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

    public function testConcatNeverNever()
    {
        $e1 = Observable::never();
        $e2 = Observable::never();
        $results = $this->scheduler->startWithCreate(function () use($e1, $e2) {
            return $e1->concat($e2);
        });
        $this->assertMessages([], $results->getMessages());
    }