public void OrThrow_DoesNotThrowIfSuccess()
{
var testValue = ""; //to be overwritten by "happy"
Assert.DoesNotThrow(() => testValue = EFailable <string> .Success("HAPPY").OrThrow());
Assert.That(testValue, Is.EqualTo("HAPPY"));
}
public void Map_NestingInMap()
{
var flag = EFailable <bool> .Success(true);
var result = flag.Map(_ => EFailable <bool> .Success(true));
Assert.That(result.Or(EFailable <bool> .Failure(new ArgumentException())).Or(false), Is.True);
}
public void ConvertToEOption_Success()
{
var EFailable = EFailable <string> .Success("hubba");
EOption <string> EOption = EFailable.ToEOption();
Assert.That(EOption.IsSome, Is.True);
}
public void FlatMapToDifferentType()
{
var one = EFailable <int> .Success(1);
EFailable <string> onePlusOne = one.FlatMap(i => EFailable <string> .Success($"{i}+1=2"));
Assert.That(onePlusOne.OrThrow(), Is.EqualTo("1+1=2"));
}
public void Equals_SuccessInequal()
{
var x = EFailable <int> .Success(4);
var y = EFailable <int> .Success(5);
Assert.That(x.Equals(y), Is.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 TryGet_Result_Success()
{
var EFailable = EFailable <string> .Success("blub");
EFailable.TryGetValue(out var s);
Assert.That(s, Is.EqualTo("blub"));
}
public void ConstructSuccess_NotNull()
{
var testValue = EFailable <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 Map_Success()
{
var original = EFailable <string> .Success("hallo");
var result = original.Map(s => s += " welt");
Assert.That(result.OrThrow, Is.EqualTo("hallo welt"));
}
public void ConvertToMaybe_Success()
{
var EFailable = EFailable <string> .Success("hallo");
var maybe = EFailable.ToMaybe();
Assert.That(maybe.IsSome, Is.True);
Assert.That(maybe.OrThrow, Is.EqualTo("hallo"));
}
public void ConvertToOption_Success()
{
var EFailable = EFailable <string> .Success("hubba");
var option = EFailable.ToOption();
Assert.That(option.IsSome, Is.True);
Assert.That(option.OrThrow, Is.EqualTo("hubba"));
}
public void ValuePropagationInFlatMap()
{
var hallo = EFailable <string> .Success("hallo");
var sp = EFailable <string> .Success(" ");
var result = hallo.FlatMap(h => sp.Map(space => h + space + "welt"));
Assert.That(result.Or("nix da"), Is.EqualTo("hallo welt"));
}
public void Map_NestingInFlatMap()
{
var flag1 = EFailable <int> .Success(1);
var flag2 = EFailable <int> .Success(2);
var result = flag1.FlatMap(outerInt => flag2.Map(innerInt => outerInt + innerInt));
Assert.That(result.Or(-999), Is.EqualTo(3));
}
public void OrWithParallelType_Success()
{
var mySubclass = new MySubclass();
var myOtherSubclass = new MyOtherSubclass();
var underTest = EFailable <MyClass> .Success(mySubclass);
var actualValue = underTest.Or(myOtherSubclass);
Assert.That(actualValue, Is.SameAs(mySubclass));
}
public void Equals_FailedInequalToSuccess()
{
var x = EFailable <int> .Failure(new ArgumentException("how appaling!"));
var y = EFailable <int> .Success(0);
var z = EFailable <EFailable <int> > .Success(y);
Assert.That(x.Equals(y), Is.False);
Assert.That(x.Equals(z), Is.False);
}
public void Flatten_Some()
{
var a = EFailable <string> .Success("hallo");
var b = EFailable <EFailable <string> > .Success(EFailable <string> .Success("hallo"));
var c = EFailable <EFailable <string> > .Success(EFailable <string> .Failure(new Exception("")));
Assert.That(b, Is.Not.EqualTo(a));
Assert.That(b.Flatten(), Is.EqualTo(a));
Assert.That(b.Flatten(), Is.Not.EqualTo(c));
}
public void Equals_SuccessEqual()
{
var t1 = new Tuple <string, int>("abc", 123);
var t2 = new Tuple <string, int>("abc", 123);
var x = EFailable <Tuple <string, int> > .Success(t1);
var y = EFailable <Tuple <string, int> > .Success(t2);
Assert.That(t1.Equals(t2), Is.True);
Assert.That(x.Equals(y), Is.True);
}
public void Equals_DifferentTypeInequal()
{
var t1 = new Tuple <string, int>("abc", 123);
var t2 = new Tuple <string, string>("abc", "123");
var x = EFailable <Tuple <string, int> > .Success(t1);
var y = EFailable <Tuple <string, string> > .Success(t2);
Assert.That(t1.Equals(t2), Is.False);
Assert.That(x.Equals(y), Is.False);
}
public void Flatten_Failure()
{
var a = EFailable <string> .Failure(new Exception( "" ));
var b = EFailable <EFailable <string> > .Success(a); //use same instance so that Exception.Equals() returns true
var c = EFailable <EFailable <string> > .Success(EFailable <string> .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 Map_NestingInFlatMap_FlattenToOption()
{
var flag1 = EFailable <int> .Success(1);
var flag2 = Option <int, Exception> .Some(2);
#pragma warning disable CS0618 // Type or member is obsolete
var result = flag1.FlatMap(outerInt => flag2.Map(innerInt => outerInt + innerInt));
#pragma warning restore CS0618
Assert.True(result.IsSome);
Assert.That(result.Or(-999), Is.EqualTo(3));
}
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 = EFailable <EFailable <int> > .Success(EFailable <int> .Success(123));
var successInnerFail = EFailable <EFailable <int> > .Success(EFailable <int> .Failure(new ArgumentException()));
var failureInnerSuccess = EFailable <EFailable <int> > .Failure(new ArgumentException());
var failureInnerFail = EFailable <EFailable <int> > .Failure(new ArgumentException());
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);
}
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 Or_Value()
{
Assert.That(EFailable <int> .Success(1).Or(2), Is.EqualTo(1));
}
public void Error_ThrowsIfSuccess()
{
Assert.Throws <FailableNoFailureException>(() => EFailable <string> .Success("HAPPY").FailureOrThrow());
}
public void TryGet_Value_Success()
{
var EFailable = EFailable <string> .Success("blub");
Assert.IsTrue(EFailable.TryGetValue(out var s));
}
public void Is_PredicateNonMatchingDefined()
{
var EFailable = EFailable <string> .Success("hubba");
Assert.That(EFailable.Holds(s => s.Equals("hubba-hub")), Is.EqualTo(false));
}
public void Is_DefinedFalse()
{
var f = EFailable <string> .Success("hubba");
Assert.That(f.Is("whatever"), Is.EqualTo(false));
}
public void Is_DefinedTrue()
{
var f = EFailable <string> .Success("hubba");
Assert.That(f.Is("hubba"), Is.EqualTo(true));
}
public void ConstructSuccess_Null()
{
Assert.That(() => EFailable <object> .Success(null), Throws.TypeOf <FailableSuccessConstructionException>());
}