Modify test and utils.py to fix flaky test #203
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pv8
reviewed
Jan 17, 2023
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| def get_ip(): | ||
| def get_ip(httpbin_url): |
Owner
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Since this method is being used in other parts of the code (I need to improve the tests in general 😞), what about attributing a default value to the new function parameter?
Suggested change
| def get_ip(httpbin_url): | |
| def get_ip(req_ip_url=HTTPBIN_URL): |
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| def test_get_ip(self): | ||
| ip = utils.get_ip() | ||
| ip = utils.get_ip('https://httpbin.org/ip') |
Owner
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Please, take a look at the above comment.
Suggested change
| ip = utils.get_ip('https://httpbin.org/ip') | |
| ip = utils.get_ip() |
| utils.HTTPBIN_URL = 'http://example.nothing' | ||
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| ip = utils.get_ip() | ||
| ip = utils.get_ip('http://example.nothing') |
Owner
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Please, take a look at the above comment.
Suggested change
| ip = utils.get_ip('http://example.nothing') | |
| ip = utils.get_ip(req_ip_url='http://example.nothing') |
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The test
test_get_ip()under theSanityTestclass insidetest_noipy.pywas found to be flaky, i.e. a test that both passes and fail despite no changes to the code or the tests itself.Using the pytest-flakefinder plugin, when the test was re-run more than once, it was failing. Upon looking at the code, the reason was because the the value of
HTTPBIN_URLinsideutils.pywas not being set back to its default value ofhttps://httpbin.org/ipTo fix it, I just changed the
test_get_ip()test and have it be provided with the HTTPBIN_URL value instead of the value being read from the global variable.To reproduce flakiness:
pytest --flake-finder test/test_noipy.py::SanityTest::test_get_ipAfter implementing the fix, all tests pass successfully, both with and without the pytest-flakefinder plugin being used.
In general, flaky tests are a pain to fix with regards to locating the root of the actual problem, so it's a good idea to fix them when you detect them. I'm aware that the tests might not be re-run at all, but this change makes the entire module more robust and future-proof so it's just a small fix for you to consider.