Either <string, BookTransfer> ValidateBic(BookTransfer transfer)
{
if (!_bicRegex.IsMatch(transfer.Bic))
{
return("not in bic format");
}
return(transfer);
}
Either <string, BookTransfer> ValidateDate(BookTransfer transfer)
{
if (transfer.Date <= DateTime.Now)
{
return("Date is in the past");
}
return(transfer);
}
public void Should_bind_function_calls_passing_error()
{
var transfer2 = new BookTransfer("11ABaHIJK", DateTime.Now.AddMinutes(1));
Assert.Equal(F.Left("not in bic format").ToString(), Handle(transfer2).ToString());
}
public void Should_bind_function_calls_passing_correct_value()
{
var transfer1 = new BookTransfer("ABCDEFGHIJK", DateTime.Now.AddMinutes(1));
Assert.Equal(F.Right(transfer1).ToString(), Handle(transfer1).ToString());
}
Either <string, BookTransfer> Handle(BookTransfer transfer) => F.Right(transfer) .Bind(ValidateBic) .Bind(ValidateDate);