Adding the base ChromotingInstance implementation and unittests. This class will be used by the ap…

remoting/test/test_chromoting_client_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 <string>
+
+#include "base/message_loop/message_loop.h"
+#include "remoting/protocol/fake_connection_to_host.h"
+#include "remoting/test/test_chromoting_client.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+const char kTestUserName[] = "test_user@faux_address.com";
+const char kAccessToken[] = "faux_access_token";
+}
+
+namespace remoting {
+namespace test {
+
+using testing::_;
+
+// Provides base functionality for the TestChromotingClient Tests below.  This
+// fixture also creates an IO MessageLoop for use by the TestChromotingClient.
+// Overrides a subset of the RemoteConnectionObserver interface to track
+// connection status changes for result verification.
+class TestChromotingClientTest : public ::testing::Test,

[Sergey Ulanov, 2015/03/11 00:09:52]

I'm not sure how useful it is to unittest test code. IMO this test may create
more maintenance work without much return. Do we really need it?

[joedow, 2015/03/11 19:06:39]

Acknowledged.

+                                 public RemoteConnectionObserver {
+ public:
+  TestChromotingClientTest();
+  ~TestChromotingClientTest() override;
+
+ protected:
+  // testing::Test interface.
+  void SetUp() override;
+  void TearDown() override;
+
+  // Used for result verification.
+  bool is_connected_to_host_;
+  protocol::ConnectionToHost::State connection_state_;
+  protocol::ErrorCode error_code_;
+
+  // Used for simulating different conditions for the TestChromotingClient.
+  RemoteHostInfo remote_host_info_;
+  FakeConnectionToHost* fake_connection_to_host_;
+
+  scoped_ptr<TestChromotingClient> test_chromoting_client_;
+
+ private:
+  // RemoteConnectionObserver interface.
+  void ConnectionStateChanged(protocol::ConnectionToHost::State state,
+                              protocol::ErrorCode error_code) override;
+  void ConnectionReady(bool ready) override;
+
+  base::MessageLoopForIO message_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestChromotingClientTest);
+};
+
+TestChromotingClientTest::TestChromotingClientTest()
+    : is_connected_to_host_(false),
+      connection_state_(protocol::ConnectionToHost::INITIALIZING),
+      error_code_(protocol::OK),
+      fake_connection_to_host_(nullptr) {
+}
+
+TestChromotingClientTest::~TestChromotingClientTest() {
+}
+
+void TestChromotingClientTest::SetUp() {
+  test_chromoting_client_.reset(new TestChromotingClient());
+  test_chromoting_client_->AddRemoteConnectionObserver(this);
+
+  // Pass ownership of the FakeConnectionToHost to the chromoting instance but
+  // keep the ptr around so we can use it to simulate state changes.  It will
+  // remain valid until |test_chromoting_client_| is destroyed.
+  fake_connection_to_host_ = new FakeConnectionToHost();
+  test_chromoting_client_->SetConnectionToHostForTests(
+      make_scoped_ptr(fake_connection_to_host_));
+
+  remote_host_info_.remote_host_status = kRemoteHostStatusReady;
+}
+
+void TestChromotingClientTest::TearDown() {
+  test_chromoting_client_->RemoveRemoteConnectionObserver(this);
+  fake_connection_to_host_ = nullptr;
+
+  // The chromoting instance must be destroyed before the message loop.
+  test_chromoting_client_.reset();
+
+  // The LibjingleTransportFactory destroys the PortAllocator via a DeleteSoon
+  // operation.  If we do not allow the message loop to run here, we run the
+  // risk of the DeleteSoon task being dropped and incurring a memory leak.
+  message_loop_.RunUntilIdle();
+}
+
+void TestChromotingClientTest::ConnectionStateChanged(
+    protocol::ConnectionToHost::State state,
+    protocol::ErrorCode error_code) {
+  connection_state_ = state;
+  error_code_ = error_code;
+
+  if (state != protocol::ConnectionToHost::State::CONNECTED ||
+      error_code != protocol::ErrorCode::OK) {
+    is_connected_to_host_ = false;
+  }
+}
+
+void TestChromotingClientTest::ConnectionReady(bool ready) {
+  if (ready) {
+    is_connected_to_host_ = true;
+  }
+}
+
