Add test for set_up_logging

test/test_init_logging.py

@@ -0,0 +1,17 @@
+"""Unit tests for ssm/__init__.py."""
+
+import unittest
+
+import ssm
+
+
+class setUpLoggingTest(unittest.TestCase):
+    """Test cases for the set_up_logging function in ssm.__init__."""
+
+    def test_none_argurments(self):
+        """Check that calling the function with all None args fails."""
+        self.assertRaises(KeyError, ssm.set_up_logging, None, None, None)
+
+
+if __name__ == '__main__':
+    unittest.main()