public void Where_returns_None_when_inner_value_does_not_meet_predicate()
{
var enclosedValue = 0;
var option = new Optional<int>(enclosedValue);
var actual = option.Where(i => i > 0);
Assert.That(actual, Is.EqualTo(Optional<int>.None));
}
public void Where_returns_Some_when_inner_value_meets_predicate()
{
var enclosedValue = 0;
var option = new Optional<int>(enclosedValue);
var actual = option.Where(i => i == 0);
Assert.That(actual, Is.EqualTo(Optional<int>.Create(enclosedValue)));
}
public void Where_returns_none_on_None()
{
var none = new Optional<object>();
var actual = none.Where(_ => true);
Assert.That(actual, Is.EqualTo(Optional<object>.None));
}