Error when running `npm test` in CircleCI
EwanValentine opened this issue · comments
I have an application built using this starter kit, which all works locally fine. However, when I run npm test as part of my build, I'm getting a strange error which seems to originate from PhantomJS
START:
PhantomJS 2.1.1 (Linux 0.0.0) ERROR
ReferenceError: Can't find variable: Symbol
at webpack:///~/zen-observable-ts/lib/zenObservable.js:394:0 <- tests/test-bundler.js:76335
PhantomJS 2.1.1 (Linux 0.0.0) ERROR
ReferenceError: Can't find variable: Symbol
at webpack:///~/zen-observable-ts/lib/zenObservable.js:394:0 <- tests/test-bundler.js:76335
Same here, it's coming from an ES6 for of iterator.
It looks like PhantomJS needs to be polyfilled, I didn't manage to make it work yet.
Glad it's not just me! I've tried a few different versions of node without any luck. I've had to skip tests on build for now which is obviously not ideal...
Try installing es6-symbol and es5-ext then adding this to the file normalize.js, it worked for me
// 4) Symbol
// ------------------------------------
// PhantomJS doesn't implement ES6 for.. of loops
if (typeof Symbol === 'undefined') {
require('es6-symbol/implement')
}
if (typeof [][Symbol.iterator] === 'undefined') {
require('es5-ext/array/#/@@iterator/implement')
}
The idea is to polyfill Symbol and array[Symbol.iterator] that for..of loops require
