Simulate transient error and verify exponential backoff.

net/tools/testserver/chromiumsync_test.py

 #!/usr/bin/python2.4
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Tests exercising chromiumsync and SyncDataModel."""
 
 import pickle
 import unittest
 
@@ skipping 419 matching lines @@
     sieve.SaveProgress(3000, response)  # Already up to date
     self.assertEqual(2, len(response.new_progress_marker))
     self.assertFalse(response.HasField('new_timestamp'))
     marker = self.FindMarkerByNumber(response.new_progress_marker, theme)
     self.assertEqual(pickle.loads(marker.token), (3000, 1))
     self.assertFalse(marker.HasField('timestamp_token_for_migration'))
     marker = self.FindMarkerByNumber(response.new_progress_marker, autofill)
     self.assertEqual(pickle.loads(marker.token), (3000, 1))
     self.assertFalse(marker.HasField('timestamp_token_for_migration'))
 
+  def testCheckRaiseTransientError(self):
+    testserver = chromiumsync.TestServer()
+    http_code, raw_respon = testserver.HandleSetTransientError()
+    self.assertEqual(http_code, 200)
+    try:
+      testserver.CheckTransientError()
+      self.fail('Should have raised transient error exception')
+    except chromiumsync.TransientError:
+      self.assertTrue(testserver.transient_error)
+
   def testUpdateSieveStoreMigration(self):
     autofill = autofill_specifics_pb2.autofill
     theme = theme_specifics_pb2.theme
     migrator = chromiumsync.MigrationHistory()
     msg = sync_pb2.GetUpdatesMessage()
     marker = msg.from_progress_marker.add()
     marker.data_type_id = autofill.number
     marker.token = pickle.dumps((15412, 1))
     marker = msg.from_progress_marker.add()
     marker.data_type_id = theme.number
@@ skipping 96 matching lines @@
     marker.token = pickle.dumps((15412, 5))
     marker = msg.from_progress_marker.add()
     marker.data_type_id = theme.number
     marker.token = pickle.dumps((15413, 4))
     sieve = chromiumsync.UpdateSieve(msg, migrator)
     sieve.CheckMigrationState()
 
 
 if __name__ == '__main__':
   unittest.main()