public void TestValidateAirportCode()
{
var validationResult = flightsService.ValidateAirportCodeAsync("A").Result;
Assert.IsFalse(validationResult.IsValid);
Assert.AreEqual(ValidationErrorType.BadFormat, validationResult.ErrorType);
validationResult = flightsService.ValidateAirportCodeAsync("AAAAAAAA").Result;
Assert.IsFalse(validationResult.IsValid);
Assert.AreEqual(ValidationErrorType.BadFormat, validationResult.ErrorType);
validationResult = flightsService.ValidateAirportCodeAsync("EMPT").Result;
Assert.IsFalse(validationResult.IsValid);
Assert.AreEqual(ValidationErrorType.NotFound, validationResult.ErrorType);
validationResult = flightsService.ValidateAirportCodeAsync("VOZ").Result;
Assert.IsTrue(validationResult.IsValid);
}