Test behaviour of strict mode On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS testThis.call(null) is null PASS testThis.call(1) is 1 PASS testThis.call(true) is true PASS testThis.call(false) is false PASS testThis.call(undefined) is undefined PASS testThis.call('a string') is 'a string' PASS testThisDotAccess.call('a string') is 'a string'.length PASS testThisDotAccess.call(null) threw exception TypeError: 'null' is not an object (evaluating 'this.length'). PASS testThisDotAccess.call(undefined) threw exception TypeError: 'undefined' is not an object (evaluating 'this.length'). PASS testThisDotAccess.call(true) is undefined. PASS testThisDotAccess.call(false) is undefined. PASS testThisDotAccess.call(1) is undefined. PASS testThisBracketAccess.call('a string', 'length') is 'a string'.length PASS testThisBracketAccess.call(null, 'length') threw exception TypeError: 'null' is not an object (evaluating 'this[prop]'). PASS testThisBracketAccess.call(undefined, 'length') threw exception TypeError: 'undefined' is not an object (evaluating 'this[prop]'). PASS testThisBracketAccess.call(true, 'length') is undefined. PASS testThisBracketAccess.call(false, 'length') is undefined. PASS testThisBracketAccess.call(1, 'length') is undefined. PASS Function('"use strict"; return this;')() is undefined. PASS Function('"use strict"; with({});') threw exception SyntaxError: Parse error. PASS testGlobalAccess() is undefined PASS testThis.call() is undefined PASS testThis.apply() is undefined PASS testThis.call(undefined) is undefined PASS testThis.apply(undefined) is undefined PASS (function eval(){'use strict';}) threw exception SyntaxError: Parse error. PASS (function(){(function eval(){'use strict';})}) threw exception SyntaxError: Parse error. PASS (function (eval){'use strict';}) threw exception SyntaxError: Parse error. PASS (function(){(function (eval){'use strict';})}) threw exception SyntaxError: Parse error. PASS (function arguments(){'use strict';}) threw exception SyntaxError: Parse error. PASS (function(){(function arguments(){'use strict';})}) threw exception SyntaxError: Parse error. PASS (function (arguments){'use strict';}) threw exception SyntaxError: Parse error. PASS (function(){(function (arguments){'use strict';})}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; var eval;}) threw exception SyntaxError: Parse error. PASS (function(){(function (){'use strict'; var eval;})}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; var arguments;}) threw exception SyntaxError: Parse error. PASS (function(){(function (){'use strict'; var arguments;})}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; try{}catch(eval){}}) threw exception SyntaxError: Parse error. PASS (function(){(function (){'use strict'; try{}catch(eval){}})}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; try{}catch(arguments){}}) threw exception SyntaxError: Parse error. PASS (function(){(function (){'use strict'; try{}catch(arguments){}})}) threw exception SyntaxError: Parse error. PASS (function (a, a){'use strict';}) threw exception SyntaxError: Parse error. PASS (function(){(function (a, a){'use strict';})}) threw exception SyntaxError: Parse error. PASS (function (a){'use strict'; delete a;})() threw exception SyntaxError: Parse error. PASS (function(){(function (a){'use strict'; delete a;})()}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; var a; delete a;})() threw exception SyntaxError: Parse error. PASS (function(){(function (){'use strict'; var a; delete a;})()}) threw exception SyntaxError: Parse error. PASS (function (){var a; function f() {'use strict'; delete a;} })() threw exception SyntaxError: Parse error. PASS (function(){(function (){var a; function f() {'use strict'; delete a;} })()}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; with(1){};}) threw exception SyntaxError: Parse error. PASS (function(){(function (){'use strict'; with(1){};})}) threw exception SyntaxError: Parse error. PASS (function (){'use strict'; arguments.callee; })() threw exception TypeError: Unable to access callee of strict mode function. PASS (function (){'use strict'; arguments.caller; })() threw exception TypeError: Unable to access caller of strict mode function. PASS (function f(){'use strict'; f.arguments; })() threw exception TypeError: Can't access arguments object of a strict mode function. PASS (function f(){'use strict'; f.caller; })() threw exception TypeError: Cannot access caller property of a strict mode function. PASS (function f(){'use strict'; f.arguments=5; })() threw exception TypeError: Cannot access arguments property of a strict mode function. PASS (function f(){'use strict'; f.caller=5; })() threw exception TypeError: Cannot access caller property of a strict mode function. PASS (function (arg){'use strict'; arguments.callee; })() threw exception TypeError: Unable to access callee of strict mode function. PASS (function (arg){'use strict'; arguments.caller; })() threw exception TypeError: Unable to access caller of strict mode function. PASS (function f(arg){'use strict'; f.arguments; })() threw exception TypeError: Can't access arguments object of a strict mode function. PASS (function f(arg){'use strict'; f.caller; })() threw exception TypeError: Cannot access caller property of a strict mode function. PASS (function f(arg){'use strict'; f.arguments=5; })() threw exception TypeError: Cannot access arguments property of a strict mode function. PASS (function f(arg){'use strict'; f.caller=5; })() threw exception TypeError: Cannot access caller property of a strict mode function. PASS 'use strict'; (function (){with(1){};}) threw exception SyntaxError: Parse error. PASS (function(){'use strict'; (function (){with(1){};})}) threw exception SyntaxError: Parse error. PASS 'use strict'; (function (){var a; delete a;}) threw exception SyntaxError: Parse error. PASS (function(){'use strict'; (function (){var a; delete a;})}) threw exception SyntaxError: Parse error. PASS 'use strict'; var a; (function (){ delete a;}) threw exception SyntaxError: Parse error. PASS (function(){'use strict'; var a; (function (){ delete a;})}) threw exception SyntaxError: Parse error. PASS var a; (function (){ 'use strict'; delete a;}) threw exception SyntaxError: Parse error. PASS (function(){var a; (function (){ 'use strict'; delete a;})}) threw exception SyntaxError: Parse error. PASS 'misc directive'; 'use strict'; with({}){} threw exception SyntaxError: Parse error. PASS (function(){'misc directive'; 'use strict'; with({}){}}) threw exception SyntaxError: Parse error. PASS 'use strict'; return threw exception SyntaxError: Parse error. PASS 'use strict'; break threw exception SyntaxError: Parse error. PASS (function(){'use strict'; break}) threw exception SyntaxError: Parse error. PASS 'use strict'; continue threw exception SyntaxError: Parse error. PASS (function(){'use strict'; continue}) threw exception SyntaxError: Parse error. PASS 'use strict'; for(;;)return threw exception SyntaxError: Parse error. PASS 'use strict'; for(;;)break missingLabel threw exception SyntaxError: Parse error. PASS (function(){'use strict'; for(;;)break missingLabel}) threw exception SyntaxError: Parse error. PASS 'use strict'; for(;;)continue missingLabel threw exception SyntaxError: Parse error. PASS (function(){'use strict'; for(;;)continue missingLabel}) threw exception SyntaxError: Parse error. PASS 'use strict'; 007; threw exception SyntaxError: Parse error. PASS (function(){'use strict'; 007;}) threw exception SyntaxError: Parse error. PASS 'use strict'; '\007'; threw exception SyntaxError: Parse error. PASS (function(){'use strict'; '\007';}) threw exception SyntaxError: Parse error. PASS '\007'; 'use strict'; threw exception SyntaxError: Parse error. PASS (function(){'\007'; 'use strict';}) threw exception SyntaxError: Parse error. PASS 'use strict'; delete aDeletableProperty; threw exception SyntaxError: Parse error. PASS (function(){'use strict'; delete aDeletableProperty;}) threw exception SyntaxError: Parse error. PASS 'use strict'; (function (){ delete someDeclaredGlobal;}) threw exception SyntaxError: Parse error. PASS (function(){'use strict'; (function (){ delete someDeclaredGlobal;})}) threw exception SyntaxError: Parse error. PASS (function (){ 'use strict'; delete someDeclaredGlobal;}) threw exception SyntaxError: Parse error. PASS (function(){(function (){ 'use strict'; delete someDeclaredGlobal;})}) threw exception SyntaxError: Parse error. PASS 'use strict'; if (0) { someGlobal = 'Shouldn\'t be able to assign this.'; }; true; is true PASS 'use strict'; someGlobal = 'Shouldn\'t be able to assign this.'; threw exception ReferenceError: Strict mode forbids implicit creation of global property 'someGlobal'. PASS 'use strict'; eval('var introducedVariable = "FAIL: variable introduced into containing scope";'); introducedVariable threw exception ReferenceError: Can't find variable: introducedVariable. PASS 'use strict'; objectWithReadonlyProperty.prop = 