Fix test_encode_datetime test

Author: kunteng

tests/test_index.py

@@ -3,7 +3,7 @@
 from __future__ import unicode_literals
 
 import os
-import time
+import calendar
 from random import randint
 from decimal import Decimal
 from datetime import datetime
@@ -111,7 +111,7 @@ def test_encode_datetime(self):
         self.index.wait_task(task['taskID'])
 
         res = self.index.get_object(task['objectID'])
-        self.assertEqual(res['now'], time.mktime(value.timetuple()))
+        self.assertEqual(res['now'], calendar.timegm(value.utctimetuple()))
 
     def test_synonyms(self):
         task = self.index.add_object({'name': '589 Howard St., San Francisco'})