Dashboard - Add more logging around Sheriffs and alert creation.

dashboard/dashboard/find_anomalies.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.
 
 """Processes tests and creates new Anomaly entities.
 
 This module contains the ProcessTest function, which searches the recent
 points in a test for potential regressions or improvements, and creates
 new Anomaly entities.
 """
@@ skipping 68 matching lines @@
   change_points = FindChangePointsForTest(rows, config)
   change_points = yield _FilterAnomaliesFoundInRef(
       change_points, test_key, len(rows))
 
   anomalies = [_MakeAnomalyEntity(c, test, rows) for c in change_points]
 
   # If no new anomalies were found, then we're done.
   if not anomalies:
     return
 
-  logging.info('Found at least one anomaly in: %s', test.test_path)
+  logging.info('Created %d anomalies', len(anomalies))
+  logging.info(' Test: %s', test_key.id())
+  logging.info(' Sheriff: %s', test.sheriff.id())
 
   # Update the last_alerted_revision property of the test.
   test.last_alerted_revision = anomalies[-1].end_revision
   yield test.put_async()
   yield alert_group.GroupAlertsAsync(
       anomalies, utils.TestSuiteName(test.key), 'Anomaly')
 
   # TODO(simonhatch): email_sheriff.EmailSheriff() isn't a tasklet yet, so this
   # code will run serially.
   # Email sheriff about any new regressions.
@@ skipping 279 matching lines @@
   Returns:
     True if it is improvement anomaly, otherwise False.
   """
   if (median_before < median_after and
       test.improvement_direction == anomaly.UP):
     return True
   if (median_before >= median_after and
       test.improvement_direction == anomaly.DOWN):
     return True
   return False