'fail' threw exception TypeError: Attempted to assign to readonly property.. PASS 'use strict'; delete objectWithReadonlyProperty.prop threw exception TypeError: Unable to delete property.. PASS 'use strict'; delete objectWithReadonlyProperty[readonlyPropName] threw exception TypeError: Unable to delete property.. PASS 'use strict'; ++eval threw exception SyntaxError: Parse error. PASS (function(){'use strict'; ++eval}) threw exception SyntaxError: Parse error. PASS 'use strict'; eval++ threw exception SyntaxError: Parse error. PASS (function(){'use strict'; eval++}) threw exception SyntaxError: Parse error. PASS 'use strict'; --eval threw exception SyntaxError: Parse error. PASS (function(){'use strict'; --eval}) threw exception SyntaxError: Parse error. PASS 'use strict'; eval-- threw exception SyntaxError: Parse error. PASS (function(){'use strict'; eval--}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { ++arguments } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { ++arguments }}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { arguments++ } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { arguments++ }}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { --arguments } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { --arguments }}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { arguments-- } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { arguments-- }}) threw exception SyntaxError: Parse error. PASS global.eval('"use strict"; if (0) ++arguments; true;') threw exception SyntaxError: Parse error. PASS 'use strict'; ++(1, eval) threw exception ReferenceError: Prefix ++ operator applied to value that is not a reference.. PASS (function(){'use strict'; ++(1, eval)}) threw exception SyntaxError: Parse error. PASS 'use strict'; (1, eval)++ threw exception ReferenceError: Postfix ++ operator applied to value that is not a reference.. PASS (function(){'use strict'; (1, eval)++}) threw exception SyntaxError: Parse error. PASS 'use strict'; --(1, eval) threw exception ReferenceError: Prefix -- operator applied to value that is not a reference.. PASS (function(){'use strict'; --(1, eval)}) threw exception SyntaxError: Parse error. PASS 'use strict'; (1, eval)-- threw exception ReferenceError: Postfix -- operator applied to value that is not a reference.. PASS (function(){'use strict'; (1, eval)--}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { ++(1, arguments) } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { ++(1, arguments) }}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { (1, arguments)++ } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { (1, arguments)++ }}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { --(1, arguments) } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { --(1, arguments) }}) threw exception SyntaxError: Parse error. PASS 'use strict'; function f() { (1, arguments)-- } threw exception SyntaxError: Parse error. PASS (function(){'use strict'; function f() { (1, arguments)-- }}) threw exception SyntaxError: Parse error. PASS 'use strict'; if (0) delete +a.b threw exception SyntaxError: Parse error. PASS (function(){'use strict'; if (0) delete +a.b}) threw exception SyntaxError: Parse error. PASS 'use strict'; if (0) delete ++a.b threw exception SyntaxError: Parse error. PASS (function(){'use strict'; if (0) delete ++a.b}) threw exception SyntaxError: Parse error. PASS 'use strict'; if (0) delete void a.b threw exception SyntaxError: Parse error. PASS (function(){'use strict'; if (0) delete void a.b}) threw exception SyntaxError: Parse error. PASS (function (a){'use strict'; a = false; return a !== arguments[0]; })(true) is true PASS (function (a){'use strict'; arguments[0] = false; return a !== arguments[0]; })(true) is true PASS (function (a){'use strict'; a=false; return arguments; })(true)[0] is true PASS (function (a){'use strict'; arguments[0]=false; return a; })(true) is true PASS (function (a){'use strict'; arguments[0]=true; return arguments; })(false)[0] is true PASS (function (){'use strict'; arguments[0]=true; return arguments; })(false)[0] is true PASS (function (a){'use strict'; arguments[0]=true; a=false; return arguments; })()[0] is true PASS (function (a){'use strict'; arguments[0]=false; a=true; return a; })() is true PASS (function (a){'use strict'; arguments[0]=true; return arguments; })()[0] is true PASS (function (){'use strict'; arguments[0]=true; return arguments; })()[0] is true PASS (function (a){'use strict'; var local; (function (){local;})(); a = false; return a !