private static Failable <T> Where <T>(T value, Func <T, bool> predicate, Exception error)
{
#pragma warning disable CS8604
if (predicate(value) is false)
{
return(Failable.FromException <T>(error));
}
return(Failable.From(value));
}
public void Should_Run_Failure_Given_Failure_Value()
{
var nothing = Nothing.Of();
var failable =
nothing
.Do(() => Failable.FromException <string>(new Exception("It could not create a failable")))
.Match(
success: (value) => throw new Exception("Test has failed. It should run failure"), // fail
failure: (error) => Assert.Equal("It could not create a failable", error.Message) // pass
);
}
public void Should_Not_Select_From_Exception()
{
Failable <bool> input = Failable.FromException <bool>(new Exception("It should not create a value"));
Failable <bool> value =
input
.Select();
value.Match(
success: (value) => throw new Exception("Test has failed. It should not run the select function"),
failure: (error) => Assert.Equal("It should not create a value", error.Message)
);
}