fix: unified logging probe before file handler attach

tests/test_unified_logging.py

@@ -0,0 +1,64 @@
+# -*- coding: utf-8 -*-
+"""统一日志：文件不可写时降级，首次 emit 不抛 PermissionError。"""
+from __future__ import annotations
+
+import logging
+import os
+import tempfile
+import unittest
+from logging.handlers import TimedRotatingFileHandler
+from unittest.mock import patch
+
+from jiangchang_skill_core import unified_logging as ul
+
+
+class TestUnifiedLogging(unittest.TestCase):
+    def setUp(self) -> None:
+        ul._skill_slug = ""
+        ul._logger_name = ""
+
+    def test_can_open_log_file_writable(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            path = os.path.join(tmp, "test.log")
+            ok, err = ul._can_open_log_file(path)
+            self.assertTrue(ok)
+            self.assertEqual(err, "")
+            self.assertTrue(os.path.isfile(path))
+
+    def test_setup_skill_logging_writable(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            log_path = os.path.join(tmp, "skill.log")
+            logger_name = "test.logger.writable"
+            with patch.object(ul, "get_skill_log_file_path", return_value=log_path):
+                ul.setup_skill_logging("receive-order", logger_name)
+                ul.get_skill_logger().info("hello")
+                self.assertTrue(os.path.isfile(log_path))
+                ul._clear_logger_handlers(logging.getLogger(logger_name))
+
+    def test_setup_skill_logging_unwritable_no_file_handler(self) -> None:
+        logger_name = "test.logger.unwritable"
+        with patch.object(ul, "_can_open_log_file", return_value=(False, "permission denied")):
+            ul.setup_skill_logging("receive-order", logger_name)
+            lg = logging.getLogger(logger_name)
+            lg.info("hello")
+        handlers = logging.getLogger(logger_name).handlers
+        self.assertFalse(any(isinstance(h, TimedRotatingFileHandler) for h in handlers))
+        self.assertTrue(any(isinstance(h, logging.NullHandler) for h in handlers))
+
+    def test_attach_unified_file_handler_unwritable(self) -> None:
+        logger_name = "test.logger.attach.unwritable"
+        with patch.object(ul, "_can_open_log_file", return_value=(False, "permission denied")):
+            lg = ul.attach_unified_file_handler(
+                "/no/access/test.log",
+                skill_slug="receive-order",
+                logger_name=logger_name,
+            )
+            lg.info("hello")
+        self.assertFalse(
+            any(isinstance(h, logging.FileHandler) for h in lg.handlers)
+        )
+        self.assertTrue(any(isinstance(h, logging.NullHandler) for h in lg.handlers))
+
+
+if __name__ == "__main__":
+    unittest.main()