Snippet for "Why Refactoring? How to Refactor/Restructure Python Package?" https://hackernoon.com/why-refactoring-how-to-restructure-python-package-51b89aa91987

tests_backward_compatible.py

"""
in tests.py
Simple backward compatibility test case
"""
class ConfigHelperCompatibilityTestCase(unittest.TestCase):
    def test_backward_compatibility(self):
        try:
            from .config import CONFIG_NAME, LOGGING_LEVEL
            from .config import get_logging_level
            from .config import ConfigHelper
        except ImportError as e:
            self.fail(e.message)