func testHostHandlers(t *testing.T, mode testMode) {
	mux := NewServeMux()
	for _, h := range handlers {
		mux.Handle(h.pattern, stringHandler(h.msg))
	}
	ts := newClientServerTest(t, mode, mux).ts

	conn, err := net.Dial("tcp", ts.Listener.Addr().String())
	if err != nil {
		t.Fatal(err)
	}
	defer conn.Close()
	cc := httputil.NewClientConn(conn, nil)

					go io.Copy(targetConn, clientConn)
					go func() {
						io.Copy(clientConn, targetConn)
						targetConn.Close()
					}()
				}
			})
			ts := newClientServerTest(t, siteMode, h1).ts
			proxy := newClientServerTest(t, proxyMode, h2).ts

			pu, err := url.Parse(proxy.URL)
			if err != nil {
				t.Fatal(err)
			}