public void Empty()
{
var source = Empty <object>().Hide();
var(t, x) = source.LastOrNone(BreakingFunc.Of <object, bool>());
Assert.That(t, Is.False);
Assert.That(x, Is.Null);
}
public void Many()
{
var source = MoreEnumerable.From(() => 123, BreakingFunc.Of <int>());
var(t, x) = source.FirstOrNone();
Assert.That(t, Is.True);
Assert.That(x, Is.EqualTo(123));
}
public void ManyMatch()
{
var(t, x) =
Source.Concat(MoreEnumerable.From(BreakingFunc.Of <int>()))
.SingleOrNone(x => x > 200);
Assert.That(t, Is.False);
Assert.That(x, Is.Zero);
}
public void Many()
{
var source = MoreEnumerable.From(() => 123, () => 456, BreakingFunc.Of <object>());
var(t, x) = source.SingleOrNone();
Assert.That(t, Is.False);
Assert.That(x, Is.Null);
}
public void NullSource()
{
var e = Assert.Throws <ArgumentNullException>(() =>
Enumerable.LastOrNone(null, BreakingFunc.Of <object, bool>()));
Assert.That(e.ParamName, Is.EqualTo("source"));
}
public void MatchWithNullSomeFunction(bool f, int v)
{
var e = Assert.Throws <ArgumentNullException>(() =>
Option.From(f, v).Match(null, BreakingFunc.Of <_>()));
Assert.That(e.ParamName, Is.EqualTo("some"));
}