gh-138621: Increase test coverage for csv.DictReader and csv.Sniffer #138622
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Previously there were no tests for the DictReader fieldnames setter, the case where a StopIteration was encountered when trying to determine the fieldnames from the content or the case where Sniffer could not find a delimiter.
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Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
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I had originally skipped adding a test for the "check > 20" line because i thought that might be an implementation detail we dont want to fix down, but after seeing this, i realized this is officially documented so i think it makes sense to add a test for it. This now gets us to |
picnixz
reviewed
Sep 8, 2025
Co-authored-by: Bénédikt Tran <[email protected]>
picnixz
reviewed
Sep 8, 2025
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I think the test failure is unrelated? |
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Yes, don't worry |
gpshead
approved these changes
Sep 14, 2025
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Previously there were no tests for the DictReader fieldnames setter, the case where a StopIteration was encountered when trying to determine the fieldnames from the content or the case where Sniffer could not find a delimiter.
Previously:
After:
This is my first attempt at contributing to CPython. I read through the dev guide. The easy issues (at least the recent ones i checked) seem to all already be assigned to someone and so i want the Increase test coverage.
Currently just going through modules alphabetically to check where i can see some fairly easy targets for increasing coverage. If there are any larger or more important modules i would love to have a look at those too if you could point me to them before i get to them in alphabetical order.