}
	if got, want := bs.Text(), "ECHO"; got != want {
		t.Errorf("read %q; want %q", got, want)
	}
}

func TestTransportCONNECTBidi(t *testing.T) { run(t, testTransportCONNECTBidi, []testMode{http1Mode}) }
func testTransportCONNECTBidi(t *testing.T, mode testMode) {
	const target = "backend:443"
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {