Google\Cloud\Tests\Snippets\PubSub\SubscriptionTest::testClassThroughTopic PHP Method

    public function testClassThroughTopic()
    {
        $snippet = $this->snippetFromClass(Subscription::class);
        $res = $snippet->invoke('subscription');
        $this->assertInstanceOf(Subscription::class, $res->returnVal());
        $this->assertEquals(self::SUBSCRIPTION, $res->returnVal()->name());
    }