| # Copyright 2018 gRPC authors. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| """Test of gRPC Python's interaction with the python logging module""" |
| |
| import unittest |
| import six |
| from six.moves import reload_module |
| import logging |
| import grpc |
| import functools |
| import sys |
| |
| |
| def patch_stderr(f): |
| |
| @functools.wraps(f) |
| def _impl(*args, **kwargs): |
| old_stderr = sys.stderr |
| sys.stderr = six.StringIO() |
| try: |
| f(*args, **kwargs) |
| finally: |
| sys.stderr = old_stderr |
| |
| return _impl |
| |
| |
| def isolated_logging(f): |
| |
| @functools.wraps(f) |
| def _impl(*args, **kwargs): |
| reload_module(logging) |
| reload_module(grpc) |
| try: |
| f(*args, **kwargs) |
| finally: |
| reload_module(logging) |
| |
| return _impl |
| |
| |
| class LoggingTest(unittest.TestCase): |
| |
| @isolated_logging |
| def test_logger_not_occupied(self): |
| self.assertEqual(0, len(logging.getLogger().handlers)) |
| |
| @patch_stderr |
| @isolated_logging |
| def test_handler_found(self): |
| self.assertEqual(0, len(sys.stderr.getvalue())) |
| |
| @isolated_logging |
| def test_can_configure_logger(self): |
| intended_stream = six.StringIO() |
| logging.basicConfig(stream=intended_stream) |
| self.assertEqual(1, len(logging.getLogger().handlers)) |
| self.assertTrue( |
| logging.getLogger().handlers[0].stream is intended_stream) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(verbosity=2) |