function testUpdateProperties()
{
$principalBackend = new PrincipalBackend\Mock();
$principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
$propPatch = new DAV\PropPatch(['{DAV:}yourmom' => 'test']);
$result = $principal->propPatch($propPatch);
$result = $propPatch->commit();
$this->assertTrue($result);
}
