Trigger jQuery DOM ready callbacks any time you like in mocha JS tests.

example.coffee

# Code:

$ ->  # a.k.a. jQuery.ready ->
  $("#hash-value-when-page-loaded").text(location.hash)
  

# Test:

location.hash = "foo"
fakeDomReady()
$("#hash-value-when-page-loaded").text().should.equal "#foo"

jquery_fake_ready.js.coffee

# Wrap jQuery.ready so we can trigger it in
# our mocha tests, which replace the body after
# the original ready event.

window.domReadyFunctions = []

window.fakeDomReady = ->
  fn() for fn in domReadyFunctions

$.fn.oldReady = $.fn.ready

$.fn.ready = (fn) ->
  domReadyFunctions.push(fn) if fn
  $.fn.oldReady.apply(this, arguments)

If you use Sinonjs, you can just do this...

sinon.stub($.fn, 'ready', function(fn) {
    fn();
});