CORD-1743: Some unit tests + fixed config bugs

Change-Id: I1e8c95334184662f245572d0d2cd1431b8bada9d
diff --git a/tests/test_logger.py b/tests/test_logger.py
new file mode 100644
index 0000000..f76902c
--- /dev/null
+++ b/tests/test_logger.py
@@ -0,0 +1,81 @@
+
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
+
+
+import unittest
+import mock
+import pdb
+import os, sys
+import multistructlog
+import logging
+
+class MockLogging:
+    def debug(self, str):
+        return str
+
+class TestMultiStructLog(unittest.TestCase):
+    def setUp(self):
+        self.logging_config= { 
+                'version': 1,
+                'handlers': { 
+                    'default': {
+                        'class': 'logging.StreamHandler',
+                    },
+                },
+                
+                'loggers': { 
+                    '': { 
+                        'handlers': ['default'],
+                        'level': 'INFO',
+                        'propagate': True
+                }, 
+            }
+        }
+
+        self.config = {'logging':self.logging_config}
+
+    @mock.patch('multistructlog.logging')
+    def test_reload(self, mock_logging):
+        logger = multistructlog.create_logger({'logging':{'version':1, 'foo':'bar'}})
+        logger0 = multistructlog.create_logger({'logging':{'version':1, 'foo':'bar'}})
+        logger2 = multistructlog.create_logger({'logging':{'version':1, 'foo':'notbar'}})
+        self.assertEqual(logger, logger0)
+        self.assertNotEqual(logger,logger2)
+
+        # "Starting" is only printed once 
+        self.assertEqual(mock_logging.StreamHandler.call_count, 2)
+    
+    @mock.patch('multistructlog.logging')
+    def test_level(self, mock_logging):
+        logger = multistructlog.create_logger({'logging':{'version':1, 'foo':'x'}})
+        logger.info('Test 1')
+        logger.debug('Test 2')
+
+        # Default level is INFO
+        self.assertEqual(mock_logging.StreamHandler.call_count, 1)
+
+    @mock.patch('multistructlog.logging')
+    def test_override_level(self, mock_logging):
+        self.config['logging']['loggers']['']['level'] = 'DEBUG'
+        logger = multistructlog.create_logger(self.config)
+
+        logger.info('Test 1')
+        logger.debug('Test 2')
+        pdb.set_trace()
+
+        self.assertEqual(mock_logging.StreamHandler.call_count, 2)
+
+if __name__ == '__main__':
+    unittest.main()