Question

I’m writing some simple jasmine tests and I’m getting an exception since the code I’m testing is looking for a form that doesn’t exist because there’s no DOM when testing a js file only: $("form")[0] in the tested js file leads to:

TypeError: $(...)[0] is undefined

I read a bit about jasmine-jquery and realized I can use some html fixture with an external html file. That flow seems quite messy, since all I need to do is only to add an empty valid form so that the test (which focusing on something else) will run, something like <form></form> appending would be enough I think.

At first I thought that sandbox() function will be the solution, but it seems that it creates only divs, and I need a form.

Any simple way to add some elements by using only code in jasmine spec file?

Answer 1

The simplest solution is to add the form to the DOM by yourself in the before block and then delete it in the after block:

describe(function(){
  var form;

  beforeEach(function(){
    form = $('<form>');
    $(document.body).append(form);
  });

  it('your test', function(){


  })

  afterEach(function(){
   form.remove();
   form = null;
  });
});

Also writing your sandbox helper isn’t that hard:

function sandbox(html){
  var el;

  beforeEach(function(){
    el = $(html);
    $(document.body).append(el);
  });


  afterEach(function(){
   el.remove();
   el = null;
});