Mercurial > cpython-lru_cache-weakref
diff Lib/test/test_logging.py @ 49955:878d40468c4e legacy-trunk
Issue #4384: Added logging integration with warnings module using captureWarnings(). This change includes a NullHandler which does nothing; it will be of use to library developers who want to avoid the "No handlers could be found for logger XXX" message which can appear if the library user doesn't configure logging.
| author | Vinay Sajip <vinay_sajip@yahoo.co.uk> |
|---|---|
| date | Wed, 03 Dec 2008 23:22:58 +0000 |
| parents | 36b2d674fc8c |
| children | e49013f1d831 |
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--- a/Lib/test/test_logging.py Wed Dec 03 15:42:10 2008 +0000 +++ b/Lib/test/test_logging.py Wed Dec 03 23:22:58 2008 +0000 @@ -18,7 +18,7 @@ """Test harness for the logging module. Run all tests. -Copyright (C) 2001-2002 Vinay Sajip. All Rights Reserved. +Copyright (C) 2001-2008 Vinay Sajip. All Rights Reserved. """ import logging @@ -44,6 +44,7 @@ import time import types import unittest +import warnings import weakref @@ -885,6 +886,32 @@ if os.path.isfile(fn): os.remove(fn) +class WarningsTest(BaseTest): + def test_warnings(self): + logging.captureWarnings(True) + warnings.filterwarnings("always", category=UserWarning) + try: + file = cStringIO.StringIO() + h = logging.StreamHandler(file) + logger = logging.getLogger("py.warnings") + logger.addHandler(h) + warnings.warn("I'm warning you...") + logger.removeHandler(h) + s = file.getvalue() + h.close() + self.assertTrue(s.find("UserWarning: I'm warning you...\n") > 0) + + #See if an explicit file uses the original implementation + file = cStringIO.StringIO() + warnings.showwarning("Explicit", UserWarning, "dummy.py", 42, file, + "Dummy line") + s = file.getvalue() + file.close() + self.assertEqual(s, "dummy.py:42: UserWarning: Explicit\n Dummy line\n") + finally: + warnings.resetwarnings() + logging.captureWarnings(False) + # Set the locale to the platform-dependent default. I have no idea # why the test does this, but in any case we save the current locale # first and restore it at the end. @@ -893,7 +920,7 @@ run_unittest(BuiltinLevelsTest, BasicFilterTest, CustomLevelsAndFiltersTest, MemoryHandlerTest, ConfigFileTest, SocketHandlerTest, MemoryTest, - EncodingTest) + EncodingTest, WarningsTest) if __name__ == "__main__": test_main()