This tests an early experimental implementation of ES6-esque Symbols. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS prop in o is false PASS 'prop' in o is false PASS Object.getOwnPropertyNames(o).length is 0 PASS forIn(o) is [] PASS prop in o is true PASS 'prop' in o is false PASS Object.getOwnPropertyNames(o).length is 0 PASS forIn(o) is [] PASS o[prop] is 42 PASS o['prop'] is 101 PASS Object.getOwnPropertyNames(o).length is 1 PASS forIn(o) is ["prop"] PASS prop in o is false PASS 'prop' in o is true PASS Object.getOwnPropertyNames(o).length is 1 PASS forIn(o) is ["prop"] PASS successfullyParsed is true TEST COMPLETE