Convert batch timestamp to string.

Author: daspecster

logging/google/cloud/logging/logger.py

@@ -476,7 +476,7 @@ def commit(self, client=None):
             if http_req is not None:
                 info['httpRequest'] = http_req
             if timestamp is not None:
-                info['timestamp'] = timestamp
+                info['timestamp'] = _datetime_to_rfc3339(timestamp)
             entries.append(info)
 
         client.logging_api.write_entries(entries, **kwargs)

logging/unit_tests/test_logger.py

@@ -667,10 +667,13 @@ def test_commit_w_bound_client(self):
             'type': 'global',
         }
         ENTRIES = [
-            {'textPayload': TEXT, 'insertId': IID1, 'timestamp': TIMESTAMP1},
-            {'jsonPayload': STRUCT, 'insertId': IID2, 'timestamp': TIMESTAMP2},
+            {'textPayload': TEXT, 'insertId': IID1,
+             'timestamp': TIMESTAMP1.strftime("%Y-%m-%dT%H:%M:%S.%fZ")},
+            {'jsonPayload': STRUCT, 'insertId': IID2,
+             'timestamp': TIMESTAMP2.strftime("%Y-%m-%dT%H:%M:%S.%fZ")},
             {'protoPayload': json.loads(MessageToJson(message)),
-             'insertId': IID3, 'timestamp': TIMESTAMP3},
+             'insertId': IID3,
+             'timestamp': TIMESTAMP3.strftime("%Y-%m-%dT%H:%M:%S.%fZ")},
         ]
         client = _Client(project=self.PROJECT)
         api = client.logging_api = _DummyLoggingAPI()