"use strict"; let Base = function Base() { babelHelpers.classCallCheck(this, Base); }; let Obj = /*#__PURE__*/function (_Base) { babelHelpers.inherits(Obj, _Base); var _super = babelHelpers.createSuper(Obj); function Obj() { babelHelpers.classCallCheck(this, Obj); return _super.apply(this, arguments); } babelHelpers.createClass(Obj, [{ key: "get", value: function get() { return babelHelpers.get(babelHelpers.getPrototypeOf(Obj.prototype), "test", this); } }]); return Obj; }(Base); Object.defineProperty(Obj.prototype, 'test', { value: 2, writable: true, configurable: true }); const obj = new Obj(); expect(obj.test).toBe(2); expect(obj.get()).toBeUndefined();