gh-60283: Check for redefined test names in CI

.github/CODEOWNERS

@@ -9,6 +9,7 @@
 
 # pre-commit
 .pre-commit-config.yaml @hugovk @AlexWaygood
+.ruff.toml @hugovk @AlexWaygood
 
 # Build system
 configure* @erlend-aasland @corona10

.github/workflows/build.yml

@@ -63,7 +63,7 @@ jobs:
  # into the PR branch anyway.
  #
  # https://github.com/python/core-workflow/issues/373
- git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qvE '(\.rst$|^Doc|^Misc)' && echo "run_tests=true" >> $GITHUB_OUTPUT || true
+ git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qvE '(\.rst$|^Doc|^Misc|^\.pre-commit-config\.yaml$|\.ruff\.toml$)' && echo "run_tests=true" >> $GITHUB_OUTPUT || true
  fi
 
  # Check if we should run hypothesis tests

.github/workflows/lint.yml

@@ -5,6 +5,10 @@ on: [push, pull_request, workflow_dispatch]
 permissions:
  contents: read
 
+env:
+ FORCE_COLOR: 1
+ RUFF_FORMAT: github
+
 concurrency:
  group: ${{github.workflow }}-${{github.head_ref || github.run_id }}
  cancel-in-progress: true

.pre-commit-config.yaml

@@ -1,7 +1,17 @@
 repos:
+ - repo: https://github.com/astral-sh/ruff-pre-commit
+ rev: v0.0.288
+ hooks:
+ - id: ruff
+ name: Run Ruff on Lib/test/
+ args: [--exit-non-zero-on-fix]
+ files: ^Lib/test/
+
  - repo: https://github.com/pre-commit/pre-commit-hooks
  rev: v4.4.0
  hooks:
+ - id: check-toml
+ exclude: ^Lib/test/test_tomllib/
  - id: check-yaml
  - id: end-of-file-fixer
  types: [python]

Lib/test/.ruff.toml

@@ -0,0 +1,35 @@
+fix = true
+select = [
+ "F811", # Redefinition of unused variable (useful for finding test methods with the same name)
+]
+extend-exclude = [
+ # Failed to lint
+ "badsyntax_pep3120.py",
+ "encoded_modules/module_iso_8859_1.py",
+ "encoded_modules/module_koi8_r.py",
+ # Failed to parse
+ "badsyntax_3131.py",
+ "support/socket_helper.py",
+ "test_fstring.py",
+ # TODO Fix: F811 Redefinition of unused name
+ "test__opcode.py",
+ "test_buffer.py",
+ "test_ctypes/test_arrays.py",
+ "test_ctypes/test_functions.py",
+ "test_dataclasses/__init__.py",
+ "test_descr.py",
+ "test_enum.py",
+ "test_functools.py",
+ "test_genericclass.py",
+ "test_grammar.py",
+ "test_import/__init__.py",
+ "test_keywordonlyarg.py",
+ "test_pkg.py",
+ "test_subclassinit.py",
+ "test_typing.py",
+ "test_unittest/testmock/testpatch.py",
+ "test_yield_from.py",
+ "time_hashlib.py",
+ # Pending https://github.com/python/cpython/pull/109139
+ "test_monitoring.py",
+]