Fix JS tests

common/lib/xmodule/xmodule/js/spec/combinedopenended/display_spec.coffee

@@ -29,6 +29,7 @@ describe 'CombinedOpenEnded', ->
     beforeEach =>
       # setup the spies
       @combined = new CombinedOpenEnded @element
+      spyOn(@combined, 'reload').andCallFake -> return 0
       window.setTimeout = jasmine.createSpy().andCallFake (callback, timeout) -> return 5
 
     it 'polls at the correct intervals', =>
@@ -44,6 +45,7 @@ describe 'CombinedOpenEnded', ->
       @combined.poll()
       expect(window.queuePollerID).toBeUndefined()
       expect(window.setTimeout).not.toHaveBeenCalled()
+      expect(@combined.reload).toHaveBeenCalled()
 
   describe 'rebind', ->
     beforeEach ->

common/lib/xmodule/xmodule/js/src/combinedopenended/display.coffee

@@ -329,7 +329,7 @@ class @CombinedOpenEnded
     $.postWithPrefix "#{@ajax_url}/check_for_score", (response) =>
       if response.state == "done" or response.state=="post_assessment"
         delete window.queuePollerID
-        location.reload()
+        @reload
       else
         window.queuePollerID = window.setTimeout(@poll, 10000)
 
@@ -353,3 +353,7 @@ class @CombinedOpenEnded
     new_text = ''
     new_text = "<span class='#{answer_class}' id='#{answer_id}'>#{answer_val}</span>"
     @answer_area.replaceWith(new_text)
+
+  # wrap this so that it can be mocked
+  reload: ->
+    location.reload()