public function testUpdateUserGroup($groupHref)
{
$text = $this->addTestSuffix(__FUNCTION__);
$xml = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<UserGroupUpdate>
<fields>
<field>
<fieldDefinitionIdentifier>description</fieldDefinitionIdentifier>
<languageCode>eng-GB</languageCode>
<fieldValue>{$text}</fieldValue>
</field>
</fields>
</UserGroupUpdate>
XML;
$request = $this->createHttpRequest('PATCH', $groupHref, 'UserGroupUpdate+xml', 'UserGroup+json');
$request->setContent($xml);
$response = $this->sendHttpRequest($request);
self::assertHttpResponseCodeEquals($response, 200);
}