Rx\Functional\Operator\GroupByUntilTest::groupByUntilDurationSelectorThrows PHP Method

    public function groupByUntilDurationSelectorThrows()
    {
        $error = new \Exception();
        $xs = $this->createHotObservable([onNext(210, 'foo')]);
        $results = $this->scheduler->startWithCreate(function () use($xs, $error) {
            return $xs->groupByUntil(function ($x) {
                return $x;
            }, function ($x) {
                return $x;
            }, function () use($error) {
                throw $error;
            });
        });
        $this->assertMessages([onError(210, $error)], $results->getMessages());
        $this->assertSubscriptions([subscribe(200, 210)], $xs->getSubscriptions());
    }