Issue 1853 - Moved filter generation into background page

qunit/tests/cssEscaping.js

 (function()
 {
   var filterClasses = require("filterClasses");
   var Filter = filterClasses.Filter;
   var ElemHideFilter = filterClasses.ElemHideFilter;
 
-  module(
-    "CSS escaping",
-    {
-      setup: function()
-      {
-        var frame = document.createElement("iframe");
-        frame.srcdoc = '<script src="../include.postload.js"></script>';
+  var filterComposer = require("filterComposer");
+  var escapeCSS = filterComposer.escapeCSS;
+  var quoteCSS = filterComposer.quoteCSS;
 
-        stop();
-        frame.addEventListener("load", function()
-        {
-          start();
-
-          this.escapeCSS = frame.contentWindow.escapeCSS;
-          this.quote = frame.contentWindow.quote;
-
-          document.body.removeChild(frame);
-        }.bind(this));
-
-        document.body.appendChild(frame);
-      }
-    }
-  );
+  module("CSS escaping");
 
   test("CSS escaping", function()
   {
-    var escapeCSS = this.escapeCSS;
-    var quote = this.quote;
-
     function testSelector(opts)
     {
       var mustMatch = opts.mustMatch !== false;
       var doc = document.implementation.createHTMLDocument();
 
       var style = doc.createElement("style");
       doc.documentElement.appendChild(style);
       style.sheet.insertRule(opts.selector + " {}", 0);
 
       var element;
@@ skipping 50 matching lines @@
         selector: "." + escapeCSS(s),
         attributes: {class: s},
 
         // Whitespace characters split the class name, hence the selector
         // won't match. But we still have to make sure that no exception
         // is thrown when calling .querySelector() and .insertRule()
         mustMatch: !/\s/.test(s)
       });
 
       testSelector({
-        selector: "[foo=" + quote(s) + "]",
+        selector: "[foo=" + quoteCSS(s) + "]",
         attributes: {foo: s}
       });
     }
 
     for (var i = 0; i < 0x80; i++)
     {
       var chr = String.fromCharCode(i);
 
       // Make sure that all ASCII characters are correctly escaped.
       testEscape(chr);
 
       // Some characters are only escaped when in the first positon,
       // so we still have to make sure that everything is correctly escaped
       // in subsequent positions.
       testEscape("x" + chr);
 
       // Leading dashes must be escaped, when followed by certain characters.
       testEscape("-" + chr);
     }
 
     // Test some non-ASCII characters. However, those shouldn't require escaping.
     testEscape("\uD83D\uDE3B\u2665\u00E4");
   });
 })();