"use strict"; function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; } let Base = function Base() {}; let Obj = /*#__PURE__*/ function (_Base) { _inheritsLoose(Obj, _Base); function Obj() { return _Base.apply(this, arguments) || this; } var _proto = Obj.prototype; _proto.get = function get() { return _Base.prototype.test; }; 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();