'Tests trying to delete an empty cell.'

def test_delete_cell_success(self):

    cell_uuid = uuidutils.generate_uuid()
    ctxt = context.get_admin_context()
    cm = objects.CellMapping(context=ctxt, uuid=cell_uuid, database_connection='fake:///db', transport_url='fake:///mq')
    cm.create()
    self.assertEqual(0, self.commands.delete_cell(cell_uuid))
    output = self.output.getvalue().strip()
    self.assertEqual('', output)
