Test for correct handling of exceptions from instanceof and 'new' expressions On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS new {}.undefined threw exception TypeError: 'undefined' is not a constructor (evaluating 'new {}.undefined'). PASS 1 instanceof {}.undefined threw exception TypeError: 'undefined' is not a valid argument for 'instanceof' (evaluating '1 instanceof {}.undefined'). PASS successfullyParsed is true TEST COMPLETE