Test String.prototype.normalize. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Basic function properties PASS typeof String.prototype.normalize is "function" PASS String.prototype.normalize.name is "normalize" PASS String.prototype.normalize.length is 0 PASS Object.getOwnPropertyDescriptor(String.prototype, 'normalize').configurable is true PASS Object.getOwnPropertyDescriptor(String.prototype, 'normalize').enumerable is false PASS Object.getOwnPropertyDescriptor(String.prototype, 'normalize').writable is true Invokes ToString on the argument. PASS String.prototype.normalize.call(listener) is "WebKit" PASS listener.callCount is 1 PASS successfullyParsed is true TEST COMPLETE