• Run pyupgrade --py37-plus
• In DummyCommand, simplify setting of kwargs.
• Implement TempdirManager setup and teardown as a pytest fixture.
• Implement LoggingSilencer setup and teardown as a pytest fixture. Required building a fixture combiner.
• Ran unittest2pytest
• ⚫ Fade to black.
• 👹 Feed the hobgoblins (delint).
• Convert many tests to pytest native
• Remove compatibility shims for Setuptools.
• Replace save/restore of argv and cwd as pytest fixtures.
• Move setup/teardown from BuildExtTestCase into a fixture.
• Add tests capturing failure. Ref Regression in UnixCCompiler.find_library_file distutils#164.
• Use itertools.product to compute the product of two generators. Fixes Regression in UnixCCompiler.find_library_file distutils#164.
• Extract 'roots' variable.
• Add test compatibility on Windows.

Summary of changes

Closes

Pull Request Checklist

• Changes have tests
• News fragment added in changelog.d/.
  (See documentation for details)