Zombie.js + Vows: Capybara-like synchronous chain example

zombie.synchronousChain.coffee

# ... require zombie, vows, etc.  ...

events = require("events")

zombie.synchronousChain = (browser, steps)->
  promise = new(events.EventEmitter)
  zombie._linkInTheChain(promise, browser, steps)
  promise

zombie._linkInTheChain = (promise, browser, steps)->
  step = steps.shift()

  if step?
    step(browser)
    browser.wait ()->
      zombie._linkInTheChain(promise, browser, steps)
  else
    promise.emit('success', browser)


emptyCallback = ()-> null

suite = vows.describe("Searching by Vehicle: Handling Bad ZIP Codes")
suite.browser = new zombie.Browser(debug: false)

suite.addBatch "when we walk through the vehicle search form and give an invalid ZIP code":
  topic: ()->
    zombie.synchronousChain @suite.browser, [
      (b)-> b.visit("http://localhost:3000/widget/")
      (b)-> b.select("vehicle-year", "2009")
      (b)-> b.select("vehicle-make", "Ford")
      (b)-> b.select("vehicle-model", "Mustang")
      (b)-> b.select("vehicle-option", "V6 Premium w/Pony Pkg. (Coupe & Convertible)")
      (b)-> b.fill("vehicle-zip", "junkjunkjunk")
      (b)-> b.pressButton "search-vehicles", emptyCallback
    ]
    
  "displays messages that ....": (err, b)->
    results = b.html("#search-results-container")
    # ... do some assertions ...
  
suite.export(module)

On line 24, at least when using "zombie": "^2.0.0-alpha31" I needed to do:

suite.browser = new zombie(debug: false)

https://gist.github.com/sirkkalap/6677121eb83d640d34c6#file-zombie-synchronouschain-coffee-L26