Import tests from Google V8 (native iterators)

These tests are derived from the following files within the Google V8
project:

    test/mjsunit/es6/typed-array-iterator.js
    test/mjsunit/es6/arguments-iterator.js
    test/mjsunit/es6/string-iterator.js
    test/mjsunit/es6/collection-iterator.js

test/built-ins/Array/prototype/Symbol.iterator/next-iteration-mutable.js

@@ -6,8 +6,8 @@
       When an item is added to the array after the iterator is created but
       before the iterator is "done" (as defined by 22.1.5.2.1), the new item
       should be accessible via iteration. When an item is added to the array
-      after the iterator is is "done", the new item should not be accessible
+      after the iterator is "done", the new item should not be accessible via
-      via iteration.
+      iteration.
   es6id: 22.1.3.30
  ---*/
 

test/built-ins/Array/prototype/keys/iteration-mutable.js

@@ -6,7 +6,7 @@
       When an item is added to the array after the iterator is created but
       before the iterator is "done" (as defined by 22.1.5.2.1), the new item's
       key should be accessible via iteration. When an item is added to the
-      array after the iterator is is "done", the new item's key should not be
+      array after the iterator is "done", the new item's key should not be
       accessible via iteration.
   es6id: 22.1.3.13
  ---*/

test/built-ins/Float32Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Float32Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Float64Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Float64Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Int16Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Int16Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Int32Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Int32Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Int8Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Int8Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/Symbol.iterator-Symbol.toStringTag-property-descriptor.js

@@ -0,0 +1,18 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      `Object.prototype.getOwnPropertyDescriptor` should reflect the value and
+      writability of the @@toStringTag attribute.
+  includes: [propertyHelper.js]
+  es6id: 23.1.3.13
+ ---*/
+
+var MapIteratorProto = Object.getPrototypeOf(new Map()[Symbol.iterator]());
+
+assert.sameValue('Map Iterator', MapIteratorProto[Symbol.toStringTag]);
+
+verifyNotEnumerable(MapIteratorProto, Symbol.toStringTag);
+verifyNotWritable(MapIteratorProto, Symbol.toStringTag);
+verifyConfigurable(MapIteratorProto, Symbol.toStringTag);

test/built-ins/Map/prototype/Symbol.iterator-next-iteration-mutable.js

@@ -0,0 +1,52 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      When an item is added to the map after the iterator is created but before
+      the iterator is "done" (as defined by 23.1.5.2.1), the new item should be
+      accessible via iteration. When an item is added to the map after the
+      iterator is "done", the new item should not be accessible via iteration.
+  es6id: 23.1.3.12
+ ---*/
+
+var map = new Map();
+map.set(1, 11);
+map.set(2, 22);
+
+var iterator = map[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value[0], 1, 'First result `value` (map key)');
+assert.sameValue(result.value[1], 11, 'First result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'First result `value` (length)');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+map.set(3, 33);
+
+result = iterator.next();
+assert.sameValue(result.value[0], 2, 'Second result `value` (map key)');
+assert.sameValue(result.value[1], 22, 'Second result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'Second result `value` (length)');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 3, 'Third result `value` (map key)');
+assert.sameValue(result.value[1], 33, 'Third result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'Third result `value` (length)');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+map.set(4, 44);
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/Symbol.iterator-next-iteration.js

@@ -0,0 +1,47 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.2.3.11
+ ---*/
+
+var map = new Map();
+map.set(1, 11);
+map.set(2, 22);
+map.set(3, 33);
+
+var iterator = map[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value[0], 1, 'First result `value` (map key)');
+assert.sameValue(result.value[1], 11, 'First result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'First result `value` (length)');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 2, 'Second result `value` (map key)');
+assert.sameValue(result.value[1], 22, 'Second result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'Second result `value` (length)');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 3, 'Third result `value` (map key)');
+assert.sameValue(result.value[1], 33, 'Third result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'Third result `value` (length)');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/Symbol.iterator-next-no-map-data.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[MapData]] internal slot, throw a
+      TypeError exception as per 23.1.5.1.
+  es6id: 23.1.3.12
+ ---*/
+
+var iterator = new Map()[Symbol.iterator]();
+
+assert.throws(TypeError, function() {
+  iterator.next.call({});
+});

