Issue 616 - Add tests for $generichide and $genericblock

chrome/content/tests/elemhide.js

 (function()
 {
   let server = null;
   let frame = null;
 
   module("Element hiding", {
     setup: function()
     {
       prepareFilterComponents.call(this);
       preparePrefs.call(this);
@@ skipping 128 matching lines @@
         {
           let doc = frame.contentDocument;
           equal(doc.getElementById("test1").offsetHeight > 0 ? "visible" : "hidden", expected[0], "First element visible");
           equal(doc.getElementById("test2").offsetHeight > 0 ? "visible" : "hidden", expected[1], "Second element visible");
 
           start();
         });
       }, false, true);
       frame.setAttribute("src", "http://localhost:1234/test");
     };
+    FilterNotifier.addListener(listener);
 
     for (let filter_text of filters)
     {
       let filter = Filter.fromText(filter_text);
       if (filter instanceof WhitelistFilter)
         defaultMatcher.add(filter);
       else
         ElemHide.add(filter);
     }
 
-    FilterNotifier.addListener(listener);
     ElemHide.isDirty = true;
     ElemHide.apply();
   }
 
   let stageDescriptions = {
     1: "running without exceptions",
     2: "running with whitelisted document",
     3: "running with exception not applying to documents",
     4: "running with element hiding exception",
   };
 
   for (let test = 0; test < tests.length; test++)
   {
     let [filters, expected] = tests[test];
     for (let stage = 1; stage in stageDescriptions; stage++)
       asyncTest(filters.join(", ") + " (" + stageDescriptions[stage] + ")", runTest.bind(null, tests[test], stage));
   }
 })();