Test some array functions on non-array objects. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS properties(['b', 'a']) is '0:b, 1:a, length:2(DontDelete, DontEnum)' PASS properties({ length:2, 0:'b', 1:'a' }) is '0:b, 1:a, length:2' PASS properties(new OneItemConstructor) is '0:a(FromPrototype), length:1(FromPrototype)' PASS properties(new TwoItemConstructor) is '0:b(FromPrototype), 1:a(FromPrototype), length:2(FromPrototype)' PASS Array.prototype.toString.call({}) threw exception TypeError: Type error. PASS Array.prototype.toLocaleString.call({}) threw exception TypeError: Type error. PASS Array.prototype.concat.call(x = { length:2, 0:'b', 1:'a' }) is [x] PASS Array.prototype.join.call({}) is '' PASS Array.prototype.join.call(['b', 'a']) is 'b,a' PASS Array.prototype.join.call({ length:2, 0:'b', 1:'a' }) is 'b,a' PASS Array.prototype.join.call(new TwoItemConstructor) is 'b,a' PASS Array.prototype.pop.call({}) is undefined PASS Array.prototype.pop.call({ length:2, 0:'b', 1:'a' }) is 'a' PASS Array.prototype.pop.call({ length:2, 0:'b', 1:'a' }) is 'a' PASS Array.prototype.pop.call(new TwoItemConstructor) is 'a' PASS Array.prototype.pop.call(x = {}); properties(x) is 'length:0' PASS Array.prototype.pop.call(x = ['b', 'a']); properties(x) is '0:b, length:1(DontDelete, DontEnum)' PASS Array.prototype.pop.call(x = { length:2, 0:'b', 1:'a' }); properties(x) is '0:b, length:1' PASS Array.prototype.pop.call(x = new TwoItemConstructor); properties(x) is '0:b(FromPrototype), 1:a(FromPrototype), length:1' PASS Array.prototype.push.call({}) is 0 PASS Array.prototype.push.call(['b', 'a']) is 2 PASS Array.prototype.push.call({ length:2, 0:'b', 1:'a' }) is 2 PASS Array.prototype.push.call(new TwoItemConstructor) is 2 PASS Array.prototype.push.call(x = {}); properties(x) is 'length:0' PASS Array.prototype.push.call(x = ['b', 'a']); properties(x) is '0:b, 1:a, length:2(DontDelete, DontEnum)' PASS Array.prototype.push.call(x = { length:2, 0:'b', 1:'a' }); properties(x) is '0:b, 1:a, length:2' PASS Array.prototype.push.call(x = new TwoItemConstructor); properties(x) is '0:b(FromPrototype), 1:a(FromPrototype), length:2' PASS Array.prototype.push.call({}, 'c') is 1 PASS Array.prototype.push.call(['b', 'a'], 'c') is 3 PASS Array.prototype.push.call({ length:2, 0:'b', 1:'a' }, 'c') is 3 PASS Array.prototype.push.call(new TwoItemConstructor, 'c') is 3 PASS Array.prototype.push.call(x = {}, 'c'); properties(x) is '0:c, length:1' PASS Array.prototype.push.call(x = ['b', 'a'], 'c'); properties(x) is '0:b, 1:a, 2:c, length:3(DontDelete, DontEnum)' PASS Array.prototype.push.call(x = { length:2, 0:'b', 1:'a' }, 'c'); properties(x) is '0:b, 1:a, 2:c, length:3' PASS Array.prototype.push.call(x = new TwoItemConstructor, 'c'); properties(x) is '0:b(FromPrototype), 1:a(FromPrototype), 2:c, length:3' PASS properties(Array.prototype.reverse.call({})) is '' PASS properties(Array.prototype.reverse.call(['b', 'a'])) is '0:a, 1:b, length:2(DontDelete, DontEnum)' PASS properties(Array.prototype.reverse.call({ length:2, 0:'b', 1:'a' })) is '0:a, 1:b, length:2' PASS properties(Array.prototype.reverse.call(new OneItemConstructor)) is '0:a(FromPrototype), length:1(FromPrototype)' PASS properties(Array.prototype.reverse.call(new TwoItemConstructor)) is '0:a, 1:b, length:2(FromPrototype)' PASS Array.prototype.shift.call({}) is