Test backbone pubSub event triggers call their expected functions in jasmine spec

gistfile1.txt

class BackbonePubSub

  @verifyEvent: (klass, name, methodName, callMethod = "registerEvents") ->
    match = false
    oldFn = Backbone.pubSub.on # get existing pubSub.on method
    class KlassNoConstructor extends klass # extend original class so we can disable constructor
      constructor: -> # zap the constructor of the target class
    instance = new KlassNoConstructor
    Backbone.pubSub.on = (triggerName, method) -> 
      match = true if triggerName == name and method == instance[methodName] # are we triggering on the right method?
    instance[callMethod]()  # call the event registration method
    Backbone.pubSub.on = oldFn # restore original Backbone pubSub.on method
    match

window.BackbonePubSub = BackbonePubSub # export to global namespace