Fix test_emit_open_error on Windows

Split the WatchedFileHandler case into a separate test skipped on
Windows, where open log files are locked and the directory holding
them cannot be removed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: serhiy-storchaka

Lib/test/test_logging.py

@@ -6416,37 +6416,45 @@ def test_emit_after_closing_in_write_mode(self):
         with open(self.fn) as fp:
             self.assertEqual(fp.read().strip(), '1')
 
-    def test_emit_open_error(self):
+    def _check_open_error(self, h):
         # gh-135683: an error while opening the file in emit() respects
         # raiseExceptions, like an error during the actual write.
-        d = tempfile.mkdtemp()
-        self.addCleanup(os_helper.rmtree, d)
         r = logging.makeLogRecord({})
         old_raise = logging.raiseExceptions
         self.addCleanup(setattr, logging, 'raiseExceptions', old_raise)
 
+        logging.raiseExceptions = True
+        with support.captured_stderr() as stderr:
+            h.handle(r)
+        self.assertIn('\nFileNotFoundError:', stderr.getvalue())
+
+        logging.raiseExceptions = False
+        with support.captured_stderr() as stderr:
+            h.handle(r)
+        self.assertEqual('', stderr.getvalue())
+
+    def test_emit_open_error(self):
         # FileHandler with delay: the failing open happens in emit().
-        fh = logging.FileHandler(os.path.join(d, 'missing', 'a.log'),
-                                 encoding='utf-8', delay=True)
-        self.addCleanup(fh.close)
+        d = tempfile.mkdtemp()
+        self.addCleanup(os_helper.rmtree, d)
+        h = logging.FileHandler(os.path.join(d, 'missing', 'a.log'),
+                                encoding='utf-8', delay=True)
+        self.addCleanup(h.close)
+        self._check_open_error(h)
+
+    @unittest.skipIf(os.name == 'nt',
+                     'WatchedFileHandler not appropriate for Windows.')
+    def test_emit_reopen_error(self):
         # WatchedFileHandler: reopenIfNeeded() fails after the dir is removed.
+        d = tempfile.mkdtemp()
+        self.addCleanup(os_helper.rmtree, d)
         subdir = os.path.join(d, 'sub')
         os.mkdir(subdir)
-        wfh = logging.handlers.WatchedFileHandler(
+        h = logging.handlers.WatchedFileHandler(
             os.path.join(subdir, 'b.log'), encoding='utf-8')
-        self.addCleanup(wfh.close)
+        self.addCleanup(h.close)
         os_helper.rmtree(subdir)
-
-        for h in (fh, wfh):
-            logging.raiseExceptions = True
-            with support.captured_stderr() as stderr:
-                h.handle(r)
-                self.assertIn('\nFileNotFoundError:', stderr.getvalue())
-
-            logging.raiseExceptions = False
-            with support.captured_stderr() as stderr:
-                h.handle(r)
-                self.assertEqual('', stderr.getvalue())
+        self._check_open_error(h)
 
 class RotatingFileHandlerTest(BaseFileTest):
     def test_should_not_rollover(self):