[Media Router] Implement JoinRoute + update CreateRoute API.

chrome/browser/media/router/create_session_request_unittest.cc

+// 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 "base/bind.h"
+#include "chrome/browser/media/router/create_session_request.h"
+#include "chrome/browser/media/router/media_source_helper.h"
+#include "content/public/browser/presentation_service_delegate.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media_router {
+
+namespace {
+
+const char kPresentationUrl[] = "http://fooUrl";
+const char kPresentationId[] = "presentationId";
+
+}  // namespace
+
+class CreateSessionRequestTest : public ::testing::Test {
+ public:
+  CreateSessionRequestTest() : success_cb_invoked_(false) {}
+  ~CreateSessionRequestTest() override {}
+
+  void OnSuccess(const content::PresentationSessionInfo& expected_info,
+                 const content::PresentationSessionInfo& actual_info) {
+    success_cb_invoked_ = true;
+    EXPECT_EQ(expected_info.presentation_url, actual_info.presentation_url);
+    EXPECT_EQ(expected_info.presentation_id, actual_info.presentation_id);
+  }
+
+  void FailOnError(const content::PresentationError& error) {
+    FAIL() << "Should not have been called.";
+  }
+
+  bool success_cb_invoked_;
+};
+
+// Test that the object's getters match the constructor parameters.
+TEST_F(CreateSessionRequestTest, Getters) {
+  GURL frame_url("http://frameUrl");
+
+  content::PresentationSessionInfo session_info(kPresentationUrl,
+                                                kPresentationId);
+
+  CreateSessionRequest context(
+      kPresentationUrl, kPresentationId, frame_url,
+      CreateSessionRequest::PresentationSessionSuccessCallback(),
+      CreateSessionRequest::PresentationSessionErrorCallback());
+  EXPECT_TRUE(MediaSourceForPresentationUrl(kPresentationUrl)
+                  .Equals(context.GetMediaSource()));
+  EXPECT_EQ(frame_url, context.frame_url());
+  content::PresentationSessionInfo actual_session_info(
+      context.presentation_info());
+  EXPECT_EQ(kPresentationUrl, actual_session_info.presentation_url);
+  EXPECT_EQ(kPresentationId, actual_session_info.presentation_id);
+}
+
+TEST_F(CreateSessionRequestTest, Callbacks) {

[mark a. foltz, 2015/06/10 23:18:51]

Would like to see test cases that exercise both the success and error callbacks.

[imcheng (use chromium acct), 2015/06/11 22:49:12]

Done. Added a test case where error callback is invoked.

+  GURL frame_url("http://frameUrl");
+  content::PresentationSessionInfo session_info(kPresentationUrl,
+                                                kPresentationId);
+  CreateSessionRequest context(
+      kPresentationUrl, kPresentationId, frame_url,
+      base::Bind(&CreateSessionRequestTest::OnSuccess, base::Unretained(this),
+                 session_info),
+      base::Bind(&CreateSessionRequestTest::FailOnError,
+                 base::Unretained(this)));
+  context.MaybeInvokeSuccessCallback();
+  // No-op since success callback is already invoked.
+  context.MaybeInvokeErrorCallback(content::PresentationError(
+      content::PRESENTATION_ERROR_NO_AVAILABLE_SCREENS, "Error message"));
+  EXPECT_TRUE(success_cb_invoked_);
+}
+
+}  // namespace media_router