public function testCreateContentTypeGroup()
{
$body = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<ContentTypeGroupInput>
<identifier>testCreateContentTypeGroup</identifier>
</ContentTypeGroupInput>
XML;
$request = $this->createHttpRequest('POST', '/api/ezp/v2/content/typegroups', 'ContentTypeGroupInput+xml', 'ContentTypeGroup+json');
$request->setContent($body);
$response = $this->sendHttpRequest($request);
self::assertHttpResponseCodeEquals($response, 201);
self::assertHttpResponseHasHeader($response, 'Location');
$href = $response->getHeader('Location');
$this->addCreatedElement($href);
return $href;
}