var moduleStubs = {};
var originalJsLoader = require.extensions['.js'];

var stubOnModule = function(module) {
  var path          = require.resolve(module);
  var stub           = sinon.stub();
  moduleStubs[path] = stub;
  delete require.cache[path];
  return stub;
};

require.extensions['.js'] = function (obj, path) {
  if (moduleStubs[path])
    obj.exports = moduleStubs[path];
  else
    return originalJsLoader(obj, path);
};

afterEach(function() {
  for (var path in moduleStubs) {
    delete moduleStubs[path];
  }
});