Fix partytime.

Tools/GardeningServer/model/test/ct-failures-tests.html

 <!--
 Copyright 2014 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.
 -->
 
 <link rel="import" href="../ct-failures.html">
 
 <link rel="import" href="../../lib/network-simulator.html">
 <link rel="import" href="../ct-commit-list.html">
@@ skipping 331 matching lines @@
             assert.propertyVal(repositoryCommitList, 'expanded', true);
           });
         });
       });
     });
   });
 
   describe('processTrooperFailures', function() {
     it('should filter out updates that are not alerts', function() {
       var analyzer = new CTFailures(new CTCommitList(undefined, []));
+      analyzer.failures = {};
       analyzer._processTrooperFailures(
           {'key_1': {'tree_1': {should_alert: true, should_appear: true},
                      'tree_2': {should_alert: false, should_appear: false}},
            'key_2': {'tree_3': {should_alert: false, should_appear: false},
                      'tree_4': {should_alert: true, should_appear: true}}});
       analyzer.failures['trooper'].forEach(function(failure) {
         assert(failure.data.data.should_appear);
       });
       assert(analyzer.failures['trooper'].length == 2);
     });
   });
 
 });
 
 })()
 </script>