This tests that ToString(Symbol) behaviors. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS String(Symbol.iterator) is "Symbol(Symbol.iterator)" PASS String(Symbol.prototype) threw exception TypeError: Symbol.prototype.valueOf requires that |this| be a symbol or a symbol object. PASS Symbol.prototype.toString.call(Symbol.iterator) is "Symbol(Symbol.iterator)" PASS Symbol.prototype.toString.call(Symbol('hello')) is "Symbol(hello)" PASS Symbol.prototype.toString.call(Symbol()) is "Symbol()" PASS Object.prototype.toString.call(Symbol()) is "[object Symbol]" PASS Object.prototype.toString.call(Symbol.prototype) is "[object Symbol]" PASS Object.prototype.toString.call(Symbol) is "[object Function]" PASS successfullyParsed is true TEST COMPLETE