Noissue - Add a test to confirm an evil rewrite gets cancelled

test/filterClasses.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 528 matching lines @@
 
   test.equal(
     filterRelative.rewriteUrl("http://content.server/file/foo.txt?bar"),
     "http://content.server/file/foo.txt/disable"
   );
   test.equal(
     filterRelative.rewriteUrl("http://example.com/file/foo.txt?bar"),
     "http://example.com/file/foo.txt/disable"
   );
 
+  // Example from https://github.com/uBlockOrigin/uBlock-issues/issues/46#issuecomment-391190533
+  // The rewrite shouldn't happen.
+  let rewriteEvil = "/(^https?:\\/\\/[^/])/$script,rewrite=$1.evil.com";
+  let filterEvil = Filter.fromText(rewriteEvil);
+
+  test.equal(
+    filterEvil.rewriteUrl("https://www.adblockplus.org/script.js"),
+    "https://www.adblockplus.org/script.js"
+  );
+
   test.done();
 };