public function testVisitNoOwnerUpdate()
{
$visitor = $this->getVisitor();
$generator = $this->getGenerator();
$generator->startDocument(null);
$values = $this->getValidValues();
unset($values['ownerId']);
$sectionCreatestruct = new RestContentMetadataUpdateStruct($values);
$visitor->visit($this->getVisitorMock(), $generator, $sectionCreatestruct);
$result = $generator->endDocument(null);
$this->assertXMLTag(array('tag' => 'Owner', 'attributes' => array('media-type' => 'application/vnd.ez.api.User+xml')), $result, 'Invalid attributes for <Owner> element.', false);
}