Add failing unit test

src/python/grpcio_tests/tests/unit/BUILD.bazel

@@ -17,6 +17,7 @@ GRPCIO_TESTS_UNIT = [
     "_interceptor_test.py",
     "_invalid_metadata_test.py",
     "_invocation_defects_test.py",
+    "_logging_test.py",
     "_metadata_code_details_test.py",
     "_metadata_test.py",
     # TODO: Issue 16336

src/python/grpcio_tests/tests/unit/_logging_test.py

@@ -0,0 +1,26 @@
+# 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
+import grpc
+import logging
+
+class LoggingTest(unittest.TestCase):
+  def test_logger_not_occupied(self):
+    self.assertEqual(0, len(logging.getLogger().handlers))
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)