Google\Cloud\Tests\PubSub\PubSubClientTest::testUsesGrpcConnectionByDefault PHP Method

    public function testUsesGrpcConnectionByDefault()
    {
        if (!extension_loaded('grpc')) {
            $this->markTestSkipped('Must have the grpc extension installed to run this test.');
        }
        $client = new PubSubClientStub(['projectId' => 'project']);
        $this->assertInstanceOf(Grpc::class, $client->getConnection());
    }