def test_fill_pip_modules_with_freeze(self):
        provenance = Provenance()

        self.assertEqual(None, provenance.pip_freeze)
        provenance.fill_pip_modules()
        self.assertNotEqual({}, provenance.pip_freeze)
    def test_fill_pip_modules_module_versions(self):
        provenance = Provenance()

        self.assertEqual({}, provenance.module_versions)
        provenance.fill_pip_modules()
        self.assertNotEqual({}, provenance.module_versions)