protected function _testGettingImapId()
{
$collections = $this->getCollectionHandler();
$this->assertEquals('INBOX', $collections->getBackendIdForFolderUid('519422f1-4c5c-4547-946a-1701c0a8015f'));
$this->assertEquals('@Contacts@', $collections->getBackendIdForFolderUid('@Contacts@'));
}