public void SingleOrNone_AppliedToFailingEnumerator_DoesNotThrow()
{
var sequence = new YieldElementsThenFail <string>("Hello world", 2);
Assert.Throws <InvalidOperationException>(() => sequence.SingleOrNone());
Assert.Throws <AssertionException>(() => sequence.ToList());
}
public void FirstOrNone_AppliedToFailingEnumerator_DoesNotThrow()
{
var sequence = new YieldElementsThenFail <string>("Hello world", 1);
var composition = sequence.FirstOrNone();
Assert.IsTrue(composition.IsSome);
Assert.Throws <AssertionException>(() => sequence.ToList());
}