public void NemLetezoUticel()
        {
            jk.UjJarat("176", "Germany", "United Kingdom", DateTime.Parse("09:18"));
            jk.UjJarat("276", "Germany", "United Kingdom", DateTime.Parse("09:18"));

            Assert.Throws <ArgumentException>(
                () => {
                var jarat = jk.getJaratSzam("176");
            }
                );
        }