Issue 4726 - Add tests for the element hiding emulation content script

test_runner.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 33 matching lines @@
     if (testPath.split(path.sep).includes("browser"))
     {
       if (path.extname(testPath) == ".html")
         qunitFiles.push(testPath);
     }
     else if (path.extname(testPath) == ".js")
       nodeunitFiles.push(testPath);
   }
 }
 if (process.argv.length > 2)
+{
   addTestPaths(process.argv.slice(2), true);
+}
 else
+{
   addTestPaths(
     [path.join(__dirname, "test"), path.join(__dirname, "test", "browser")],
-    true);
+    true
+  );
+}
 
 if (nodeunitFiles.length)
   nodeunit.reporters.default.run(nodeunitFiles);
-qunitFiles.forEach(file => qunit(path.resolve(file)));
+for (let file of qunitFiles)
+  qunit(file);