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