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

    public function testSubscriptions()
    {
        $snippet = $this->snippetFromMethod(Topic::class, 'subscriptions');
        $snippet->addLocal('topic', $this->topic);
        $this->connection->listSubscriptionsByTopic(Argument::any())->shouldBeCalled()->willReturn(['subscriptions' => [self::SUBSCRIPTION]]);
        $this->topic->setConnection($this->connection->reveal());
        $res = $snippet->invoke('subscriptions');
        $this->assertInstanceOf(\Generator::class, $res->returnVal());
        $this->assertEquals(self::SUBSCRIPTION, $res->output());
    }