[Findit] Check the explicit culprit from try-job if it is set.

appengine/findit/waterfall/test/identify_try_job_culprit_pipeline_test.py

 # Copyright 2015 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 testing_utils import testing
 
 from common.git_repository import GitRepository
 from model import analysis_status
 from model.wf_try_job import WfTryJob
 from model.wf_try_job_data import WfTryJobData
@@ skipping 57 matching lines @@
         'rev2',
         IdentifyTryJobCulpritPipeline._GetFailedRevisionFromCompileResult(
             {
                 'report': {
                     'result': {
                         'rev1': 'passed',
                         'rev2': 'failed'
                     }
                 }
             }))
+    self.assertEqual(
+        'rev1',
+        IdentifyTryJobCulpritPipeline._GetFailedRevisionFromCompileResult(
+            {
+                'report': {
+                    'result': {
+                        'rev1': 'failed',
+                        'rev2': 'failed'
+                    },
+                    'culprit': 'rev1',
+                }
+            }))
 
   def testIdentifyCulpritForCompileTryJobNoCulprit(self):
     master_name = 'm'
     builder_name = 'b'
     build_number = 1
     try_job_id = '1'
 
     try_job = WfTryJob.Create(master_name, builder_name, build_number)
     try_job.put()
     try_job_data = WfTryJobData.Create(try_job_id)
@@ skipping 355 matching lines @@
         'a_test': {
             'a_test1': 'rev1',
             'a_test2': 'rev2',
         },
         'b_test': {
             'b_test1': 'rev1',
         },
         'c_test': 'rev2'
         }
     self.assertEqual(expected_culprit_data, try_job_data.culprits)