public static Result <UserCardDigits> Create(Maybe <string> cardDigits)
{
return(cardDigits.ToResult("Card number cannot be an empty string.")
.OnSuccess(cardDigits => cardDigits.Trim())
.Ensure(cardDigits => cardDigits.All(char.IsDigit), "Card number must only contain numbers.")
.Ensure(cardDigits => cardDigits.Length == 3, "Card number must contain 3 digits.")
.Map(cardDigits => new UserCardDigits(cardDigits)));
}
public void MaybeAll_Mixed_Nothing()
{
// arrange
var listOfMaybes = new[] {
Maybe.Of(1),
Maybe <int> .Nothing,
Maybe.Of(3),
};
// act
var maybeList = Maybe.All(listOfMaybes);
// assert
Assert.True(maybeList.IsNothing);
Assert.False(maybeList.IsJust);
}
public void MaybeAll_Ok()
{
// arrange
var listOfMaybes = new [] {
Maybe.Of(1),
Maybe.Of(2),
Maybe.Of(3),
};
// act
var maybeList = Maybe.All(listOfMaybes);
// assert
Assert.True(maybeList.IsJust);
Assert.False(maybeList.IsNothing);
//Assert.IsAssignableFrom(typeof(IEnumerable<int>), maybeList.UnsafelyUnwrap());
Assert.Equal(new[] { 1, 2, 3 }, maybeList.UnsafelyUnwrap());
}
