public function testFilterByNumChildren()
 {
     $this->list->filterByNumberOfChildren(2, '>=');
     $results = $this->list->getResults();
     $this->assertEquals(1, count($results));
     $this->assertEquals(1, $results[0]->getCollectionID());
     $subject = Page::getByPath('/test-page-2');
     $parent = Page::getByPath('/holy-mackerel');
     $subject->addCollectionAlias($parent);
     $nl = new \Concrete\Core\Page\PageList();
     $nl->ignorePermissions();
     $nl->includeAliases();
     $nl->filterByNumberOfChildren(1, '>=');
     $results = $nl->getTotalResults();
     $this->assertEquals(6, $results);
 }