Rx\Functional\Operator\ConcatTest::testConcatNeverReturn PHP Method

    public function testConcatNeverReturn()
    {
        $e1 = $this->createHotObservable([onNext(150, 1), onNext(210, 2), onCompleted(230)]);
        $e2 = Observable::never();
        $results = $this->scheduler->startWithCreate(function () use($e1, $e2) {
            return $e2->concat($e1);
        });
        $this->assertMessages([], $results->getMessages());
    }