public function range_five()
{
$results = $this->scheduler->startWithCreate(function () {
return Observable::range(10, 5, $this->scheduler);
});
$this->assertMessages([onNext(201, 10), onNext(202, 11), onNext(203, 12), onNext(204, 13), onNext(205, 14), onCompleted(206)], $results->getMessages());
}