add simple test for log_setting.LogTeeHandler

tests/test_log_setting.py

@@ -0,0 +1,42 @@
+# Copyright 2022 TIER IV, INC. All rights reserved.
+#
+# 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.
+
+
+from __future__ import annotations
+
+import logging
+
+from otaclient.app import log_setting
+
+MODULE = log_setting.__name__
+logger = logging.getLogger(__name__)
+
+
+def test_server_logger():
+    test_log_msg = "emit one logging entry"
+
+    # ------ setup test ------ #
+    _handler = log_setting._LogTeeHandler()
+    logger.addHandler(_handler)
+
+    # ------ execution ------ #
+    logger.info(test_log_msg)
+
+    # ------ clenaup ------ #
+    logger.removeHandler(_handler)
+
+    # ------ check result ------ #
+    _queue = _handler._queue
+    _log = _queue.get_nowait()
+    assert _log == test_log_msg