function TestCase(n, d, e, a) { this.name = n this.description = d } function reportCompare(expected, actual, description) { new TestCase } var actual = ''; var expect = ''; for (var i = 0; i < 2; ++i) reportCompare(expect, actual, ': 2'); try { ({ valueOf: gc } - []) } catch (prop) {} function addThis() reportCompare(expect, actual, 'ok'); Object.defineProperty(Object.prototype, "name", { set: function (newValue) {} }); addThis()