Only try to compute running_all_jobs time if we know when try-job verifier started

appengine/chromium_cq_status/handlers/test/patch_summary_test.py

 # Copyright 2014 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.
 
 from datetime import datetime
 import json
 import logging
 import os
 
 from third_party.testing_utils import testing
 
 import main
 from model.record import Record
 
 
 class PatchSummaryTest(testing.AppengineTestCase):
   app_module = main.app
 
   def test_patch_summary_simple(self):
     return self._test_patch('simple')
 
   def test_patch_summary_flaky(self):
     return self._test_patch('flaky')
 
+  def test_no_verifier_start(self):
+    return self._test_patch('no_verifier_start')
+
   # TODO(sergeyberezin): add a small real-life CL for an integration
   # test.
 
   def _load_records(self, filename):
     assert Record.query().count() == 0
     records = _load_json(filename)
     for record in records:
       self.mock_now(datetime.utcfromtimestamp(record['timestamp']))
       Record(
         id=record['key'],
         tags=record['tags'],
         fields=record['fields'],
       ).put()
 
   def _test_patch(self, name, issue=123456789):
     self._load_records('patch_%s.json' % name)
     response = self.test_app.get('/patch-summary/%s/1' % issue)
     summary = json.loads(response.body)
     logging.debug(json.dumps(summary, indent=2))
     return summary
 
 
 def _load_json(filename):
   path = os.path.join(os.path.dirname(__file__), 'resources', filename)
   return json.loads(open(path).read())