protected function getNodeTypeManager()
{
$factory = new Factory();
$dom = new \DOMDocument();
$dom->load(__DIR__ . '/../fixtures/nodetypes.xml');
$converter = new NodeTypeXmlConverter($factory);
$om = $this->getObjectManagerMock();
$om->expects($this->any())->method('getNodeTypes')->will($this->returnValue($converter->getNodeTypesFromXml($dom)));
return new NodeTypeManager($factory, $om);
}