def test_previous_managed_ids_returns_empty_list_for_missing_user(self):
    data = {
      "1337": []
    }
    with open(self.temppath, "w+") as f:
      f.write(json.dumps(data))
    archive = ManagedROMArchive(self.temppath)

    self.assertEquals(archive.previous_managed_ids(self.mock_user), [])