Move Buffered tests from test_io to test_bufio

[cmaloney]

Feature or enhancement

Proposal:

test_io is currently over 5000 lines long and tests a range of behaviors of lots of distinct io components. Some work to make it more modular has happened over time and there are a number of tests for specific subsets of io behavior (see: https://github.com/python/cpython/blob/main/Lib/test/test_io.py#L3-L13), including one for Buffered I/O (test_bufio.py, 74 lines currently)

About 1200 lines of test_io are Buffered I/O specific tests which are well isolated / can be moved relatively easily (BufferedReaderTest, BufferedWriterTest, BufferedRWPairTest, and BufferedRandomTest as well as their Py*/C* variants). I'd like to move them from test_io to test_bufio to make it simpler/faster to iterate / test / validate Buffered I/O behavior.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-138013: Move test.test_io to be a module #138153
• gh-138013: Move I/O tests to test_io #138365
• gh-138013: Remove test_io load_tests namespace manipulation #138366
• gh-138013: Move I/O test infrastructre to test_io.utils #138475
• gh-138013: Remove load_tests in test_io.test_general #138771
• gh-138013: Split SignalsTest from test_io.test_general #139079
• gh-138013: Split TextIO tests from test_io.test_general #139173
• gh-138013: Split BufferedIO tests from test_io.test_general #139454

[Aniketsy]

Hi @cmaloney
Before I start working on moving the Buffered I/O-specific tests from test_io.py to test_bufio.py, I just wanted to check in and confirm if it’s okay to proceed. I’d also appreciate any guidance or considerations you’d like me to keep in mind while making this change.

Thank you!

[cmaloney]

@Aniketsy planning to work on this myself, are some special pieces in load_tests which need to be refactored as part of this.

[Aniketsy]

@cmaloney Thank you for clarifying, I appreciate it!