[Findit] Add failure type to dashboard.

appengine/findit/model/test/wf_analysis_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 datetime import datetime
 
 import unittest
 
 from common.waterfall import failure_type
 from model.wf_analysis import WfAnalysis
@@ skipping 121 matching lines @@
 
   def testFailureTypeForLegacyDataWithFailedCompileStep(self):
     analysis = WfAnalysis.Create('m', 'b', 123)
     analysis.result = {'failures': [{'step_name': 'compile'}]}
     self.assertEqual(failure_type.COMPILE, analysis.failure_type)
 
   def testFailureTypeForLegacyDataWithFailedTestStep(self):
     analysis = WfAnalysis.Create('m', 'b', 123)
     analysis.result = {'failures': [{'step_name': 'browser_tests'}]}
     self.assertEqual(failure_type.TEST, analysis.failure_type)
+
+  def testFailureTypeStr(self):
+    analysis = WfAnalysis.Create('m', 'b', 123)
+    analysis.result = {'failures': [{'step_name': 'browser_tests'}]}
+    self.assertEqual('test', analysis.failure_type_str)