testing dom manipulation with Jasmine

script.js

(function(window){

  add_pic = function (options) {
    $('#pic').append("<img href='http://google.com/logo.jpg'/>");
  };

test.coffee

describe "dom manipulation", ->
  beforeEach ->
    el = "<div id='pic'></div>"
    $(document.body).append el

  afterEach ->
    $('#pic').remove()

  it "should add an element to pic", ->
    add_pic()
    expect($('#pic').children().length).toEqual 1