public void ConstructFailure_ErrorNotNull()
{
var testValue = Failable <object, object> .Failure(new object());
Assert.That(testValue.IsSuccess, Is.False);
Assert.That(testValue.IsFailure, Is.True);
}
public void Should_Not_Select_Square_Of_Ten_Given_Failed_State()
{
Failable <int> input = default;
// From value
input
.Pipe(
Where <int>(x => x % 2 == 1)
)
.Select(_ => _ * _)
.Match(
success: (_) => throw new Exception("Test has failed"),
failure: (_) => Assert.Equal(WHERE_EXCEPTION_MESSAGE, _.Message)
);
// From exception
Failable
.From <object>(new Exception("It could not create the value"))
.Pipe(
Where <object>(x => x is not Exception)
)
.Match(
success: (_) => throw new Exception("Test has failed"),
failure: (_) => Assert.Equal("It could not create the value", _.Message)
);
}
public void Equals_Option()
{
var aEOption = EOption <int> .Some(4);
var aOption = Option <int, Exception> .Some(4);
var bEOption = EOption <int> .None;
var bOption = Option <int, Exception> .None;
var exception = new ArgumentException();
var cEOption = EFailable <int> .Failure(exception);
var cOption = Failable <int, Exception> .Failure(exception);
Assert.That(aEOption.GetHashCode(), Is.EqualTo(aOption.GetHashCode()), "HashCode not correct (Success-Case)");
Assert.That(bEOption.GetHashCode(), Is.EqualTo(bOption.GetHashCode()), "HashCode not correct (None-Case)");
Assert.That(cEOption.GetHashCode(), Is.EqualTo(cOption.GetHashCode()), "HashCode not correct (Failure-Case)");
Assert.That(aEOption, Is.EqualTo(aOption), "EOption-Equals is buggy! (Some-Case)");
Assert.That(bEOption, Is.EqualTo(bOption), "EOption-Equals is buggy! (None-Case)");
Assert.That(cEOption, Is.EqualTo(cOption), "EOption-Equals is buggy! (Failure-Case)");
Assert.That(aOption, Is.EqualTo(aEOption), "Implementation of Option is not accepting EOption! (Some-Case)");
Assert.That(bOption, Is.EqualTo(bEOption), "Implementation of Option is not accepting EOption! (None-Case)");
Assert.That(cOption, Is.EqualTo(cEOption), "Implementation of Option is not accepting EOption! (Failure-Case)");
Assert.That(aEOption, Is.Not.EqualTo(bOption)); //sanity-checks
Assert.That(cOption, Is.Not.EqualTo(bEOption));
}
private void onRegisterRejected(object sender, Failable e)
{
switch (e.ErrorCode)
{
case 3:
DisplayAlert("Fehler", Strings.Error_MailAlreadyInUse, "OK");
break;
case 4:
DisplayAlert("Fehler", Strings.Error_UsernameAlreadyInUse, "OK");
break;
case 5:
DisplayAlert("Fehler", Strings.Error_InvalidMail, "OK");
break;
case 12:
DisplayAlert("Fehler", Strings.Error_InvalidUsername, "OK");
break;
case 13:
DisplayAlert("Fehler", Strings.Error_InvalidPassword, "OK");
break;
default:
OnError(sender, e);
break;
}
}
public void OrThrow_DoesNotThrowIfSuccess()
{
var testValue = ""; //to be overwritten by "happy"
Assert.DoesNotThrow(() => testValue = Failable <string, int> .Success("HAPPY").OrThrow());
Assert.That(testValue, Is.EqualTo("HAPPY"));
}
public void OrThrowWithText_DoesNotThrowIfSuccess()
{
var testValue = 0;
Assert.DoesNotThrow(() => testValue = Failable <int, int> .Success(1).OrThrow("Test"));
Assert.That(testValue, Is.EqualTo(1));
}
public void MapFailure_Success()
{
var original = Failable <bool, string> .Success(false);
var result = original.MapFailure(s => s += " welt");
Assert.That(result.OrThrow(), Is.EqualTo(false));
}
public void MapFailure_Failure()
{
var original = Failable <bool, string> .Failure("hallo");
var result = original.MapFailure(s => s += " welt");
Assert.That(result.FailureOrThrow(), Is.EqualTo("hallo welt"));
}
public void Map_NestingInMap()
{
var flag = Failable <bool, string> .Success(true);
var result = flag.Map(_ => Failable <bool, string> .Success(true));
Assert.That(result.Or(Failable <bool, string> .Failure("disgusting")).Or(false), Is.True);
}
public void Equals_SuccessInequal()
{
var x = Failable <int, string> .Success(4);
var y = Failable <int, string> .Success(5);
Assert.That(x.Equals(y), Is.False);
}
public void TryGet_Result_Success()
{
