Underscore.js Mixin to stub an object methods - Useful when libraries are meant to work on a live environment (login exception for instance, with window.Rollbar)

stub.js.coffee

# Usage: window.myObject = _.stub('myObject', {error: null, print: null})
_.mixin
  stub: (objectName, props)->
    res = {};
    for prop of props
      if props[prop]?
        res[prop] = props[prop]
      else
        res[prop] = ((method)->
          ->
            args = Array.prototype.slice.call(arguments)
            args.unshift(objectName+" "+method+" stub")
            console.log.apply(console, args)
        )(prop)
  res