def test_list_file_history(self): storage = RecipeStorage(TEST_DIRECTORY); recipe = Recipe('MustikkaPiirakka.md', MARKDOWN) storage.save(recipe) storage.backup_recipe(recipe) time.sleep(1) storage.backup_recipe(recipe) recipe=storage.load('MustikkaPiirakka.md') recipes=storage.history(recipe) self.assertEqual(len(recipes),2)