Sokil\Mongo\CursorTest::testFilter PHP Method

    public function testFilter()
    {
        $this->collection->createDocument(array('param' => 'value1'))->save();
        $this->collection->createDocument(array('param' => 'value2'))->save();
        // test
        $result = $this->collection->find()->filter(function (Document $document) {
            return $document->param == 'value1';
        });
        $this->assertEquals('value1', current($result)->param);
    }