public function testSubscribe() { $subscriptionData = ['name' => 'projects/project-name/subscriptions/subscription-name', 'topic' => 'projects/project-name/topics/topic-name']; $this->connection->createSubscription(Argument::withEntry('foo', 'bar'))->willReturn($subscriptionData)->shouldBeCalledTimes(1); $topic = new Topic($this->connection->reveal(), 'topic-name', 'project-name'); $subscription = $topic->subscribe('subscription-name', ['foo' => 'bar']); $this->assertInstanceOf(Subscription::class, $subscription); }