因為 import 問題而無法殺死突變

針對使用不同名稱載入模組會讓突變存活下來的範例。在這個案例中，問題跟 Cosmic-Ray 如何載入突變模組有關。這已經在 PR #158 中修復。

Reproducer

$ pip install https://github.com/sixty-north/cosmic-ray/zipball/2a48656
$ celery -A cosmic_ray.tasks.worker worker

$ cosmic-ray run --baseline=10 example.json sandwich/ham/ham.py -- tests
$ cosmic-ray report example.json
job ID 1:Outcome.SURVIVED:sandwich.ham.ham
command: cosmic-ray worker sandwich.ham.ham number_replacer 0 unittest -- tests
--- mutation diff ---
--- a/sandwich/ham/ham.py
+++ b/sandwich/ham/ham.py
@@ -3,6 +3,6 @@

 class Ham(object):

-    def __init__(self, pieces=10):
+    def __init__(self, pieces=11):
         self.pieces = pieces


total jobs: 1
complete: 1 (100.00%)
survival rate: 100.00%

備註

在這個範例中 test_control.py 在修復後便能正確殺死突變。

程式碼

sandwich/ham/ham.py

class Ham(object):
    def __init__(self, pieces=10):
        self.pieces = pieces

sandwich/control.py

from sandwich.ham import ham
ham_class = ham.Ham

tests/test_control.py

import sandwich.control
import unittest

class TestControl(unittest.TestCase):
    def test_loading_via_importlib(self):
        ham_in_fridge = sandwich.control.ham_class()
        self.assertEqual(ham_in_fridge.pieces, 10)


if __name__ == "__main__":
    unittest.main()