def test_b(self):
     """Test a single configuration is retrieved."""
     config = self.db.ConfigurationToValidate()
     config.save()
     retriever = ConfigurationsRetriever()
     retriever.db = self.db
     self.assertEqual([config], retriever.retrieve_configurations())
    def test_a(self):
        """Test no configurations are retrieved.

        There are no configurations to validate.

        """
        retriever = ConfigurationsRetriever()
        retriever.db = self.db
        self.assertEqual([], retriever.retrieve_configurations())