using chai-as-promised caused error when run with grunt-mocha

[rweng]

Hi,

I just added chai-as-promised to a project of mine. The tests run fine in real browsers, but not with phantom js. I get

TypeError: 'undefined' is not a function (evaluating 'promise.then.bind(promise)')
      at file:///Users/robin/Code/project/node_modules/chai-as-promised/lib/chai-as-promised.js:25
      at doAsserterAsyncAndAddThen (file:///Users/robin/Code/project/node_modules/chai-as-promised/lib/chai-as-promised.js:310)
      at file:///Users/robin/Code/lproject/node_modules/chai-as-promised/lib/chai-as-promised.js:283
      at file:///Users/robin/Code/project/node_modules/chai/chai.js:4462

Any spontaneous ideas why that could be?

[kmiyashiro]

No idea, I'm not familiar with chai-as-promised. I'm guessing promise is undefined? But the way it gets passed the promise is probably the root of the problem. I'd have to know more about your setup to investigate further, but you can try setting log to true and doing some console.logs to see what's going on.

[rweng]

Turns out, Function.prototype.bind is undefined. See ariya/phantomjs#10522.

Adding the polyfill at the beginning of my runner.html worked for me.

[kmiyashiro]

Closing out as it's a phantom issue

[wethinkagile]

You might find this interesting, it provides the polyfill: https://github.com/princed/karma-chai-plugins