Added ConnectionTimeObserver to calculate the times to authenticate and connect.

remoting/test/connection_time_observer_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 "remoting/test/connection_time_observer.h"
+
+#include <utility>
+
+#include "base/time/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+namespace test {
+
+class ConnectionTimeObserverTest : public ::testing::Test {
+ public:
+  ConnectionTimeObserverTest();
+  ~ConnectionTimeObserverTest() override;
+
+  std::map<protocol::ConnectionToHost::State, base::TimeTicks> test_map_;
+
+ protected:
+  // Test interface.
+  void SetUp() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ConnectionTimeObserverTest);
+};
+
+ConnectionTimeObserverTest::ConnectionTimeObserverTest() {
+}
+
+ConnectionTimeObserverTest::~ConnectionTimeObserverTest() {
+}
+
+void ConnectionTimeObserverTest::SetUp() {
+  base::TimeTicks now = base::TimeTicks::Now();
+  test_map_.insert(std::make_pair(
+          protocol::ConnectionToHost::State::INITIALIZING,
+          now + base::TimeDelta::FromMilliseconds(10)));
+  test_map_.insert(std::make_pair(
+          protocol::ConnectionToHost::State::CONNECTING,
+          now + base::TimeDelta::FromMilliseconds(20)));
+  test_map_.insert(std::make_pair(
+          protocol::ConnectionToHost::State::AUTHENTICATED,
+          now + base::TimeDelta::FromMilliseconds(30)));
+  test_map_.insert(std::make_pair(
+          protocol::ConnectionToHost::State::CONNECTED,
+          now + base::TimeDelta::FromMilliseconds(40)));
+  test_map_.insert(std::make_pair(
+          protocol::ConnectionToHost::State::CLOSED,
+          now + base::TimeDelta::FromMilliseconds(50)));
+}
+
+TEST_F(ConnectionTimeObserverTest, ChromotingConnectionSuccess) {
+  ConnectionTimeObserver connection_time_observer;
+
+  connection_time_observer.SetTransitionTimesMapForTest(test_map_);
+
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+      protocol::ConnectionToHost::State::INITIALIZING,
+      protocol::ConnectionToHost::State::CONNECTING).InMilliseconds(), 10);
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+      protocol::ConnectionToHost::State::CONNECTING,
+      protocol::ConnectionToHost::State::AUTHENTICATED).InMilliseconds(), 10);
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+      protocol::ConnectionToHost::State::AUTHENTICATED,
+      protocol::ConnectionToHost::State::CONNECTED).InMilliseconds(), 10);
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+      protocol::ConnectionToHost::State::CONNECTED,
+      protocol::ConnectionToHost::State::CLOSED).InMilliseconds(), 10);
+}
+
+TEST_F(ConnectionTimeObserverTest, StartStateNotFound) {
+  ConnectionTimeObserver connection_time_observer;
+
+  connection_time_observer.SetTransitionTimesMapForTest(test_map_);
+
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+          protocol::ConnectionToHost::State::FAILED,
+          protocol::ConnectionToHost::State::CLOSED),
+      base::TimeDelta::Max());
+}
+
+TEST_F(ConnectionTimeObserverTest, EndStateNotFound) {
+  ConnectionTimeObserver connection_time_observer;
+
+  connection_time_observer.SetTransitionTimesMapForTest(test_map_);
+
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+          protocol::ConnectionToHost::State::INITIALIZING,
+          protocol::ConnectionToHost::State::FAILED),
+      base::TimeDelta::Max());
+}
+
+TEST_F(ConnectionTimeObserverTest, NegativeTranitionDelay) {

[joedow, 2015/07/24 13:38:29]

s/Tranition/Transition

[tonychun, 2015/07/27 16:03:38]

Done.

+  ConnectionTimeObserver connection_time_observer;
+
+  connection_time_observer.SetTransitionTimesMapForTest(test_map_);
+
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+          protocol::ConnectionToHost::State::CLOSED,
+          protocol::ConnectionToHost::State::INITIALIZING),
+      base::TimeDelta::Max());
+}
+
+TEST_F(ConnectionTimeObserverTest, TestOnConnectionStateChanged) {
+  ConnectionTimeObserver connection_time_observer;
+
+  connection_time_observer.SetTransitionTimesMapForTest(test_map_);
+
+  // Should fail to find FAILED.
+  EXPECT_EQ(connection_time_observer.GetStateTransitionDelay(
+          protocol::ConnectionToHost::State::INITIALIZING,
+          protocol::ConnectionToHost::State::FAILED),
+      base::TimeDelta::Max());
+
+  // Registers the time at which FAILED state occurred into the map.
+  connection_time_observer.ConnectionStateChanged(
+      protocol::ConnectionToHost::State::FAILED,
+      protocol::ErrorCode::PEER_IS_OFFLINE);
+
+  EXPECT_GT(connection_time_observer.GetStateTransitionDelay(
+          protocol::ConnectionToHost::State::INITIALIZING,
+          protocol::ConnectionToHost::State::FAILED).InMilliseconds(), 0);

[joedow, 2015/07/24 13:38:29]

You probably want to use the is_zero() method on the return value and use
EXPECT_FALSE here.

[tonychun, 2015/07/27 16:03:38]

Done.

+}

[joedow, 2015/07/24 13:38:29]

You should add a test that sets two states via ConnectionStateChanged and verify
that they are properly added.  Using the test map is good for the others but you
want to cover the map insert code as well.

[tonychun, 2015/07/27 16:03:38]

Done.

+
+}  // namespace test
+}  // namespace remoting