public function testRemoveArg()
{
is('/app/admin/users', Url::delArg('user', '/app/admin/users?user=5'));
is('/app/admin/users?action=edit', Url::delArg('user', '/app/admin/users?action=edit&user=5'));
is('/app/admin/users?user=5', Url::delArg(array('tab', 'action'), '/app/admin/users?action=edit&tab=personal&user=5'));
}