test/built-ins/Map/prototype/Symbol.iterator-property-descriptor.js

@@ -0,0 +1,14 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should exist on the Map prototype, and it should be writable
+      and configurable, but not enumerable.
+  includes: [propertyHelper.js]
+  es6id: 23.1.3.12
+ ---*/
+
+verifyNotEnumerable(Map.prototype, Symbol.iterator);
+verifyWritable(Map.prototype, Symbol.iterator);
+verifyConfigurable(Map.prototype, Symbol.iterator);

test/built-ins/Map/prototype/entries-iteration.js

@@ -0,0 +1,47 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.1.3.4
+ ---*/
+
+var map = new Map();
+map.set(1, 11);
+map.set(2, 22);
+map.set(3, 33);
+
+var iterator = map.entries();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value[0], 1, 'First result `value` (map key)');
+assert.sameValue(result.value[1], 11, 'First result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'First result `value` (length)');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 2, 'Second result `value` (map key)');
+assert.sameValue(result.value[1], 22, 'Second result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'Second result `value` (length)');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 3, 'Third result `value` (map key)');
+assert.sameValue(result.value[1], 33, 'Third result `value` (map value)');
+assert.sameValue(result.value.length, 2, 'Third result `value` (length)');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/entries-no-map-data.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[MapData]] internal slot, throw a
+      TypeError exception as per 23.1.5.1.
+  es6id: 23.1.3.4
+ ---*/
+
+assert.throws(TypeError, function() {
+  Map.prototype.entries.call({});
+});

test/built-ins/Map/prototype/keys-iteration.js

@@ -0,0 +1,41 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.1.3.8
+ ---*/
+
+var map = new Map();
+map.set(1, 11);
+map.set(2, 22);
+map.set(3, 33);
+
+var iterator = map.keys();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/keys-no-map-data.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[MapData]] internal slot, throw a
+      TypeError exception as per 23.1.5.1.
+  es6id: 23.1.3.8
+ ---*/
+
+assert.throws(TypeError, function() {
+  Map.prototype.keys.call({});
+});

test/built-ins/Map/prototype/values-iteration-mutable.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      When an item is added to the map after the iterator is created but before
+      the iterator is "done" (as defined by 23.1.5.2.1), the new item should be
+      accessible via iteration. When an item is added to the map after the
+      iterator is "done", the new item should not be accessible via iteration.
+  es6id: 23.1.3.11
+ ---*/
+
+var map = new Map();
+map.set(1, 11);
+map.set(2, 22);
+
+var iterator = map.values();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 11, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+map.set(3, 33);
+
+result = iterator.next();
+assert.sameValue(result.value, 22, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 33, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+map.set(4, 44);
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/values-iteration.js

@@ -0,0 +1,41 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.1.3.11
+ ---*/
+
+var map = new Map();
+map.set(1, 11);
+map.set(2, 22);
+map.set(3, 33);
+
+var iterator = map.values();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 11, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 22, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 33, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Map/prototype/values-no-map-data.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[MapData]] internal slot, throw a
+      TypeError exception as per 23.1.5.1.
+  es6id: 23.1.3.4
+ ---*/
+
+assert.throws(TypeError, function() {
+  Map.prototype.values.call({});
+});

test/built-ins/Set/prototype/Symbol.iterator-Symbol.toStringTag-property-descriptor.js

@@ -0,0 +1,18 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      `Object.prototype.getOwnPropertyDescriptor` should reflect the value and
+      writability of the @@toStringTag attribute.
+  includes: [propertyHelper.js]
+  es6id: 23.2.3.12
+ ---*/
+
+var SetIteratorProto = Object.getPrototypeOf(new Set()[Symbol.iterator]());
+
+assert.sameValue('Set Iterator', SetIteratorProto[Symbol.toStringTag]);
+
+verifyNotEnumerable(SetIteratorProto, Symbol.toStringTag);
+verifyNotWritable(SetIteratorProto, Symbol.toStringTag);
+verifyConfigurable(SetIteratorProto, Symbol.toStringTag);

test/built-ins/Set/prototype/Symbol.iterator-next-iteration-mutable.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      When an item is added to the set after the iterator is created but before
+      the iterator is "done" (as defined by 23.2.5.2.1), the new item should be
+      accessible via iteration. When an item is added to the set after the
+      iterator is "done", the new item should not be accessible via iteration.
+  es6id: 23.2.3.11
+ ---*/
+
+var set = new Set();
+set.add(1);
+set.add(2);
+
+var iterator = set[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+set.add(3);
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+set.add(4);
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Set/prototype/Symbol.iterator-next-iteration.js

