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 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));
}
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 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 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 TryGet_Value_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
failable.TryGetValue(out var s);
Assert.IsNull(s);
}
public void ConvertToMaybe_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
var maybe = failable.ToMaybe();
Assert.That(maybe.IsNone, Is.True);
}
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 ConvertToOption_None()
{
var failable = Failable <string, int> .Failure(42);
var option = failable.ToOption();
Assert.That(option.IsFailure, Is.True);
}
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 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 ConvertToEFailable_Failure()
{
var failable = Failable <string, bool> .Failure(true);
EFailable <string> EFailable = failable.ToEFailable(new ArgumentException("msg"));
Assert.That(EFailable.IsFailure, Is.True);
Assert.That(EFailable.FailureOrThrow().Message, Is.EqualTo("msg"));
}
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"));
}
public void Map_Failure_SideEffect()
{
var myInt = 0;
var original = Failable <string, bool> .Failure(false);
var result = original.Map(s => ++ myInt);
Assert.That(myInt, Is.EqualTo(0));
}
public void TryGet_ErrorResult_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException("msg"));
failable.TryGetFailure(out var e);
Assert.That(e, Is.TypeOf <ArgumentException>());
Assert.That(e.Message, Is.EqualTo("msg"));
}
public void OrWithParallelType_Failure()
{
var myOtherSubclass = new MyOtherSubclass();
var underTest = Failable <MyClass, Exception> .Failure(new ArgumentException( "irrelevant" ));
var actualValue = underTest.Or(myOtherSubclass);
Assert.That(actualValue, Is.SameAs(myOtherSubclass));
}
public void Equals_FailedInequalToSuccess()
{
var x = Failable <int, string> .Failure("how appaling!");
var y = Failable <int, string> .Success(0);
var z = Failable <Failable <int, string>, string> .Success(y);
Assert.That(x.Equals(y), Is.False);
Assert.That(x.Equals(z), Is.False);
}
public void Flatten_Failure()
{
var a = Failable <string, int> .Failure(42);
var b = Failable <Failable <string, int>, int> .Success(Failable <string, int> .Failure(42));
var c = Failable <Failable <string, int>, int> .Success(Failable <string, int> .Success("whatever"));
Assert.That(b, Is.Not.EqualTo(a));
Assert.That(b.Flatten(), Is.EqualTo(a));
Assert.That(b.Flatten(), Is.Not.EqualTo(c));
}
public void Flatten_DifferentFailType_Failure()
{
var a = Failable <string, int> .Failure(42);
var b = Failable <Failable <string, string>, int> .Success(Failable <string, string> .Failure("error"));
var c = Failable <Failable <string, string>, int> .Success(Failable <string, string> .Success("whatever"));
Assert.That(b, Is.Not.EqualTo(a));
Assert.That(b.Flatten((s) => 42), Is.EqualTo(a));
Assert.That(b.Flatten((s) => 42), Is.Not.EqualTo(c));
}
public void Equals_Failable_DifferentType()
{
var aEFail = EFailable <int> .Success(4);
var aFail = Failable <int, string> .Success(4);
var exception = new ArgumentException();
var bEFail = EFailable <int> .Failure(exception);
var bFail = Failable <int, string> .Failure("whatever");
Assert.That(aEFail, Is.Not.EqualTo(aFail));
Assert.That(bEFail, Is.Not.EqualTo(bFail));
Assert.That(aFail, Is.Not.EqualTo(aEFail));
Assert.That(bFail, Is.Not.EqualTo(bEFail));
}
public void Nesting()
{
var successInnerSuccess = Failable <Failable <int, string>, string> .Success(Failable <int, string> .Success(123));
var successInnerFail = Failable <Failable <int, string>, string> .Success(Failable <int, string> .Failure("hallo"));
var failureInnerSuccess = Failable <int, Failable <int, string> > .Failure(Failable <int, string> .Success(123));
var failureInnerFail = Failable <int, Failable <int, string> > .Failure(Failable <int, string> .Failure("hallo"));
Assert.That(successInnerSuccess.IsSuccess, Is.True);
Assert.That(successInnerFail.IsSuccess, Is.True);
Assert.That(successInnerSuccess.OrThrow().IsSuccess, Is.True);
Assert.That(successInnerFail.OrThrow().IsSuccess, Is.False);
Assert.That(failureInnerSuccess.IsSuccess, Is.False);
Assert.That(failureInnerFail.IsSuccess, Is.False);
Assert.That(failureInnerSuccess.FailureOrThrow().IsSuccess, Is.True);
Assert.That(failureInnerFail.FailureOrThrow().IsSuccess, Is.False);
}
public void Equals_Failable()
{
var aEFail = EFailable <int> .Success(4);
var aFail = Failable <int, Exception> .Success(4);
var exception = new ArgumentException();
var bEFail = EFailable <int> .Failure(exception);
var bFail = Failable <int, Exception> .Failure(exception);
Assert.That(aEFail.GetHashCode(), Is.EqualTo(aFail.GetHashCode()), "HashCode not correct (Success-Case)");
Assert.That(bEFail.GetHashCode(), Is.EqualTo(bFail.GetHashCode()), "HashCode not correct (Failure-Case)");
Assert.That(aEFail, Is.EqualTo(aFail), "EFailable-Equals is buggy! (Success-Case)");
Assert.That(bEFail, Is.EqualTo(bFail), "EFailable-Equals is buggy! (Failure-Case)");
Assert.That(aFail, Is.EqualTo(aEFail), "Implementation of Failable is not accepting EFailable! (Success-Case)");
Assert.That(bFail, Is.EqualTo(bEFail), "Implementation of Failable is not accepting EFailable! (Failure-Case)");
Assert.That(aEFail, Is.Not.EqualTo(bFail)); //sanity-check
}
public void Equals_Option_DifferentType()
{
var aEOption = EOption <int> .Some(4);
var aOption = Option <int, string> .Some(4);
var bEOption = EOption <int> .None;
var bOption = Option <int, string> .None;
var exception = new ArgumentException();
var cEOption = EFailable <int> .Failure(exception);
var cOption = Failable <int, string> .Failure("whatever");
Assert.That(aEOption, Is.Not.EqualTo(aOption));
Assert.That(bEOption, Is.Not.EqualTo(bOption));
Assert.That(cEOption, Is.Not.EqualTo(cOption));
Assert.That(aOption, Is.Not.EqualTo(aEOption));
Assert.That(bOption, Is.Not.EqualTo(bEOption));
Assert.That(cOption, Is.Not.EqualTo(cEOption));
}
public void TryGet_Result_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
Assert.IsFalse(failable.TryGetValue(out var s));
}
public void ContainsFalseWhenNone()
{
var f = Failable <string, Exception> .Failure(new ArgumentException());
Assert.That(f.Is("hubba"), Is.EqualTo(false));
}
public void Is_PredicateUndefined()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
Assert.That(failable.Holds(s => s.Equals("hubba-hub")), Is.EqualTo(false));
}
public void TryGet_Error_Failure()
{
var failable = Failable <string, Exception> .Failure(new ArgumentException());
Assert.IsTrue(failable.TryGetFailure(out var s));
}