convert internal test warnings into logger calls

Author: graingert

Lib/test/support/__init__.py

@@ -17,6 +17,7 @@
 import types
 import unittest
 import warnings
+import logging
 
 
 __all__ = [
@@ -387,7 +388,7 @@ def skip_if_buildbot(reason=None):
     try:
         isbuildbot = getpass.getuser().lower() == 'buildbot'
     except (KeyError, OSError) as err:
-        warnings.warn(f'getpass.getuser() failed {err}.', RuntimeWarning)
+        logging.getLogger(__name__).warning('getpass.getuser() failed %s.', err, exc_info=err)
         isbuildbot = False
     return unittest.skipIf(isbuildbot, reason)
 
@@ -1066,8 +1067,7 @@ def start(self):
         try:
             f = open(self.procfile, 'r')
         except OSError as e:
-            warnings.warn('/proc not available for stats: {}'.format(e),
-                          RuntimeWarning)
+            logging.getLogger(__name__).warning('/proc not available for stats: %s', e, exc_info=e)
             sys.stderr.flush()
             return
 

Lib/test/support/os_helper.py

@@ -1,3 +1,4 @@
+import logging
 import collections.abc
 import contextlib
 import errno
@@ -378,8 +379,7 @@ def _waitfor(func, pathname, waitall=False):
             # Increase the timeout and try again
             time.sleep(timeout)
             timeout *= 2
-        warnings.warn('tests may fail, delete still pending for ' + pathname,
-                      RuntimeWarning, stacklevel=4)
+        logging.getLogger(__name__).warning('tests may fail, delete still pending for %s', pathname)
 
     def _unlink(filename):
         _waitfor(os.unlink, filename)
@@ -494,9 +494,12 @@ def temp_dir(path=None, quiet=False):
         except OSError as exc:
             if not quiet:
                 raise
-            warnings.warn(f'tests may fail, unable to create '
-                          f'temporary directory {path!r}: {exc}',
-                          RuntimeWarning, stacklevel=3)
+            logger.getLogger(__name__).warning(
+                "tests may fail, unable to create temporary directory %r: %s",
+                path,
+                exc,
+                exc_info=exc,
+            )
     if dir_created:
         pid = os.getpid()
     try:
@@ -527,9 +530,13 @@ def change_cwd(path, quiet=False):
     except OSError as exc:
         if not quiet:
             raise
-        warnings.warn(f'tests may fail, unable to change the current working '
-                      f'directory to {path!r}: {exc}',
-                      RuntimeWarning, stacklevel=3)
+        logging.getLogger(__name__).warning(
+            'tests may fail, unable to change the current working directory '
+            'to %r: %s',
+            path,
+            exc,
+            exc_info=exc,
+        )
     try:
         yield os.getcwd()
     finally:

Lib/test/test_decimal.py

@@ -23,7 +23,7 @@
 you're working through IDLE, you can import this test module and call test()
 with the corresponding argument.
 """
-
+import logging
 import math
 import os, sys
 import operator
@@ -5946,8 +5946,9 @@ def tearDownModule():
     if C: C.setcontext(ORIGINAL_CONTEXT[C].copy())
     P.setcontext(ORIGINAL_CONTEXT[P].copy())
     if not C:
-        warnings.warn('C tests skipped: no module named _decimal.',
-                      UserWarning)
+        logging.getLogger(__name__).warning(
+            'C tests skipped: no module named _decimal.'
+        )
     if not orig_sys_decimal is sys.modules['decimal']:
         raise TestFailed("Internal error: unbalanced number of changes to "
                          "sys.modules['decimal'].")

Lib/test/test_hashlib.py

@@ -4,6 +4,7 @@
 #  Licensed to PSF under a Contributor Agreement.
 #
 
+import logging
 import array
 from binascii import unhexlify
 import hashlib
@@ -113,7 +114,11 @@ def _conditional_import_module(self, module_name):
             return importlib.import_module(module_name)
         except ModuleNotFoundError as error:
             if self._warn_on_extension_import and module_name in builtin_hashes:
-                warnings.warn(f'Did a C extension fail to compile? {error}')
+                logging.getLogger(__name__).warning(
+                    'Did a C extension fail to compile? %s',
+                    error,
+                    exc_info=error,
+                )
         return None
 
     def __init__(self, *args, **kwargs):

Lib/test/test_interpreters/utils.py

@@ -1,3 +1,4 @@
+import logging
 from collections import namedtuple
 import contextlib
 import json
@@ -66,8 +67,8 @@ def pack_exception(exc=None):
 def unpack_exception(packed):
     try:
         data = json.loads(packed)
-    except json.decoder.JSONDecodeError:
-        warnings.warn('incomplete exception data', RuntimeWarning)
+    except json.decoder.JSONDecodeError as e:
+        logging.getLogger(__name__).warning('incomplete exception data', exc_info=e)
         print(packed if isinstance(packed, str) else packed.decode('utf-8'))
         return None
     exc = types.SimpleNamespace(**data)

Lib/test/test_pty.py

@@ -135,8 +135,10 @@ def test_openpty(self):
                 new_dim = tty.tcgetwinsize(pty.STDIN_FILENO)
                 self.assertEqual(new_dim, target_dim,
                                  "pty.STDIN_FILENO window size unchanged")
-            except OSError:
-                warnings.warn("Failed to set pty.STDIN_FILENO window size.")
+            except OSError as e:
+                logging.getLogger(__name__).warning(
+                    "Failed to set pty.STDIN_FILENO window size.", exc_info=e,
+                )
                 pass
 
         try: