How to use the persistence.persistence_managers.CouchDbConnector function in Persistence

def test_get_by_parent_and_type(self):
        couchConnector = CouchDbConnector(self.db)
        doc = {
            '_id': '123',
            'type': 'father',
            'parent': None,
        }
        couchConnector.saveDocument(doc)

        doc = {
            '_id': '456',
            'type': 'child',
            'parent': '123',
        }
        couchConnector.saveDocument(doc)

        doc = {
            '_id': '789',

def test_save_Document(self):
        couchConnector = CouchDbConnector(self.db)
        doc = {
            '_id': '123',
            'data': 'some data'
        }
        couchConnector.saveDocument(doc)

        doc_from_db = self.db.get('123')

        self.assertNotEquals(
            doc_from_db,
            None,
            "Document should be retrieved")

        self.assertEquals(
            doc_from_db.get('data'),
            'some data',

def test_get_Document(self):
        couchConnector = CouchDbConnector(self.db)
        doc = {
            '_id': '123',
            'data': 'some data'
        }
        couchConnector.saveDocument(doc)

        doc_retrieved = couchConnector.getDocument('123')

        self.assertNotEquals(
            doc_retrieved,
            None,
            "Document should be retrieved")

        self.assertEquals(
            doc_retrieved.get('data'),
            'some data',

def test_remove_Document(self):
        couchConnector = CouchDbConnector(self.db)
        doc = {
            '_id': '123',
            'data': 'some data'
        }
        couchConnector.saveDocument(doc)

        couchConnector.remove('123')

        try:
            doc_from_db = self.db.get('123')
        except ResourceNotFound:
            doc_from_db = None

        self.assertEquals(
            doc_from_db,
            None,

def __init__(self, db, seq_num=0):
        super(CouchDbConnector, self).__init__(type=DBTYPE.COUCHDB)
        self.db = db
        self.saves_counter = 0
        self.mutex = threading.Lock()
        self._docs = {}
        try:
            vmanager = ViewsManager()
            vmanager.addViews(self.db)
            self._compactDatabase()
        except restkit.Unauthorized:
            getLogger(self).warn(
                "You're not authorized to upload views to this database")
        self.seq_num = self.db.info()['update_seq']

def _loadDb(self, dbname):
        db = self.__serv.get_db(dbname)
        seq = db.info()['update_seq']
        self.dbs[dbname] = CouchDbConnector(db, seq_num=seq)
        return self.dbs[dbname]

def _create(self, name):
        db = self.__serv.create_db(name.lower())
        return CouchDbConnector(db)