Findit] Flake Checker: Pipeline to trigger try jobs to identify flake culprits

appengine/findit/model/flake/test/master_flake_analysis_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.
 
 from datetime import datetime
 
 from gae_libs.testcase import TestCase
 
 from model import analysis_status
 from model import result_status
@@ skipping 171 matching lines @@
     unexpected_build_number = 124
     data_point = DataPoint()
     data_point.build_number = expected_build_number
 
     analysis = MasterFlakeAnalysis.Create('m', 'b', 125, 's', 't')
     analysis.suspected_flake_build_number = unexpected_build_number
     analysis.data_points.append(data_point)
 
     self.assertIsNone(analysis.GetDataPointOfSuspectedBuild())
 
+  def testGetCommitPosition(self):
+    data_point = DataPoint()
+    data_point.blame_list = ['r1', 'r2', 'r3']
+    data_point.commit_position = 100
+    data_point.previous_build_commit_position = 97
 
+    self.assertEqual(98, data_point.GetCommitPosition('r1'))
+    self.assertEqual(99, data_point.GetCommitPosition('r2'))
+    self.assertEqual(100, data_point.GetCommitPosition('r3'))
+
+  def testGetRevisionAtCommitPosition(self):
+    data_point = DataPoint()
+    data_point.blame_list = ['r1', 'r2', 'r3']
+    data_point.commit_position = 100
+    data_point.previous_build_commit_position = 97
+
+    self.assertEqual('r1', data_point.GetRevisionAtCommitPosition(98))
+    self.assertEqual('r2', data_point.GetRevisionAtCommitPosition(99))
+    self.assertEqual('r3', data_point.GetRevisionAtCommitPosition(100))