PASS result is correctValue PASS result is correctValue PASS (function() { 'use strict'; location.valueOf = 'haxored'; return location.valueOf(); }()) threw exception TypeError: Cannot assign to read only property 'valueOf' of object '[object Location]'. PASS (function() { location.valueOf = 'haxored'; return location.valueOf(); }()) did not throw exception. PASS (function() { 'use strict'; delete location.valueOf; }()) threw exception TypeError: Cannot delete property 'valueOf' of [object Location]. PASS (function() { delete location.valueOf; return !!location.valueOf}()) is true PASS successfullyParsed is true TEST COMPLETE