geoffreybooth / es6-javascript-class-interop

Do ES6 classes classes play nicely with ES5 and CoffeeScript Classes?

JavaScript and CoffeeScript Classes Interoperability

Get the results

1. clone the repo
2. npm install
3. npm test

What do the results say?

• ES6 classes can extend ES5 and CoffeeScript classes
• CoffeeScript can extend ES5 classes, but CoffeeScript cannot extend ES6 classes
• ES5 can extend CoffeeScript classes, but ES5 cannot extend ES6 classes

classes interop
classes interop ➞  es5 extending es5
classes interop ➞  es5 extending es5 ✔
classes interop ➞  es5 extending es6
classes interop ➞  es5 extending es6 ✘
classes interop ➞  es5 extending coffee
classes interop ➞  es5 extending coffee ✔
classes interop ➞  es6 extending es5
classes interop ➞  es6 extending es5 ✔
classes interop ➞  es6 extending es6
classes interop ➞  es6 extending es6 ✔
classes interop ➞  es6 extending coffee
classes interop ➞  es6 extending coffee ✔
classes interop ➞  coffee extending es5
classes interop ➞  coffee extending es5 ✔
classes interop ➞  coffee extending es6
classes interop ➞  coffee extending es6 ✘
classes interop ➞  coffee extending coffee
classes interop ➞  coffee extending coffee ✔
classes interop ✔

FAILURE: 7/9 tests ran successfully; 2 failed, 0 incomplete, 2 errors

Error #1:
classes interop ➞  es5 extending es6
TypeError: Class constructors cannot be invoked without 'new'
    at new BaseClass (class.es:3:3)
    at BaseClass.NewClass (extends.js:3:16)
    at check (test.js:8:12)
    at EventEmitterGrouped.<anonymous> (test.js:38:5)
    at ambi (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/ambi/out/lib/ambi.js:57:27)
    at Domain.fireMethod (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/taskgroup/out/lib/taskgroup.js:385:23)
    at Domain.run (domain.js:228:14)
    at EventEmitterGrouped.Task.fire (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/taskgroup/out/lib/taskgroup.js:423:27)
    at Immediate._onImmediate (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/taskgroup/out/lib/taskgroup.js:440:26)
    at processImmediate [as _immediateCallback] (timers.js:383:17)

Error #2:
classes interop ➞  coffee extending es6
TypeError: Class constructors cannot be invoked without 'new'
    at NewClass.BaseClass (class.es:3:3)
    at new NewClass (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/extends.coffee:11:40)
    at check (test.js:8:12)
    at EventEmitterGrouped.<anonymous> (test.js:38:5)
    at ambi (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/ambi/out/lib/ambi.js:57:27)
    at Domain.fireMethod (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/taskgroup/out/lib/taskgroup.js:385:23)
    at Domain.run (domain.js:228:14)
    at EventEmitterGrouped.Task.fire (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/taskgroup/out/lib/taskgroup.js:423:27)
    at Immediate._onImmediate (/Users/balupton/Projects/active/classes-coffeescript-vs-javascript/node_modules/taskgroup/out/lib/taskgroup.js:440:26)
    at processImmediate [as _immediateCallback] (timers.js:383:17)

npm ERR! Test failed.  See above for more details.