public static void TestConversion()
{
Coroutines cors = new Coroutines();
cors.Run(OnePlusTwoFrames(Cancellable.Null));
cors.Step();
Assert.AreEqual(cors.Count, 1);
IEnumerator ienum = cors.AsIEnum();
Assert.IsTrue(ienum.MoveNext());
Assert.IsFalse(ienum.MoveNext());
ienum = cors.AsIEnum();
Assert.IsFalse(ienum.MoveNext());
}