public function testVisit()
{
$visitor = $this->getVisitor();
$generator = $this->getGenerator();
$generator->startDocument(null);
$contentTypeGroupUpdateStruct = new ContentType\ContentTypeGroupUpdateStruct();
$contentTypeGroupUpdateStruct->identifier = 'some-group';
$contentTypeGroupUpdateStruct->modificationDate = new \DateTime('2013-02-22 14:14 Europe/Zagreb');
$contentTypeGroupUpdateStruct->modifierId = '/user/users/14';
$visitor->visit($this->getVisitorMock(), $generator, $contentTypeGroupUpdateStruct);
$result = $generator->endDocument(null);
$this->assertNotNull($result);
return $result;
}