added test for naive timestamp

Author: Chaim-Leib Halbert

test/conversions/iso8601_test.py

@@ -410,6 +410,11 @@ def test_bad_iso_to_timedelta(self):
             # used '#' instead of '-'
             make_datetime('2014-06-19T17:03#17.361077-05:00')
 
+        with self.assertRaises(ValueError):
+            # naive timestamps raise ValueError
+            make_datetime('2014-06-19T16:40:22.293913')
+
+
     def test_bad_timedelta_to_iso(self):
         with self.assertRaises(AssertionError):
             jsonify_datetime('2014-06-19T17:03:17.361077-05:00')