/**
* Test id.
*
* @param Operation $operation
* The operation to perform tests on.
*
* @dataProvider operationDataProvider
*/
public function testIdx(Operation $operation)
{
$connection = new Connection();
$operation->setIdx($connection, 'testid');
$check = $operation->idx($connection);
$this->assertSame('testid', $check, 'Correct id was not set.');
}