public void GeTicketPriceMustReturnNotNullableTicket()
        {
            var ticketServiceTest = new TicketService();

            Assert.IsNotNull(ticketServiceTest.GetTicketPrice(1));
        }
        public void GeTicketPriceMustThrowException()
        {
            var ticketServiceTest = new TicketService();

            Assert.Throws <TicketNotFoundException>(() => ticketServiceTest.GetTicketPrice(100));
        }