gh-138584: Fix missing type2test in Lib/tests/list_tests.py #138590
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picnixz
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Sep 6, 2025
Misc/NEWS.d/next/Tests/2025-09-06-21-50-00.gh-issue-138584.XyZ9Ab.rst
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picnixz
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needs backport to 3.13
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…ythonGH-138590) Some common tests in `test.list_tests.CommonTest` explicitly tested `list` instead of testing the underlying list-like type defined in `type2test`. --------- (cherry picked from commit d7b9ea5) Co-authored-by: dbXD320 <[email protected]> Co-authored-by: Devansh Baghla <[email protected]>
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…ythonGH-138590) Some common tests in `test.list_tests.CommonTest` explicitly tested `list` instead of testing the underlying list-like type defined in `type2test`. --------- (cherry picked from commit d7b9ea5) Co-authored-by: dbXD320 <[email protected]> Co-authored-by: Devansh Baghla <[email protected]>
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GH-138611 is a backport of this pull request to the 3.13 branch. |
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GH-138612 is a backport of this pull request to the 3.14 branch. |
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For the sake of reducing the diff and correctly improve test coverage, I'm going to backport this. |
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@serhiy-storchaka @picnixz Thank you for the review and guidance, I really appreciate it! |
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Thank you for the fix |
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…H-138590) (#138611) gh-138584: Increase test coverage for `collections.UserList` (GH-138590) Some common tests in `test.list_tests.CommonTest` explicitly tested `list` instead of testing the underlying list-like type defined in `type2test`. --------- (cherry picked from commit d7b9ea5) Co-authored-by: dbXD320 <[email protected]> Co-authored-by: Devansh Baghla <[email protected]>
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…H-138590) (#138612) Co-authored-by: dbXD320 <[email protected]> Co-authored-by: Devansh Baghla <[email protected]>
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…ist` (pythonGH-138590) (python#138612) Co-authored-by: dbXD320 <[email protected]> Co-authored-by: Devansh Baghla <[email protected]>
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…ython#138590) Some common tests in `test.list_tests.CommonTest` explicitly tested `list` instead of testing the underlying list-like type defined in `type2test`. --------- Co-authored-by: Devansh Baghla <[email protected]>
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This PR updates three tests in Lib/test/list_tests.py (CommonTest) to consistently use self.type2test instead of directly constructing a list (or []).
test_getitem_error
test_setitem_error
test_constructor_exception_handling
Previously, these tests only applied to the builtin list, and skipped other list-like classes (such as collections.UserList) that reuse CommonTest.
By switching to self.type2test, the tests now correctly apply to all list-like types under test, ensuring consistency across the test suite.
fixes #138584