message: Rename some test cases for better description
  Reflecting review comments.
diff: @@ -87,7 +87,7 @@ class NaviSetVideoConfigRequestTest
  MockEventDispatcher mock_event_dispatcher_;
  };
  -TEST_F(NaviSetVideoConfigRequestTest, OnEvent_SUCCESS) {
  +TEST_F(NaviSetVideoConfigRequestTest, OnEventWithSuccessResponse) {
  MessageSharedPtr request_msg = CreateMessage();
  (*request_msg)[am::strings::msg_params][am::strings::app_id] = kAppId;
  @@ -117,7 +117,7 @@ static bool ValidateList(std::vector<std::string>& expected,
  return std::equal(expected.begin(), expected.end(), actual.begin());
  }
  -TEST_F(NaviSetVideoConfigRequestTest, OnEvent_FAILURE) {
  +TEST_F(NaviSetVideoConfigRequestTest, OnEventWithRejectedResponse) {
  MessageSharedPtr request_msg = CreateMessage();
  (*request_msg)[am::strings::msg_params][am::strings::app_id] = kAppId;
  (*request_msg)[am::strings::msg_params][am::strings::config] =
  @@ -165,7 +165,8 @@ TEST_F(NaviSetVideoConfigRequestTest, OnEvent_FAILURE) {
  ASSERT_TRUE(ValidateList(expected_list, rejected_params));
  }
  -TEST_F(NaviSetVideoConfigRequestTest, OnEvent_FAILURE_WithoutParams) {
  +TEST_F(NaviSetVideoConfigRequestTest,
  + OnEventWithRejectedResponseWithoutParams) {
  MessageSharedPtr request_msg = CreateMessage();
  (*request_msg)[am::strings::msg_params][am::strings::app_id] = kAppId;
  