if err != nil {
		t.Fatal(err)
	}

	if err != context.DeadlineExceeded {
		t.Error("DeadlineWriter shouldn't be successful - should return context.DeadlineExceeded")
	}
	w.Close()
	w = NewDeadlineWriter(&sleepWriter{timeout: 100 * time.Millisecond}, 600*time.Millisecond)
	n, err := w.Write([]byte("abcd"))
	w.Close()
	if err != nil {
		t.Errorf("DeadlineWriter should succeed but failed with %s", err)
	}
	if n != 4 {