undefined PASS Array.prototype.shift.call(['b', 'a']) is 'b' PASS Array.prototype.shift.call({ length:2, 0:'b', 1:'a' }) is 'b' PASS Array.prototype.shift.call(new TwoItemConstructor) is 'b' PASS Array.prototype.shift.call(x = {}); properties(x) is 'length:0' PASS Array.prototype.shift.call(x = ['b', 'a']); properties(x) is '0:a, length:1(DontDelete, DontEnum)' PASS Array.prototype.shift.call(x = { length:2, 0:'b', 1:'a' }); properties(x) is '0:a, length:1' PASS Array.prototype.shift.call(x = new TwoItemConstructor); properties(x) is '0:a, 1:a(FromPrototype), length:1' PASS Array.prototype.slice.call({}, 0, 1) is [] PASS Array.prototype.slice.call(['b', 'a'], 0, 1) is ['b'] PASS Array.prototype.slice.call({ length:2, 0:'b', 1:'a' }, 0, 1) is ['b'] PASS Array.prototype.slice.call(new TwoItemConstructor, 0, 1) is ['b'] PASS properties(Array.prototype.sort.call({})) is '' PASS properties(Array.prototype.sort.call(['b', 'a'])) is '0:a, 1:b, length:2(DontDelete, DontEnum)' PASS properties(Array.prototype.sort.call({ length:2, 0:'b', 1:'a' })) is '0:a, 1:b, length:2' PASS properties(Array.prototype.sort.call(new OneItemConstructor)) is '0:a(FromPrototype), length:1(FromPrototype)' PASS properties(Array.prototype.sort.call(new TwoItemConstructor)) is '0:a, 1:b, length:2(FromPrototype)' PASS Array.prototype.splice.call({}, 0, 1) is [] PASS Array.prototype.splice.call(['b', 'a'], 0, 1) is ['b'] PASS Array.prototype.splice.call({ length:2, 0:'b', 1:'a' }, 0, 1) is ['b'] PASS Array.prototype.splice.call(new TwoItemConstructor, 0, 1) is ['b'] PASS Array.prototype.splice.call(x = {}, 0, 1); properties(x) is 'length:0' PASS Array.prototype.splice.call(x = ['b', 'a'], 0, 1); properties(x) is '0:a, length:1(DontDelete, DontEnum)' PASS Array.prototype.splice.call(x = { length:2, 0:'b', 1:'a' }, 0, 1); properties(x) is '0:a, length:1' PASS Array.prototype.splice.call(x = new TwoItemConstructor, 0, 1); properties(x) is '0:a, 1:a(FromPrototype), length:1' PASS Array.prototype.unshift.call({}) is 0 PASS Array.prototype.unshift.call(['b', 'a']) is 2 PASS Array.prototype.unshift.call({ length:2, 0:'b', 1:'a' }) is 2 PASS Array.prototype.unshift.call(new TwoItemConstructor) is 2 PASS Array.prototype.unshift.call(x = {}); properties(x) is 'length:0' PASS Array.prototype.unshift.call(x = ['b', 'a']); properties(x) is '0:b, 1:a, length:2(DontDelete, DontEnum)' PASS Array.prototype.unshift.call(x = { length:2, 0:'b', 1:'a' }); properties(x) is '0:b, 1:a, length:2' PASS Array.prototype.unshift.call(x = new TwoItemConstructor); properties(x) is '0:b(FromPrototype), 1:a(FromPrototype), length:2' PASS Array.prototype.unshift.call({}, 'c') is 1 PASS Array.prototype.unshift.call(['b', 'a'], 'c') is 3 PASS Array.prototype.unshift.call({ length:2, 0:'b', 1:'a' }, 'c') is 3 PASS Array.prototype.unshift.call(new TwoItemConstructor, 'c') is 3 PASS Array.prototype.unshift.call(x = {}, 'c'); properties(x) is '0:c, length:1' PASS Array.prototype.unshift.call(x = ['b', 'a'], 'c'); properties(x) is '0:c, 1:b, 2:a, length:3(DontDelete, DontEnum)' PASS Array.prototype.unshift.call(x = { length:2, 0:'b', 1:'a' }, 'c'); properties(x) is '0:c, 1:b, 2:a, length:3' PASS Array.prototype.unshift.call(x = new TwoItemConstructor, 'c'); properties(x) is '0:c, 1:b, 2:a, length:3' PASS successfullyParsed is true TEST COMPLETE