public function testUpdatePolicy($policyHref)
{
$xml = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<PolicyUpdate>
<limitations>
<limitation identifier="Class">
<values>
<ref href="1"/>
</values>
</limitation>
</limitations>
</PolicyUpdate>
XML;
$request = $this->createHttpRequest('PATCH', $policyHref, 'PolicyUpdate+xml', 'Policy+json');
$request->setContent($xml);
$response = $this->sendHttpRequest($request);
self::assertHttpResponseCodeEquals($response, 200);
}