Node 4.0 and Mocha Generator Functions

[dschinkel]

Just wondering if I need to try to use middleware such as gulp-mocha-co or mocha-generators since Node 4.0 includes support for generators via ES6.

So should we assume we should be able to now run tests like this with Node 4.0 which would use ES6 natively?

it('should return all countries when no id passed', function*(done){

    ..some code
    responseModel.countries.should.have.length(2);
    responseModel.countries[0].id.should.equal(55);
    responseModel.countries[1].id.should.equal(10);
    done();
});

[danielstjules]

ES6 supports generators, but coroutines are a little different. While you might be able to use generator functions with specs, mocha doesn't do anything special for coroutine support (what allows you to yield promises) This was proposed in #1575 but closed.

In the meantime, it looks like https://github.com/blakeembrey/co-mocha is the recommended solution! :)

[danielstjules]

co-mocha doesn't depend on the --harmony flag, it only depends on generators being enabled. With node 4, they're enabled by default. So if you were using --harmony-generators or --harmony with node 0.12 or iojs, you don't need those flags anymore :)

[danielstjules]

Oh, gulp-mocha-co uses a fork of mocha (https://github.com/ilkkao/co-mocha) Didn't realize that.

Instead, I'd just use: https://github.com/sindresorhus/gulp-mocha with https://github.com/blakeembrey/co-mocha Then, your config could look something like:

var gulp = require('gulp');
var mocha = require('gulp-mocha');

gulp.task('default', function () {
    return gulp.src('test.js', {read: false})
        .pipe(mocha({require: 'co-mocha'}));
});