Google\Cloud\Tests\Snippets\PubSub\TopicTest::testSubscribe PHP Method

    public function testSubscribe()
    {
        $snippet = $this->snippetFromMethod(Topic::class, 'subscribe');
        $snippet->addLocal('topic', $this->topic);
        $this->connection->createSubscription(Argument::any())->shouldBeCalled()->willReturn(['name' => self::SUBSCRIPTION]);
        $this->topic->setConnection($this->connection->reveal());
        $res = $snippet->invoke('subscription');
        $this->assertInstanceOf(Subscription::class, $res->returnVal());
    }