== arguments[0]; })(true) is true PASS (function (a){'use strict'; var local; (function (){local;})(); arguments[0] = false; return a !== arguments[0]; })(true) is true PASS (function (a){'use strict'; var local; (function (){local;})(); a=false; return arguments; })(true)[0] is true PASS (function (a){'use strict'; var local; (function (){local;})(); arguments[0]=false; return a; })(true) is true PASS (function (a){'use strict'; var local; (function (){local;})(); arguments[0]=true; return arguments; })(false)[0] is true PASS (function (){'use strict'; var local; (function (){local;})(); arguments[0]=true; return arguments; })(false)[0] is true PASS (function (a){'use strict'; var local; (function (){local;})(); arguments[0]=true; a=false; return arguments; })()[0] is true PASS (function (a){'use strict'; var local; (function (){local;})(); arguments[0]=true; return arguments; })()[0] is true PASS (function (a){'use strict'; var local; (function (){local;})(); arguments[0]=false; a=true; return a; })() is true PASS (function (){'use strict'; var local; (function (){local;})(); arguments[0]=true; return arguments; })()[0] is true PASS 'use strict'; (function (){var a = true; eval('var a = false'); return a; })() is true PASS (function (){var a = true; eval('"use strict"; var a = false'); return a; })() is true PASS (function f(arg){'use strict'; return Object.getOwnPropertyDescriptor(f, 'arguments').value; })() is undefined. PASS (function f(arg){'use strict'; return Object.getOwnPropertyDescriptor(f, 'caller').value; })() is undefined. PASS (function f(arg){'use strict'; return Object.getOwnPropertyDescriptor(arguments, 'callee').value; })() is undefined. PASS (function f(arg){'use strict'; return Object.getOwnPropertyDescriptor(arguments, 'caller').value; })() is undefined. PASS (function f(arg){'use strict'; var descriptor = Object.getOwnPropertyDescriptor(arguments, 'caller'); return descriptor.get === descriptor.set; })() is true PASS (function f(arg){'use strict'; var descriptor = Object.getOwnPropertyDescriptor(arguments, 'callee'); return descriptor.get === descriptor.set; })() is true PASS (function f(arg){'use strict'; var descriptor = Object.getOwnPropertyDescriptor(f, 'caller'); return descriptor.get === descriptor.set; })() is true PASS (function f(arg){'use strict'; var descriptor = Object.getOwnPropertyDescriptor(f, 'arguments'); return descriptor.get === descriptor.set; })() is true PASS 'use strict'; (function f() { for(var i in this); })(); true; is true PASS 'use strict'̻ threw exception SyntaxError: Parse error. PASS (function(){'use strict'̻}) threw exception SyntaxError: Parse error. PASS 'use strict'5.f threw exception SyntaxError: Parse error. PASS (function(){'use strict'5.f}) threw exception SyntaxError: Parse error. PASS 'use strict';̻ threw exception SyntaxError: Parse error. PASS (function(){'use strict';̻}) threw exception SyntaxError: Parse error. PASS 'use strict';5.f threw exception SyntaxError: Parse error. PASS (function(){'use strict';5.f}) threw exception SyntaxError: Parse error. PASS 'use strict';1-(eval=1); threw exception SyntaxError: Parse error. PASS (function(){'use strict';1-(eval=1);}) threw exception SyntaxError: Parse error. PASS 'use strict';arguments=1; threw exception SyntaxError: Parse error. PASS (function(){'use strict';arguments=1;}) threw exception SyntaxError: Parse error. PASS 'use strict';1-(arguments=1); threw exception SyntaxError: Parse error. PASS (function(){'use strict';1-(arguments=1);}) threw exception SyntaxError: Parse error. PASS 'use strict';var a=(eval=1); threw exception SyntaxError: Parse error. PASS (function(){'use strict';var a=(eval=1);}) threw exception SyntaxError: Parse error. PASS 'use strict';var a=(arguments=1); threw exception SyntaxError: Parse error. PASS (function(){'use strict';var a=(arguments=1);}) threw exception SyntaxError: Parse error. PASS 'use strict'; try { throw 1; } catch (e) { aGlobal = true; } is true PASS 'use strict'; (function () { try { throw 1; } catch (e) { aGlobal = true; }})(); aGlobal; is true PASS (function () {'use strict'; try { throw 1; } catch (e) { aGlobal = true; }})(); aGlobal; is true PASS try { throw 1; } catch (e) { aGlobal = true; } is true PASS (function () { try { throw 1; } catch (e) { aGlobal = true; }})(); aGlobal; is true PASS (function () {try { throw 1; } catch (e) { aGlobal = true; }})(); aGlobal; is true PASS successfullyParsed is true TEST COMPLETE