[issue41322] unittest: Generator test methods will always be marked as passed
Karthikeyan Singaravelan
report at bugs.python.org
Fri Jul 17 06:17:58 EDT 2020
Karthikeyan Singaravelan <tir.karthi at gmail.com> added the comment:
https://github.com/python/cpython/blob/8e836bb21ce73f0794fd769db5883c29680dfe47/Lib/unittest/case.py#L548 . _callTestMethod just calls the test method and doesn't check for the method to be a generator function to be iterated through. In Python 3.8 the call to test method was separated out as _callTestMethod. So something like below added in the original method should work. I guess there is an existing issue for this.
import unittest
from unittest import TestCase
class BuggyTestCase(TestCase):
def _callTestMethod(self, method):
import inspect
if inspect.isgeneratorfunction(method):
list(method())
else:
method()
def test_generator(self):
self.assertTrue(False)
yield None
if __name__ == "__main__":
unittest.main()
python3.8 test_foo.py
F
======================================================================
FAIL: test_generator (__main__.BuggyTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "test_foo.py", line 10, in _callTestMethod
list(method())
File "test_foo.py", line 15, in test_generator
self.assertTrue(False)
AssertionError: False is not true
----------------------------------------------------------------------
Ran 1 test in 0.000s
FAILED (failures=1)
----------
nosy: +ezio.melotti, michael.foord, rbcollins, xtreak
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<https://bugs.python.org/issue41322>
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