[Findit] don't included skipped or unknown tests in swarming tasks into failed tests.

appengine/findit/model/test/wf_swarming_task_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 unittest
 
 from model.wf_swarming_task import WfSwarmingTask
 
 
 class WfSwarmingTaskTest(unittest.TestCase):
   def testClassifiedTests(self):
     task =  WfSwarmingTask.Create('m', 'b', 121, 'browser_tests')
     task.tests_statuses = {
         'TestSuite1.test1': {
             'total_run': 2,
             'SUCCESS': 2
         },
         'TestSuite1.test2': {
             'total_run': 4,
             'SUCCESS': 2,
             'FAILURE': 2
         },
         'TestSuite1.test3': {
             'total_run': 6,
             'FAILURE': 6
+        },
+        'TestSuite1.test4': {
+            'total_run': 6,
+            'SKIPPED': 6
+        },
+        'TestSuite1.test5': {
+            'total_run': 6,
+            'UNKNOWN': 6
         }
     }
 
     expected_classified_tests = {
         'flaky_tests': ['TestSuite1.test2', 'TestSuite1.test1'],
-        'reliable_tests': ['TestSuite1.test3']
+        'reliable_tests': ['TestSuite1.test3', 'TestSuite1.test4'],
+        'unknown_tests': ['TestSuite1.test5']
     }
 
     self.assertEqual(expected_classified_tests, task.classified_tests)