// [ErrHandlerTimeout].
//
// TimeoutHandler supports the [Pusher] interface but does not support
// the [Hijacker] or [Flusher] interfaces.
func TimeoutHandler(h Handler, dt time.Duration, msg string) Handler {
	return &timeoutHandler{
		handler: h,
		body:    msg,
		dt:      dt,
	}
}

// ErrHandlerTimeout is returned on [ResponseWriter] Write calls

		t.Errorf("response content-type = %q; want %q", g, w)
	}

	// Now make the previously-timed out handler speak again,
	// which verifies the panic is handled:
	sendHi <- true
	if g, e := <-writeErrors, ErrHandlerTimeout; g != e {
		t.Errorf("expected Write error of %v; got %v", e, g)
	}
}

// See issues 8209 and 8414.
func TestTimeoutHandlerRace(t *testing.T) { run(t, testTimeoutHandlerRace) }