javascript - Testing DOM manipulating in Jasmine test

Question

I'm creating a js widget and first part is to add script width javascript, something like this (example from google analytics):

(function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

How to test it with jasmine (using fixtures?)?

Answer 1

For setting up HTML fixtures in my specs, I wrote jasmine-fixture. With it, you can do stuff like this:

var $foo, $input;
beforeEach(function(){
  $foo = affix('.foo');
    # appends to the DOM <div class="foo"></div> 
  $input = $foo.affix('input[id="name"][value="Jim"]');
    # appends <input id="name" value="Jim"/> beneath the .foo div

And afterEach, it'll clean up after you.

For expectations about the state of the DOM, I use jasmine-jquery. It offers a ton of matchers like the one below:

it('is named Jim', function(){
  expect($input).toHaveValue("Jim");
});