In the process of learning Jasmine, I've come to this issue. I want a basic function to run, then set a timeout to call itself again... simple stuff.

class @LoopObj
  constructor: ->
  loop: (interval) ->
    #do some stuff
    setTimeout((=>@loop(interval)), interval)

But I want to test to make sure the setTimeout was called with the proper args

describe "loop", ->
  xit "does nifty things", ->
  it "loops at a given interval", ->
    my_nifty_loop = new LoopObj
    interval = 10
    spyOn(window, "setTimeout")
    my_nifty_loop.loop(interval)
    expect(setTimeout).toHaveBeenCalledWith((-> my_nifty_loop.loop(interval)), interval)

I get this error: Expected spy setTimeout to have been called with [ Function, 10 ] but was called with [ [ Function, 10 ] ]

Is this because the (-> my_nifty_loop.loop(interval)) function does not equal the (=>@loop(interval)) function? Or does it have something to do with the extra square brackets around the second [ [ Function, 10 ] ]? Something else altogther?

Where have I gone wrong?