Rx\Functional\Operator\ConcatMapTest::concatMapTo_Then_Complete_Complete_2 PHP Method

    public function concatMapTo_Then_Complete_Complete_2()
    {
        $xs = $this->createColdObservable([onNext(100, 4), onNext(200, 2), onNext(300, 3), onNext(400, 1), onCompleted(700)]);
        $ys = $this->createColdObservable([onNext(50, 'foo'), onNext(100, 'bar'), onNext(150, 'baz'), onNext(200, 'qux'), onCompleted(250)]);
        $results = $this->scheduler->startWithDispose(function () use($xs, $ys) {
            return $xs->concatMapTo($ys);
        }, 2000);
        $this->assertMessages([onNext(350, 'foo'), onNext(400, 'bar'), onNext(450, 'baz'), onNext(500, 'qux'), onNext(600, 'foo'), onNext(650, 'bar'), onNext(700, 'baz'), onNext(750, 'qux'), onNext(850, 'foo'), onNext(900, 'bar'), onNext(950, 'baz'), onNext(1000, 'qux'), onNext(1100, 'foo'), onNext(1150, 'bar'), onNext(1200, 'baz'), onNext(1250, 'qux'), onCompleted(1300)], $results->getMessages());
        $this->assertSubscriptions([subscribe(200, 900)], $xs->getSubscriptions());
        $this->assertSubscriptions([subscribe(300, 550), subscribe(550, 800), subscribe(800, 1050), subscribe(1050, 1300)], $ys->getSubscriptions());
    }