old_contents: var path = require("path")
    , npm = require("npm")
    , fs = require("fs");
  
  exports.expressCreateServer = function (hook_name, args, cb) {
    args.app.get('/tests/frontend/specs_list.js', function(req, res){
      fs.readdir('tests/frontend/specs', function(err, files){
  
        fs.readdir('node_modules', function(err, plugins){ // installed plugins
          plugins.forEach(function(plugin){ // for each one
            if(fs.existsSync("node_modules/"+plugin+"/tests/frontend/specs")){ // If the folder exists
              fs.readdir("node_modules/"+plugin+"/tests/frontend/specs/", function(err, pluginFiles){
                files.push(pluginFiles);
              });
            }
          });
        });
  
        if(err){ return res.send(500); }
  
        res.send("var specs_list = " + JSON.stringify(files.sort()) + ";\n"); 
      });
    });
  
    var url2FilePath = function(url){
      var subPath = url.substr("/tests/frontend".length);
      if (subPath == ""){
        subPath = "index.html"
      }
      subPath = subPath.split("?")[0];
  
      var filePath = path.normalize(npm.root + "/../tests/frontend/")
      filePath += subPath.replace("..", "");
      return filePath;
    }
  
    args.app.get('/tests/frontend/specs/*', function (req, res) {
      var specFilePath = url2FilePath(req.url);
      var specFileName = path.basename(specFilePath);
  
      fs.readFile(specFilePath, function(err, content){
        if(err){ return res.send(500); }
     
        content = "describe(" + JSON.stringify(specFileName) + ", function(){   " + content + "   });";
  
        res.send(content);
      }); 
    });
  
    args.app.get('/tests/frontend/*', function (req, res) {
      var filePath = url2FilePath(req.url);
      res.sendfile(filePath);
    });
  
    args.app.get('/tests/frontend', function (req, res) {
      res.redirect('/tests/frontend/');
    }); 
  }
  
new_contents: var path = require("path")
    , npm = require("npm")
    , fs = require("fs");
  
  exports.expressCreateServer = function (hook_name, args, cb) {
    args.app.get('/tests/frontend/specs_list.js', function(req, res){
      fs.readdir('tests/frontend/specs', function(err, files){
  
        fs.readdir('node_modules', function(err, plugins){ // installed plugins
          plugins.forEach(function(plugin){ // for each one
            if(fs.existsSync("node_modules/"+plugin+"/tests/frontend/specs")){ // If the folder exists
              fs.readdir("node_modules/"+plugin+"/tests/frontend/specs/", function(err, pluginFiles){
                files.push("/static/plugins/"+plugin+"/tests/frontend/specs/"+pluginFiles);
              });
            }
          });
        });
  
        if(err){ return res.send(500); }
  
        res.send("var specs_list = " + JSON.stringify(files.sort()) + ";\n"); 
      });
    });
  
    var url2FilePath = function(url){
      var subPath = url.substr("/tests/frontend".length);
      if (subPath == ""){
        subPath = "index.html"
      }
      subPath = subPath.split("?")[0];
  
      var filePath = path.normalize(npm.root + "/../tests/frontend/")
      filePath += subPath.replace("..", "");
      return filePath;
    }
  
    args.app.get('/tests/frontend/specs/*', function (req, res) {
      var specFilePath = url2FilePath(req.url);
      var specFileName = path.basename(specFilePath);
  
      fs.readFile(specFilePath, function(err, content){
        if(err){ return res.send(500); }
     
        content = "describe(" + JSON.stringify(specFileName) + ", function(){   " + content + "   });";
  
        res.send(content);
      }); 
    });
  
    args.app.get('/tests/frontend/*', function (req, res) {
      var filePath = url2FilePath(req.url);
      res.sendfile(filePath);
    });
  
    args.app.get('/tests/frontend', function (req, res) {
      res.redirect('/tests/frontend/');
    }); 
  }
  
subject: correct path