public void Keses_JohozAdjaHozza()
        {
            JaratKezelo jk = new JaratKezelo();

            jk.UjJarat("S213", "Budapest", "Berlin", new DateTime(2019, 03, 01, 12, 50, 0));
            jk.Keses("S213", 5);

            Assert.AreEqual(
                5,
                jk.Jaratkesese("S213")
                );
        }
        public void Keses_NemLetezoJarat()
        {
            JaratKezelo jk = new JaratKezelo();

            jk.UjJarat("S213", "Budapest", "Berlin", new DateTime(2019, 03, 01, 12, 50, 0));

            Assert.Throws <ArgumentException>(
                () =>
            {
                jk.Keses("A123", 5);
            }
                );
        }