public function identifierFilterIsSupported($filter, array $expectedNodePaths)
{
$q = new FlowQuery(array($this->node));
$foundNodes = $q->find($filter)->get();
$foundNodePaths = array_map(function (NodeInterface $node) {
return $node->getPath();
}, $foundNodes);
$this->assertSame($expectedNodePaths, $foundNodePaths);
}