chore(test): use test marbles for window operator spec
chore(test): use test marbles for window operator spec

Brocco/RxJS,staltz/RxJSNext,adrianomelo/RxJSNext,saneyuki/RxJS,IgorMinar/RxJS,gluck/RxJS,RxJS-CN/RxJS-Docs-CN,adrianomelo/RxJSNext,RxJS-CN/RxJS-Docs-CN,adrianomelo/RxJS-1,luisgabriel/RxJS,kwonoj/RxJS,mattpodwysocki/RxJS,jadbox/RxJS,jinroh/RxJS,Igorbek/rxjs5,trxcllnt/RxJS,luisgabriel/RxJS,staltz/RxJSNext,jayphelps/rxjs,SangKa/RxJS-Docs-CN,Brocco/RxJS,ReactiveX/rxjs,martinsik/rxjs,adrianomelo/RxJS-1,adrianomelo/RxJS-1,martinsik/rxjs,justinwoo/RxJS,jinroh/RxJS,martinsik/rxjs,Igorbek/rxjs5,robwormald/RxJS,elliotschi/rxjs,jinroh/RxJS,figueredo/RxJS,saneyuki/RxJS,ReactiveX/rxjs,benlesh/RxJS,elliotschi/rxjs,adrianomelo/RxJS-1,jayphelps/rxjs,kwonoj/RxJS,RxJS-CN/RxJS-Docs-CN,mattpodwysocki/RxJS,jinroh/RxJS,elliotschi/rxjs,benlesh/RxJS,justinwoo/RxJS,trxcllnt/RxJS,jadbox/RxJS,trxcllnt/RxJS,ReactiveX/RxJS,gluck/RxJS,jayphelps/rxjs,robwormald/RxJS,ReactiveX/rxjs,adrianomelo/RxJSNext,gluck/RxJS,jayphelps/rxjs,robwormald/RxJS,SangKa/RxJS-Docs-CN,figueredo/RxJS,kwonoj/RxJS,IgorMinar/RxJS,ReactiveX/rxjs,adrianomelo/RxJSNext,figueredo/RxJS,martinsik/rxjs,jayphelps/rxjs,jadbox/RxJS,figueredo/RxJS,luisgabriel/RxJS,ReactiveX/RxJS,gluck/RxJS,Igorbek/rxjs5,luisgabriel/RxJS,mattpodwysocki/RxJS,mattpodwysocki/RxJS,elliotschi/rxjs,ReactiveX/RxJS,Brocco/RxJS,Brocco/RxJS,staltz/RxJSNext,staltz/RxJSNext,benlesh/RxJS,RxJS-CN/RxJS-Docs-CN,justinwoo/RxJS,kwonoj/RxJS,SangKa/RxJS-Docs-CN,benlesh/RxJS,trxcllnt/RxJS,jadbox/RxJS,ReactiveX/RxJS,robwormald/RxJS,SangKa/RxJS-Docs-CN,Igorbek/rxjs5,justinwoo/RxJS