[Findit] Implementing swarming task error detection

appengine/findit/waterfall/test/process_flake_swarming_task_result_pipeline_test.py

 # Copyright 2016 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.
 
 import datetime
 
 from model import analysis_status
 from model.flake.flake_swarming_task import FlakeSwarmingTask
 from model.flake.master_flake_analysis import MasterFlakeAnalysis
 from waterfall import swarming_util
 from waterfall.process_flake_swarming_task_result_pipeline import (
     ProcessFlakeSwarmingTaskResultPipeline)
 from waterfall.test import (
     process_base_swarming_task_result_pipeline_test as base_test)
 from waterfall.test import wf_testcase
 
 
 class ProcessFlakeSwarmingTaskResultPipelineTest(wf_testcase.WaterfallTestCase):
 
   def _MockedGetSwarmingTaskResultById(self, task_id, _):
-    return base_test._SWARMING_TASK_RESULTS[task_id]
+    return base_test._SWARMING_TASK_RESULTS[task_id], None
 
   def setUp(self):
     super(ProcessFlakeSwarmingTaskResultPipelineTest, self).setUp()
     self.pipeline = ProcessFlakeSwarmingTaskResultPipeline()
     self.master_name = 'm'
     self.builder_name = 'b'
     self.build_number = 121
     self.step_name = 'abc_tests on platform'
     self.test_name = 'TestSuite1.test1'
     self.version_number = 1
@@ skipping 47 matching lines @@
         self.build_number, self.step_name, test_name)
     self.assertEqual(0, task.tries)
     self.assertEqual(0, task.successes)
 
     analysis = MasterFlakeAnalysis.GetVersion(
         self.master_name, self.builder_name,
         self.build_number, self.step_name, test_name, self.version_number)
     self.assertTrue(analysis.data_points[-1].pass_rate < 0)
 
   def _MockedGetSwarmingTaskFailureLog(self, *_):
-    return base_test._SAMPLE_FAILURE_LOG
+    return base_test._SAMPLE_FAILURE_LOG, None
 
   def testProcessFlakeSwarmingTaskResultPipeline(self):
     # End to end test.
     self.mock(swarming_util, 'GetSwarmingTaskFailureLog',
               self._MockedGetSwarmingTaskFailureLog)
 
     task = FlakeSwarmingTask.Create(
         self.master_name, self.builder_name,
         self.build_number, self.step_name, self.test_name)
     task.task_id = 'task_id1'
@@ skipping 19 matching lines @@
 
     self.assertEqual(analysis_status.COMPLETED, task.status)
     self.assertEqual(base_test._EXPECTED_TESTS_STATUS, task.tests_statuses)
 
     self.assertEqual(datetime.datetime(2016, 2, 10, 18, 32, 6, 538220),
                      task.created_time)
     self.assertEqual(datetime.datetime(2016, 2, 10, 18, 32, 9, 90550),
                      task.started_time)
     self.assertEqual(datetime.datetime(2016, 2, 10, 18, 33, 9),
                      task.completed_time)