Using chai-as-promised in protractor

Question

Following this example I can get tests working with the expect syntax but not with the should syntax.

The following works:

var expect = chai.expect;
describe('expect syntax', function() {
    it('should work', function() {
        ...
        expect(promise).to.eventually.eql('something');
    });
});

But this does not:

chai.should();
describe('should syntax', function() {
    it('should work', function() {
        ...
        (true).should.be.true;
        promise.should.eventually.eql('something');
    });
});

Since I get the following error: TypeError: Cannot read property 'eventually' of undefined I assume that should does its usual thing of extending the Object prototype but this somehow doesn't apply to the webdriver promise Object. What is wrong here?

Answer 1

Following my issue and this other issue that I somehow missed, it would appear that the source of the problem is that webdriverjs promises are based on promise/A and promise/B while chai-as-expected is expecting promise/A+ types promises.

Wrapping the websriverjs promise in a Q promise solved the issue:

Q(webdriverjspromise).should.eventually.eql('something')

Answer 2

This works for us..

  var element = $('#mainDiv');      
  expect(element.isEnabled()).to.eventually.to.equal(true, "Expect Button to be enabled.");

I'd make sure that the "promise' is really a promise, and does eql work? I've always used equal.

On a side note we're using Cucumber with Chai & Chai-as-promised but it shouldn't matter with the promise.