var unixEnabledOnAIX … func init() { … } // testableNetwork reports whether network is testable on the current // platform configuration. func testableNetwork(network string) bool { … } // testableAddress reports whether address of network is testable on // the current platform configuration. func testableAddress(network, address string) bool { … } // testableListenArgs reports whether arguments are testable on the // current platform configuration. func testableListenArgs(network, address, client string) bool { … } func condFatalf(t *testing.T, network string, format string, args ...any) { … }