if err == nil {
		t.Fatal("expected error, got none.")
	}
}

func TestDialer(t *testing.T) {
	timeout := 500 * time.Millisecond
	testAddr := newTCPServer(t, "hello")
	proxy := newHBONEServer(t)
	d := NewDialer(Config{
		ProxyAddress: proxy,
		Headers: map[string][]string{
			"some-addition-metadata": {"test-value"},
		},
		TLS:     nil, // No TLS for simplification
		Timeout: &timeout,
	})