Use strtime() in to_primitive() for datetime objs.

This patch updates jsonutils.to_primitive() to use timeutils.strtime()
to convert a datimetime object to a string instead of just using str().
This ensures that we can easily convert the string back to a datetime
using timeutils.parse_strtime().

Required for the nova blueprint no-db-messaging.

Change-Id: I725b333695930e12e2832378102514326fec639c

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/unit/test_timeutils.py b/tests/unit/test_timeutils.py
index d0b773a..7dbd608 100644
--- a/tests/unit/test_timeutils.py
+++ b/tests/unit/test_timeutils.py
@@ -59,6 +59,12 @@ class TimeUtilsTest(unittest.TestCase):
         expect = timeutils.parse_strtime(perfect_time_format)
         self.assertEqual(self.skynet_self_aware_time_perfect, expect)
 
+    def test_strtime_and_back(self):
+        orig_t = datetime.datetime(1997, 8, 29, 6, 14, 0)
+        s = timeutils.strtime(orig_t)
+        t = timeutils.parse_strtime(s)
+        self.assertEqual(orig_t, t)
+
     def test_is_older_than(self):
         with mock.patch('datetime.datetime') as datetime_mock:
             datetime_mock.utcnow.return_value = self.skynet_self_aware_time