public void Wrapped_apps_onNext_gets_rescheduled_continuation_iff_wrapping_app_provides_continuation()
        {
            var app = new StaticApp(null, null, null);

            bool gotComplete = false;
            int gotOnNext = 0;
            Action ack0 = null;
            Action ack1 = null;

            var scheduler = new MockScheduler();

            app.OnRequest = () => {
                var env = new Environment(app.Env);

                env.Body((data, ack) => {
                    gotOnNext++;

                    if (gotOnNext == 1)
                        ack0 = ack;
                    if (gotOnNext == 2)
                        ack1 = ack;

                    if (ack == null)
                        return false;
                    else
                    {
                        return true;
                    }
                },
                e => {
                },
                () => { gotComplete = true; });
            };

            var middleware = new RescheduleCallbacksMiddleware(app.Invoke, scheduler);

            scheduler.Post(() =>
            {
                middleware.Invoke(new Environment() {
                    Body = (onNext, onError, onComplete) => {
                        onNext(default(ArraySegment<byte>), null);
                        onNext(default(ArraySegment<byte>), () => onComplete());
                        return () => { };
                    }
                }, (status, headers, body) =>
                {

                },
                e => { });
            });

            scheduler.Start();

            Assert.That(gotOnNext, Is.EqualTo(2));
            Assert.That(ack0, Is.Null);
            Assert.That(ack1, Is.Not.Null);

            // queues the continuation (which invokes onComplete) on the scheduler. onComplete should not be called yet.
            ack1();
            Assert.That(gotComplete, Is.False);

            // now run the scheduler more. after its done onComplete should have been called.
            scheduler.Start();
            Assert.That(gotComplete, Is.True);
        }