+TEST_F(TestChromotingClientTest, StartConnectionAndDisconnect) {
+  test_chromoting_client_->StartConnection(kTestUserName, kAccessToken,
+                                           remote_host_info_);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTING, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // Simulate an AUTHENTICATED message being sent from the Jingle session.
+  fake_connection_to_host_->OnSessionStateChange(
+      protocol::Session::AUTHENTICATED);
+  EXPECT_EQ(protocol::ConnectionToHost::State::AUTHENTICATED,
+            connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // Simulate a CONNECTED message being sent from the Jingle session.
+  fake_connection_to_host_->OnSessionStateChange(protocol::Session::CONNECTED);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // TestChromotingClient will consider its connection to the host
+  // complete once the video channel is active.
+  fake_connection_to_host_->OnVideoChannelStatus(true);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_TRUE(is_connected_to_host_);
+
+  test_chromoting_client_->EndConnection();
+  EXPECT_EQ(protocol::ConnectionToHost::State::CLOSED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+}
+
+TEST_F(TestChromotingClientTest,
+       StartConnectionThenFailWithAuthenticationError) {
+  test_chromoting_client_->StartConnection(kTestUserName, kAccessToken,
+                                           remote_host_info_);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTING, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  fake_connection_to_host_->set_session_state_change_error_code(
+      protocol::AUTHENTICATION_FAILED);
+  fake_connection_to_host_->OnSessionStateChange(protocol::Session::FAILED);
+  EXPECT_EQ(protocol::ConnectionToHost::State::FAILED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::AUTHENTICATION_FAILED, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // Close the connection via the TestChromotingClient and verify the error
+  // state is persisted.
+  test_chromoting_client_->EndConnection();
+  EXPECT_EQ(protocol::ConnectionToHost::State::FAILED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::AUTHENTICATION_FAILED, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+}
+
+TEST_F(TestChromotingClientTest, StartConnectionThenFailWithUnknownError) {
+  test_chromoting_client_->StartConnection(kTestUserName, kAccessToken,
+                                           remote_host_info_);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTING, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // Simulate an AUTHENTICATED message being sent from the Jingle session.
+  fake_connection_to_host_->OnSessionStateChange(
+      protocol::Session::AUTHENTICATED);
+  EXPECT_EQ(protocol::ConnectionToHost::State::AUTHENTICATED,
+            connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // Simulate a CONNECTED message being sent from the Jingle session.
+  fake_connection_to_host_->OnSessionStateChange(protocol::Session::CONNECTED);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // TestChromotingClient will consider its connection to the host complete
+  // once the video channel is active.
+  fake_connection_to_host_->OnVideoChannelStatus(true);
+  EXPECT_EQ(protocol::ConnectionToHost::State::CONNECTED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::OK, error_code_);
+  EXPECT_TRUE(is_connected_to_host_);
+
+  fake_connection_to_host_->set_session_state_change_error_code(
+      protocol::UNKNOWN_ERROR);
+  fake_connection_to_host_->OnSessionStateChange(protocol::Session::FAILED);
+  EXPECT_EQ(protocol::ConnectionToHost::State::FAILED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::UNKNOWN_ERROR, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+
+  // Close the connection via the TestChromotingClient and verify the error
+  // state is persisted.
+  test_chromoting_client_->EndConnection();
+  EXPECT_EQ(protocol::ConnectionToHost::State::FAILED, connection_state_);
+  EXPECT_EQ(protocol::ErrorCode::UNKNOWN_ERROR, error_code_);
+  EXPECT_FALSE(is_connected_to_host_);
+}
+
+}  // namespace test
+}  // namespace remoting