Native Promises are an extremely recent addition (I'm not even sure if it's officially standard yet), so this is not surprising whatsoever. Are there native Promises in your code/tests, or is the error coming from mocha-phantomjs?

They're in my code. Any plan to add support in the near future? Or do you know of any other headless browsers that have implemented them? I suppose I'll have to shim them into my test page otherwise.

Also, (and this is a separate issue, but) same question regarding support for Array-like objects in Function.prototype.apply.

+1 😄

+1

+1

👍

@JamesMGreene some update about this? :)

I ended using a simple workaround; adding this Promise Polyfill at the beginning of the tests, hope be util for you!

Although the current master isn't quite where we hoped it would be, we are planning to release it as v2.0.0 on January 23rd (?) and work out the remaining kinks from there once we can all shift focus to v2.x.

That said: I have not verified that the native Promise API is implemented in master.

PhantomJS 2 doesn't have native Promise API.

+1

Promise is available natively in all modern browsers except IEs (IE12 has it)... it's a must have!

+1

Node has Promises, ECMA6 will have them and notably SilmerJS has them already. The SlimerJS devs had the idea to make webpage.open to return a Promise which is IMHO a great improvement to the API.