Account for stdlib back compatibility in test_manifest

setuptools/tests/test_manifest.py

@@ -322,20 +322,35 @@ class TestFileListTest(TempDirTestCase):
     to ensure setuptools' version of FileList keeps parity with distutils.
     """
 
-    def get_logs(self, caplog, *levels):
-        return [
-            record.getMessage()
-            for record in caplog.records
-            if record.levelno in levels
-        ]
+    @pytest.fixture(autouse=True)
+    def _compat_record_logs(self, monkeypatch):
+        """Account for stdlib compatibility"""
+        self.logs = []
+        if (
+            os.getenv("SETUPTOOLS_USE_DISTUTILS") == "stdlib"
+            and hasattr(log, 'Log')
+        ):
+            def _log(_logger, level, msg, args):
+                exc = sys.exc_info()
+                rec = logging.LogRecord('distutils', level, '', 0, msg, args, exc)
+                self.logs.append(rec)
+
+            monkeypatch.setattr(log.Log, '_log', _log)
+
+    def get_records(self, caplog, *levels):
+        return [r for r in (caplog.records + self.logs) if r.levelno in levels]
+
+    def clear_logs(self, caplog):
+        caplog.clear()
+        self.logs = []
 
     def assertNoWarnings(self, caplog):
-        assert self.get_logs(caplog, log.WARN) == []
-        caplog.clear()
+        assert self.get_records(caplog, log.WARN) == []
+        self.clear_logs(caplog)
 
     def assertWarnings(self, caplog):
-        assert len(self.get_logs(caplog, log.WARN)) > 0
-        caplog.clear()
+        assert len(self.get_records(caplog, log.WARN)) > 0
+        self.clear_logs(caplog)
 
     def make_files(self, files):
         for file in files: