Can't use zones with jsdom

[DaveMBush]

I'm trying to run jsdom to run my angular2 test with karma. JsDom tries to set onreadystatechange to null and fails. The problem exist because jsdom doesn't define onreadystatechange using defineProperty() but zones sets the property as readonly in property-descriptor.ts (line 73).

Adding a setter seems to fix the problem

  Object.defineProperty(XMLHttpRequest.prototype, 'onreadystatechange', {
    enumerable: true,
    configurable: true,
    get: function() {
      return this.orsc;
    },
    set: function(f) {
      this.orsc = f;
    }
  });
  const req = new XMLHttpRequest();
  req.onreadystatechange = function(){}
  const result = !!req.onreadystatechange;

[JiaLiPassion]

@DaveMBush , which version of zone.js you are using, I think this has been fixed in earlier release.

[DaveMBush]

Version 0.8.5

[JiaLiPassion]

@DaveMBush , could you provide a reproduce repo?

[DaveMBush]

https://github.com/DaveMBush/Ng2-JsDom