxy_->SetDialMediaSinkServiceForTest(
+        std::move(mock_dial_media_sink_service));
+  }
+
+  void TearDown() override { base::RunLoop().RunUntilIdle(); }
+
+ protected:
+  const content::TestBrowserThreadBundle thread_bundle_;

[Kevin M, 2017/05/24 00:52:55]

nit: Why is this const?

[zhaobin, 2017/05/24 17:45:52]

Done.

+  TestingProfile profile_;
+
+  base::MockCallback<MediaSinkService::OnSinksDiscoveredCallback>
+      mock_sink_discovered_cb_;
+
+  MockDialMediaSinkServiceImpl* mock_service_;
+  scoped_refptr<DialMediaSinkServiceProxy> proxy_;
+
+  DISALLOW_COPY_AND_ASSIGN(DialMediaSinkServiceProxyTest);
+};
+
+TEST_F(DialMediaSinkServiceProxyTest, TestStart) {
+  EXPECT_CALL(*mock_service_, Start()).WillOnce(InvokeWithoutArgs([]() {
+    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+  }));
+
+  proxy_->Start();
+}
+
+TEST_F(DialMediaSinkServiceProxyTest, TestStop) {
+  EXPECT_CALL(*mock_service_, Stop()).WillOnce(InvokeWithoutArgs([]() {
+    DCHECK_CURRENTLY_ON(content::BrowserThread::IO);

[Kevin M, 2017/05/24 00:52:55]

Nit: use GTest macros in test cases, they are more compatible with the test
runner's output.

EXPECT_TRUE(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO))
should work.

[zhaobin, 2017/05/24 17:45:51]

Done.

+  }));
+
+  proxy_->Stop();
+}
+
+TEST_F(DialMediaSinkServiceProxyTest, TestOnSinksDiscovered) {
+  EXPECT_CALL(*mock_service_, Start());
+  EXPECT_CALL(mock_sink_discovered_cb_, Run(_)).Times(1);
+
+  proxy_->Start();
+  mock_service_->OnSinksDiscovered();
+}
+
+}  // namespace media_router