t.Errorf("Write error = %v; want errConnClosed", err)
	}

	<-closeReturned
	if err := tconn.Close(); err != net.ErrClosed {
		t.Errorf("Close error = %v; want net.ErrClosed", err)
	}
}

func TestConnCloseWrite(t *testing.T) {
	ln := newLocalListener(t)
	defer ln.Close()

	clientDoneChan := make(chan struct{})

	serverCloseWrite := func() error {
		sconn, err := ln.Accept()
		if err != nil {