[issue17944] Refactor test_zipfile

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Yes, the first patch includes only this change (plus some needed regrouping and renaming). The second patch in additional wraps long lines, uses asserts with better error reporting, has better resource management ("with" operator and addCleanup), and contains other minor changes (see a difference between two patches).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17944>
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