Sokil\Mongo\CollectionTest::testFind PHP Method

    public function testFind()
    {
        $d1 = $this->collection->createDocument(array('param' => 1))->save();
        $d2 = $this->collection->createDocument(array('param' => 2))->save();
        $d3 = $this->collection->createDocument(array('param' => 3))->save();
        $d4 = $this->collection->createDocument(array('param' => 4))->save();
        $queryBuilder = $this->collection->find(function (\Sokil\Mongo\Expression $expression) {
            $expression->where('param', 3);
        });
        $this->assertEquals($d3->getId(), $queryBuilder->findOne()->getId());
    }