FOF30\Model\DataModel\Collection::contains PHP Метод

    public function contains($key)
    {
        return !is_null($this->find($key));
    }

 /**
  * @group           DataModel
  * @group           CollectionContains
  * @covers          FOF30\Model\DataModel\Collection::contains
  * @dataProvider    CollectionDataprovider::getTestContains
  */
 public function testContains($test, $check)
 {
     $msg = 'Collection::contains %s - Case: ' . $check['case'];
     $items = $this->buildCollection();
     $collection = new Collection($items);
     $result = $collection->contains($test['key']);
     $this->assertEquals($check['result'], $result, sprintf($msg, 'Failed to return the correct value'));
 }