Make backward-forward compatible version.

appengine/swarming/server/task_to_run_test.py

 #!/usr/bin/env python
 # Copyright 2014 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 import datetime
 import logging
 import os
 import random
 import sys
@@ skipping 27 matching lines @@
 def _gen_request(properties=None, **kwargs):
   """Creates a TaskRequest."""
   props = {
     'command': [u'command1'],
     'dimensions': {u'pool': u'default'},
     'env': {},
     'execution_timeout_secs': 24*60*60,
     'io_timeout_secs': None,
   }
   props.update(properties or {})
+  props['dimensions_dict'] = props.pop('dimensions')
   now = utils.utcnow()
   args = {
     'created_ts': now,
     'name': 'Request name',
     'priority': 50,
     'properties': task_request.TaskProperties(**props),
     'expiration_ts': now + datetime.timedelta(seconds=60),
     'tags': [u'tag:1'],
     'user': 'Jesus',
   }
@@ skipping 543 matching lines @@
     task_to_run.set_lookup_cache(to_run.key, True)
     self.assertEqual(False, task_to_run._lookup_cache_is_taken(to_run.key))
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   unittest.main()