test(delay): add test to prove that the previous behavior is composable
test(delay): add test to prove that the previous behavior is composable

martinsik/rxjs,kwonoj/RxJS,benlesh/RxJS,ReactiveX/RxJS,kwonoj/RxJS,kwonoj/RxJS,benlesh/RxJS,martinsik/rxjs,ReactiveX/rxjs,ReactiveX/rxjs,kwonoj/RxJS,ReactiveX/RxJS,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/rxjs,ReactiveX/RxJS,benlesh/RxJS,benlesh/RxJS,martinsik/rxjs,ReactiveX/rxjs