public void Empty()
{
var source = new BreakingReadOnlyList <object>(new List <object>());
var(t, x) = source.SingleOrNone();
Assert.That(t, Is.False);
Assert.That(x, Is.Null);
}
public void One()
{
var source = new BreakingReadOnlyList <int>(new List <int> {
123
});
var(t, x) = source.SingleOrNone();
Assert.That(t, Is.True);
Assert.That(x, Is.EqualTo(123));
}