@@ -0,0 +1,41 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.2.3.11
+ ---*/
+
+var set = new Set();
+set.add(1);
+set.add(2);
+set.add(3);
+
+var iterator = set[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Set/prototype/Symbol.iterator-next-no-set-data.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[SetData]] internal slot, throw a
+      TypeError exception as per 23.2.5.1.
+  es6id: 23.2.3.11
+ ---*/
+
+var iterator = new Set()[Symbol.iterator]();
+
+assert.throws(TypeError, function() {
+  iterator.next.call({});
+});

test/built-ins/Set/prototype/Symbol.iterator-property-descriptor.js

@@ -0,0 +1,14 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should exist on the Array prototype, and it should be writable
+      and configurable, but not enumerable.
+  includes: [propertyHelper.js]
+  es6id: 23.2.3.11
+ ---*/
+
+verifyNotEnumerable(Set.prototype, Symbol.iterator);
+verifyWritable(Set.prototype, Symbol.iterator);
+verifyConfigurable(Set.prototype, Symbol.iterator);

test/built-ins/Set/prototype/entries-iteration.js

@@ -0,0 +1,47 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.2.3.5
+ ---*/
+
+var set = new Set();
+set.add(1);
+set.add(2);
+set.add(3);
+
+var iterator = set.entries();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value[0], 1, 'First result `value` ("key")');
+assert.sameValue(result.value[1], 1, 'First result `value` ("value")');
+assert.sameValue(result.value.length, 2, 'First result `value` (length)');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 2, 'Second result `value` ("key")');
+assert.sameValue(result.value[1], 2, 'Second result `value` ("value")');
+assert.sameValue(result.value.length, 2, 'Second result `value` (length)');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value[0], 3, 'Third result `value` ("key")');
+assert.sameValue(result.value[1], 3, 'Third result `value` ("value")');
+assert.sameValue(result.value.length, 2, 'Third result `value` (length)');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Set/prototype/entries-no-set-data.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[SetData]] internal slot, throw a
+      TypeError exception as per 23.2.5.1.
+  es6id: 23.2.3.5
+ ---*/
+
+assert.throws(TypeError, function() {
+  Set.prototype.entries.call({});
+});

test/built-ins/Set/prototype/keys.js

@@ -0,0 +1,11 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The initial value of the keys property is the same function object as the
+      initial value of the values property.
+  es6id: 23.2.3.8
+ ---*/
+
+assert.sameValue(Set.prototype.keys, Set.prototype.values);

test/built-ins/Set/prototype/values-iteration-mutable.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      When an item is added to the set after the iterator is created but before
+      the iterator is "done" (as defined by 23.2.5.2.1), the new item should be
+      accessible via iteration. When an item is added to the array after the
+      iterator is "done", the new item should not be accessible via iteration.
+  es6id: 23.2.3.10
+ ---*/
+
+var set = new Set();
+set.add(1);
+set.add(2);
+
+var iterator = set.values();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+set.add(3);
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+set.add(4);
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Set/prototype/values-iteration.js

@@ -0,0 +1,41 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator with the context as the
+      IteratedObject.
+  es6id: 23.2.3.10
+ ---*/
+
+var set = new Set();
+set.add(1);
+set.add(2);
+set.add(3);
+
+var iterator = set.values();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/Set/prototype/values-no-set-data.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      If the context does not have a [[SetData]] internal slot, throw a
+      TypeError exception as per 23.2.5.1.
+  es6id: 23.2.3.10
+ ---*/
+
+assert.throws(TypeError, function() {
+  Set.prototype.values.call({});
+});

test/built-ins/String/prototype/Symbol.iterator/Symbol.toStringTag.js

@@ -0,0 +1,18 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.5.2.1
+description: >
+    The initial value of the @@toStringTag property is the string value "String
+    Iterator". This property has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+var StringIteratorProto = Object.getPrototypeOf(''[Symbol.iterator]());
+
+assert.sameValue(StringIteratorProto[Symbol.toStringTag], 'String Iterator');
+
+verifyNotEnumerable(StringIteratorProto, Symbol.toStringTag);
+verifyNotWritable(StringIteratorProto, Symbol.toStringTag);
+verifyConfigurable(StringIteratorProto, Symbol.toStringTag);

test/built-ins/String/prototype/Symbol.iterator/ancestry.js

@@ -0,0 +1,15 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.5.2
+description: >
+    The [[Prototype]] internal slot ofthe %StringIteratorPrototype% is the
+    %IteratorPrototype% intrinsic object (25.1.2).
+---*/
+
+var strItrProto = Object.getPrototypeOf(''[Symbol.iterator]());
+var itrProto = Object.getPrototypeOf(
+  Object.getPrototypeOf([][Symbol.iterator]())
+);
+
+assert.sameValue(Object.getPrototypeOf(strItrProto), itrProto);

test/built-ins/String/prototype/Symbol.iterator/next-iteration-surrogate-pairs.js

@@ -0,0 +1,83 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.5.2.1
+description: >
+    Iteration should respect UTF-16-encoded Unicode code points specified via
+    surrogate pairs.
+---*/
+
+var lo = '\uD834';
+var hi = '\uDF06';
+var pair = lo + hi;
+var string = 'a' + pair + 'b' + lo + pair + hi + lo;
+var iterator = string[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 'a', 'First normal code point `value`');
+assert.sameValue(result.done, false, 'First normal code point `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, pair, 'Surrogate pair `value` (between normal code points)'
+);
+assert.sameValue(
+  result.done, false, 'Surrogate pair `done` flag (between normal code points)'
+);
+
+result = iterator.next();
+assert.sameValue(result.value, 'b', 'Second normal code point `value`');
+assert.sameValue(result.done, false, 'Second normal code point `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value,
+  lo,
+  'Lone lower code point `value` (following normal code point)'
+);
+assert.sameValue(
+  result.done,
+  false,
+  'Lone lower code point `done` flag (following normal code point)'
+);
+
+result = iterator.next();
+assert.sameValue(
+  result.value,
+  pair,
+  'Surrogate pair `value` (between lone lower- and upper- code points)'
+);
+assert.sameValue(
+  result.done,
+  false,
+  'Surrogate pair `done` flag (between lone lower- and upper- code points)'
+);
+
+result = iterator.next();
+assert.sameValue(result.value, hi, 'Lone upper code point `value`');
+assert.sameValue(result.done, false, 'Lone upper code point `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value,
+  lo,
+  'Lone lower code point `value` (following lone upper code point)'
+);
+assert.sameValue(
+  result.done,
+  false,
+  'Lone lower code point `done` flag (following lone upper code point)'
+);
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request'
+);

test/built-ins/String/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.5.2.1
+description: >
+    Iteration should visit each UTF-8 code point exactly once.
+---*/
+
+var string = "abc";
+var iterator = string[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 'a', 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 'b', 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 'c', 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/built-ins/String/prototype/Symbol.iterator/next-missing-internal-slots.js

@@ -0,0 +1,15 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 21.1.5.2.1 S 3
+description: >
+    If the `this` value does not have all of the internal slots of an String
+    Iterator Instance (21.1.5.3), throw a `TypeError` exception.
+---*/
+
+var iterator = ''[Symbol.iterator]();
+var object = Object.create(iterator);
+
+assert.throws(TypeError, function() {
+  object.next();
+});

test/built-ins/Uint16Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Uint16Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Uint32Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Uint32Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Uint8Array/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Uint8Array([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'first result `value`');
+assert.sameValue(result.done, false, 'first result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'second result `value`');
+assert.sameValue(result.done, false, 'second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'third result `value`');
+assert.sameValue(result.done, false, 'third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'exhausted result `value`');
+assert.sameValue(result.done, true, 'exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'exhausted result `done` flag (repeated request)'
+);

test/built-ins/Uint8ClampedArray/prototype/Symbol.iterator/next-iteration.js

@@ -0,0 +1,35 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.5.2.1
+description: >
+    Visits each element of the array in order and ceases iteration once all
+    values have been visited.
+---*/
+var array = new Uint8ClampedArray([3, 1, 2]);
+var iterator = array[Symbol.iterator]();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 3, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);

test/language/arguments-object/mapped/Symbol.iterator/next-expansion-after-exhaustion.js

