Add ability to specify jQuery object

[knownasilya]

At the moment chai-jquery assumes jQuery is jQuery on the window object, but this isn't always the case, e.g. Ember has Ember.$. Allow an option to specify the jQuery object.

[tadas-s]

I'm dealing with a similar issue: multiple jQuery instances. How about replacing this:

if (obj instanceof $) { /* ... */ }

to this:

if ('jquery' in Object(obj)) { /* ... */ }

Based on this SO answer. Duck test instead of instance test.

[knownasilya]

Should probably be 'jQuery', no?

[tadas-s]

Nope. It's just a property where jQuery provides version:

> 'jquery' in Object($("body"))
true
> $("body").jquery
"1.11.0"

[knownasilya]

Ah, make sense. Always forget that's how you get the version, kinda off putting.

[eeroan]

Related to this issue, I was thinking of using chai-jquery with zombie.js. Jquery is available from browser.window.$. Now I have to write following after each page load, since browser.window.$ will be new after each page load:

before(function () {
  chai.use(function (chai, utils) {
    return chaiJquery(chai, utils, browser.window.$)
  })
})

What if users could implement a function that is called for every assertion:

chai.use(function (chai, utils) {
  return chaiJquery(chai, utils, function() { return browser.window.$})
})

[brian-mann]

Would really love to see this. I'm in a similar situation where the hard coded instanceof check is really problematic. I have multiple versions of jQuery and have to do some crazy juggling to make this work.

[eeroan]

I made a pull request #66

[brian-mann]

This pull request would fix my issue, any reason why it can't move ahead?

[jgerigmeyer]

+1