public function testUpdateCustomFields()
 {
     $sims = array('234234', '23411');
     $cf = array('customField1' => 'custom field 1', 'customField2' => 'custom field 2', 'customField3' => 'custom field 3', 'customField4' => 'custom field 4');
     $customFields = new \Application\Model\Sim\CustomFieldsModel($cf);
     $response = $this->simMapper->updateCustomFields($customFields, $sims);
     $this->assertNotNull($response);
 }