public void Put()
        {
            //act
            string result = aircraftsController.Put(1, new AircraftDTO()).ToString();

            //assert
            Assert.That(result != "null");
        }
        public async Task Put_WhenNull_ReturnBadRequest()
        {
            IActionResult result = await aircraftsController.Put(0, null);

            Assert.True(result is BadRequestObjectResult);
        }