public void Test2Update() { // Arrange var ticketPL = new TicketPL() { Id = 2, FlightForeignKey = 1, Price = 500 }; // Act serviceTicket.PutTicket(ticketPL); var num = serviceTicket.GetFlightsFromDS().FirstOrDefault(f => f.Id == ticketPL.FlightForeignKey).Number; var ticketDto = serviceTicket.GetTickets().FirstOrDefault(t => t.Id == ticketPL.Id); // Assert Assert.Equal(ticketPL.Id, ticketDto.Id); Assert.Equal(num, ticketDto.FlightNumber); Assert.Equal(ticketPL.Price, ticketDto.Price); }