public function testCallingDefinedMethodShouldExecuteOnEachItemOfNodelist()
{
$a = array('foo', 'bar');
$nl = new NodeList($a);
$closure = function ($v, $k, $l) {
$l[$k] = strtoupper($v);
};
$nl->addMethod('ucase', $closure);
$nl->ucase();
foreach ($nl as $k => $v) {
$this->assertEquals(strtoupper($a[$k]), $v);
}
}