var failable = Failable <string, Exception> .Success("blub");
failable.TryGetValue(out var s);
Assert.That(s, Is.EqualTo("blub"));
}
public void OrThrowWithText_DoesThrowIfFailure()
{
var f = Failable <string, int> .Failure(-1);
var excp = Assert.Throws <FailableFailureException>(() => f.OrThrow("test"));
Assert.That(excp.Message, Is.EqualTo("test"));
}
public void ConstructSuccess_NotNull()
{
var testValue = Failable <object, object> .Success(new object());
Assert.That(testValue.IsSuccess, Is.True);
Assert.That(testValue.IsFailure, Is.False);
Assert.That(testValue.Enum, Is.EqualTo(FlbType.Success));
}
public void Equals_DifferentTypeInequalForFailure()
{
var x = Failable <int, string> .Failure("horrible");
var y = Failable <object, string> .Failure("horrible");
Assert.That(x.Equals(y), Is.False);
}
public void Equals_FailedInequal()
{
var x = Failable <object, string> .Failure("what a disappointment");
var y = Failable <object, string> .Failure("yet another disappointment");
Assert.That(x.Equals(y), Is.False);
}
public void Equals_FailedEqual()
{
var x = Failable <object, int> .Failure(123);
var y = Failable <object, int> .Failure(123);
Assert.That(x.Equals(y), Is.True);
}
public void MapFailureToDifferentType()
{
var one = Failable <bool, int> .Failure(1);
Failable <bool, string> onePlusOne = one.MapFailure(i => $"{i}+1=2");
Assert.That(onePlusOne.FailureOrThrow(), Is.EqualTo("1+1=2"));
}
public void ConvertToMaybe_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
var maybe = failable.ToMaybe();
Assert.That(maybe.IsNone, Is.True);
}
public void TryGet_Value_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
failable.TryGetValue(out var s);
Assert.IsNull(s);
}
public void ConvertToOption_Some()
{
var failable = Failable <string, int> .Success("hubba");
var option = failable.ToOption();
Assert.That(option.IsSome, Is.True);
}
public void TryGet_ErrorResult_Success()
{
var failable = Failable <string, Exception> .Success("blah");
failable.TryGetFailure(out var s);
Assert.IsNull(s);
}
public void ConvertToFailable_None()
{
var maybe = Maybe <string> .None;
Failable <string, ArgumentException> failable = maybe.ToFailable(new ArgumentException("msg"));
Assert.That(failable.IsFailure, Is.True);
Assert.That(failable.FailureOrThrow().Message, Is.EqualTo("msg"));
}
public void ConvertToOption_None()
{
var failable = Failable <string, int> .Failure(42);
var option = failable.ToOption();
Assert.That(option.IsFailure, Is.True);
}
public void Map_Success()
{
var original = Failable <string, bool> .Success("hallo");
var result = original.Map(s => s += " welt");
Assert.That(result.OrThrow, Is.EqualTo("hallo welt"));
}
public void ConvertToOption_SwitchValueType_None()
{
var failable = Failable <string, int> .Failure(42);
var option = failable.ToOptionWith((s) => true);
Assert.That(option.IsFailure, Is.True);
}
public void Map_Failure()
{
var original = Failable <string, bool> .Failure(false);
var result = original.Map(s => s += " welt");
Assert.That(result.FailureOrThrow, Is.EqualTo(false));
}
public void ConvertToFailable_Success()
{
var EFailable = EFailable <string> .Success("hubba");
Failable <string, Exception> failable = EFailable.ToFailable();
Assert.That(failable.IsSuccess, Is.True);
}
public void ConvertFailable_Failure()
{
var EFailable = EFailable <string> .Failure(new ArgumentException( "abc" ));
Failable <string, Exception> failable = EFailable.ToFailable();
Assert.That(failable.IsFailure, Is.True);
}
public void FlatMapToDifferentType()
{
var one = Failable <int, bool> .Success(1);
Failable <string, bool> onePlusOne = one.FlatMap(i => Failable <string, bool> .Success($"{i}+1=2"));
Assert.That(onePlusOne.OrThrow(), Is.EqualTo("1+1=2"));
}
public void ConvertToEFailable_WithConverter_Failure()
{
var failable = Failable <int, string> .Failure("will-be-overwritten");
var eFailable = failable.ToEFailableWith(i => $"1{i}", new Exception("new"));
Assert.That(eFailable.IsFailure, Is.True);
Assert.That(eFailable.FailureOrThrow().Message, Is.EqualTo("new"));
}