public void AsIFutureEnumerable()
{
DataProducer <string> subject = new DataProducer <string>();
IFuture <IEnumerable <string> > result = subject.AsFutureEnumerable();
subject.ProduceAndEnd("a", "b", "c", "d");
Assert.IsTrue(result.Value.SequenceEqual(new[] { "a", "b", "c", "d" }));
}