public void BindShouldNotInvokeFuncWhenException()
{
// Arrange
var exception = new SomeException("Some exception");
Exceptional <int> exceptional = exception;
Exceptional <bool> exceptionalWithSuccess = true;
var anotherException = new SomeException("Some another exception");
Exceptional <bool> exceptionalWithException = anotherException;
Func <int, Exceptional <bool> > toAnotherExceptional = (i) =>
{
if (i.Equals(1))
{
return(exceptionalWithSuccess);
}
else
{
return(exceptionalWithException);
}
};
// Act
var result = exceptional.Bind(toAnotherExceptional);
// Assert
result.ToString().Should().Be(exceptional.ToString());
}
public void BindShouldSucceedWhenSuccess()
{
// Arrange
var value = 1;
Exceptional <int> exceptional = value;
Exceptional <bool> exceptionalWithSuccess = true;
var exception = new SomeException("Some exception");
Exceptional <bool> exceptionalWithException = exception;
Func <int, Exceptional <bool> > toAnotherExceptional = (i) =>
{
if (i.Equals(1))
{
return(exceptionalWithSuccess);
}
else
{
return(exceptionalWithException);
}
};
// Act
var result = exceptional.Bind(toAnotherExceptional);
// Assert
result.Should().Be(exceptionalWithSuccess);
}
public void Bind_Transform_ET_To_ER(int?num)
{
Exceptional <int> valid = num.HasValue ? (Exceptional <int>)num : (ErrorException)("num is null");
bool isValid = num.HasValue;
var res = valid.Bind(i => (Exceptional <string>) $"val is {i}");
res.Match(err => Assert.Equal("num is null", err.Message),
msg => Assert.Equal($"val is {num}", msg)
);
}
static Exceptional <R> Apply <T, R>(this Exceptional <Func <T, R> > exceptionalF, Exceptional <T> exceptionalT) => exceptionalT.Bind(t => exceptionalF.Bind <Func <T, R>, R>(f => f(t)));
public static Exceptional <R> SelectMany <T, R>(this Exceptional <T> exceptional, Func <T, Exceptional <R> > func) => exceptional.Bind(func);
/// <summary> /// Binds an <see cref="Exceptional"/> inner value with an async func and awaits for it to finish /// </summary> public static Exceptional <RR> BindTask <R, RR>(this Exceptional <R> @this, Func <R, Task <Exceptional <RR> > > func) => @this.Bind(e => func(e).GetAwaiter().GetResult());
