}
func testHijackBeforeRequestBodyRead(t *testing.T, mode testMode) {
	var requestBody = bytes.Repeat([]byte("a"), 1<<20)
	bodyOkay := make(chan bool, 1)
	gotCloseNotify := make(chan bool, 1)
	ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		defer close(bodyOkay) // caller will read false if nothing else

		reqBody := r.Body
		r.Body = nil // to test that server.go doesn't use this value.