In the Mocking External Resources recipe in Chapter 9, Testing, we looked at ways to mock external resources so that we could write a unit test that wouldn't accidentally delete files. A test for the code in this recipe needs to mock the filesystem resources by mocking the Path class. Here's how the unit test would look, starting with a high-level outline of the test class:
import unittest
from unittest.mock import *
class GIVEN_get_config_WHEN_load_THEN_overrides(unittest.TestCase):
def setUp(self):
def runTest(self):
This provides a boilerplate structure for a unit test. Mocking a Path becomes rather complex because of the number of distinct objects involved. Here's a summary of what kinds of object creations occur:
