[Findit] Make sure build data is updated when use build master.

appengine/findit/waterfall/test/build_util_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.
 
 import datetime
 
 from testing_utils import testing
 
 from model.wf_build import WfBuild
 from waterfall import build_util
@@ skipping 129 matching lines @@
     build.put()
 
     self.UpdateUnitTestConfigSettings(
         'download_build_data_settings', {'use_chrome_build_extract': False})
     self._MockUrlfetchWithBuildData(master_name, builder_name, build_number,
                                     build_data='Test get build data')
 
     build_util.DownloadBuildData(master_name, builder_name, build_number)
 
     self.assertEqual(build.data_source, build_util.BUILDBOT_MASTER)
+
+  def testDownloadBuildDataSourceFromBMUpateBuildData(self):
+    master_name = 'm'
+    builder_name = 'b'
+    build_number = 123
+    build = WfBuild.Create(master_name, builder_name, build_number)
+    build.data = 'Original build data'
+    build.last_crawled_time = self._TimeBeforeNowBySeconds(360)
+    build.put()
+
+    self.UpdateUnitTestConfigSettings(
+        'download_build_data_settings', {'use_chrome_build_extract': False})
+    self._MockUrlfetchWithBuildData(master_name, builder_name, build_number,
+                                    build_data='Test get build data')
+
+    build_util.DownloadBuildData(master_name, builder_name, build_number)
+
+    self.assertEqual(build.data_source, build_util.BUILDBOT_MASTER)
+    self.assertEqual(build.data, 'Test get build data from build master')