public function testTrim()
{
$filter = new Filter\Trim();
$this->filterTest($filter, ' test ', 'test');
$this->filterTest($filter, [' test1', ' test2 '], ['test1', 'test2']);
// Tests multidimensional array filtering
$this->filterTest($filter, [[' ', ' ', [' ']], ' '], []);
$this->filterArrayTest($filter);
}