40     std::string error;  in TEST()  local
41     EXPECT_NE(nullptr, tcp::internal::Connect(std::move(mock), &error));  in TEST()
42     EXPECT_EQ("", error);  in TEST()
50     std::string error;  in TEST()  local
51     EXPECT_NE(nullptr, tcp::internal::Connect(std::move(mock), &error));  in TEST()
52     EXPECT_EQ("", error);  in TEST()
59     std::string error;  in TEST()  local
60     EXPECT_EQ(nullptr, tcp::internal::Connect(std::move(mock), &error));  in TEST()
61     EXPECT_NE(std::string::npos, error.find("Failed to send initialization message"));  in TEST()
69     std::string error;  in TEST()  local
70     EXPECT_EQ(nullptr, tcp::internal::Connect(std::move(mock), &error));  in TEST()
71     EXPECT_NE(std::string::npos, error.find("No initialization message received"));  in TEST()
79     std::string error;  in TEST()  local
80     EXPECT_EQ(nullptr, tcp::internal::Connect(std::move(mock), &error));  in TEST()
81     EXPECT_NE(std::string::npos, error.find("Unrecognized initialization message"));  in TEST()
89     std::string error;  in TEST()  local
90     EXPECT_EQ(nullptr, tcp::internal::Connect(std::move(mock), &error));  in TEST()
91     EXPECT_EQ("Unknown TCP protocol version 00 (host version 01)", error);  in TEST()
102         std::string error;  in SetUp()  local
103         transport_ = tcp::internal::Connect(std::unique_ptr<Socket>(mock_), &error);  in SetUp()
105         ASSERT_EQ("", error);  in SetUp()