gh-60283: Check for redefined test names in CI

.pre-commit-config.yaml

@@ -1,4 +1,11 @@
 repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.0.287
+    hooks:
+      - id: ruff
+        args: [--exit-non-zero-on-fix]
+        files: ^Lib/test/
+
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.4.0
     hooks:

Lib/test/.ruff.toml

@@ -0,0 +1,38 @@
+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
+    "mod_generics_cache.py",
+    "badsyntax_3131.py",
+    "support/socket_helper.py",
+    "test_builtin.py",
+    "test_fstring.py",
+    "test_funcattrs.py",
+    "test_functools.py",
+    "test_type_aliases.py",
+    "test_type_params.py",
+    "test_typing.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_genericclass.py",
+    "test_grammar.py",
+    "test_import/__init__.py",
+    "test_keywordonlyarg.py",
+    "test_pkg.py",
+    "test_subclassinit.py",
+    "test_unittest/testmock/testpatch.py",
+    "test_yield_from.py",
+    "time_hashlib.py",
+]