gistfile1.js

["Test"].forEach(function makeStub(className) {
  const global = this;
  global[className] = function () {
    if (!avm2) {
      throw new Error("AVM2 not initialized");
    }

    var c = avm2.systemDomain.getClass(className);
    assert(c.instance);
    global[className] = c.instance;
    return c.createInstance.apply(c, arguments);
  };
});
var TestImpl = {
  initialize: function (x) {
    print("native constructor");
    this.x_ = x;
  },

  getX: function() {
    return this.x_;
  }
};

natives.TestClass = function TestClass(runtime, scope, instance, baseClass) {
  function TestInstance() {
    this.initialize(arguments[0]);
    instance.apply(this, arguments);
  }

  var c = new runtime.domain.system.Class("Test", TestInstance);
  c.extend(baseClass);
  c.mixin(TestImpl);

  c.nativeStatics = {
    spawn: function (arg) {
      var o = new Test(arg);
      print(o.getX());
      return o;
    }
  };

  c.nativeMethods = {
    "get x": TestImpl.getX
  };

  return c;
};