public function startWith_one()
{
$xs = $this->createHotObservable([onNext(150, 1), onNext(220, 2), onCompleted(250)]);
$results = $this->scheduler->startWithCreate(function () use($xs) {
return $xs->startWith(1);
});
$this->assertMessages([onNext(201, 1), onNext(220, 2), onCompleted(250)], $results->getMessages());
}