t.Error(err)
		}
	})
	return filepath.Join(d, "sock")
}

func newLocalListener(t testing.TB, network string, lcOpt ...*ListenConfig) Listener {
	var lc *ListenConfig
	switch len(lcOpt) {
	case 0:
		lc = new(ListenConfig)
	case 1:
		lc = lcOpt[0]
	default:
		t.Helper()
		t.Fatal("too many ListenConfigs passed to newLocalListener: want 0 or 1")
	}