@@ -0,0 +1,26 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.7 S22
+description: >
+    Once exhausted, iterators for mapped arguments exotic objects should not
+    emit new values added to the object.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  iterator.next();
+  iterator.next();
+  iterator.next();
+  iterator.next();
+
+  arguments[3] = 4;
+  arguments.length = 4;
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/mapped/Symbol.iterator/next-expansion-before-exhaustion.js

@@ -0,0 +1,29 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.7 S22
+description: >
+    Prior to being exhausted, iterators for mapped arguments exotic objects
+    should honor the insertion of additional argument values.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  iterator.next();
+  iterator.next();
+
+  arguments.length = 4;
+  arguments[3] = 5;
+
+  result = iterator.next();
+  result = iterator.next();
+  assert.sameValue(result.value, 5, 'New result `value`');
+  assert.sameValue(result.done, false, 'New result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/mapped/Symbol.iterator/next-iteration.js

@@ -0,0 +1,30 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.7 S22
+description: >
+    Mapped arguments exotic objects should implement the Array iterator
+    protocol.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  result = iterator.next();
+  assert.sameValue(result.value, 2, 'First result `value`');
+  assert.sameValue(result.done, false, 'First result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, 1, 'Second result `value`');
+  assert.sameValue(result.done, false, 'Second result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, 3, 'Third result `value`');
+  assert.sameValue(result.done, false, 'Third result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/mapped/Symbol.iterator/next-truncation-before-exhaustion.js

@@ -0,0 +1,23 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.7 S22
+description: >
+    Prior to being exhausted, iterators for mapped arguments exotic objects
+    should honor argument removal.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  iterator.next();
+  iterator.next();
+
+  arguments.length = 2;
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/mapped/Symbol.iterator/property-descriptor.js

@@ -0,0 +1,20 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.7 S22
+description: >
+    Mapped arguments exotic objects should implement the Array iterator
+    protocol.
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function() {
+  var descriptor = Object.getOwnPropertyDescriptor(arguments, Symbol.iterator);
+
+  assert.sameValue(arguments[Symbol.iterator], [][Symbol.iterator]);
+
+  verifyNotEnumerable(Array.prototype, Symbol.iterator);
+  verifyWritable(Array.prototype, Symbol.iterator);
+  verifyConfigurable(Array.prototype, Symbol.iterator);
+}());

test/language/arguments-object/unmapped/Symbol.iterator/next-expansion-after-exhaustion.js

@@ -0,0 +1,27 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.6 S7
+description: >
+    Once exhausted, iterators for unmapped arguments exotic objects should not
+    emit new values added to the object.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  'use strict';
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  iterator.next();
+  iterator.next();
+  iterator.next();
+  iterator.next();
+
+  arguments[3] = 4;
+  arguments.length = 4;
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/unmapped/Symbol.iterator/next-expansion-before-exhaustion.js

@@ -0,0 +1,30 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.6 S7
+description: >
+    Prior to being exhausted, iterators for unmapped arguments exotic objects
+    should honor the insertion of additional argument values.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  'use strict';
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  iterator.next();
+  iterator.next();
+
+  arguments.length = 4;
+  arguments[3] = 5;
+
+  result = iterator.next();
+  result = iterator.next();
+  assert.sameValue(result.value, 5, 'New result `value`');
+  assert.sameValue(result.done, false, 'New result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/unmapped/Symbol.iterator/next-iteration.js

@@ -0,0 +1,31 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.6 S7
+description: >
+    Unmapped arguments exotic objects should implement the Array iterator
+    protocol.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  'use strict';
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  result = iterator.next();
+  assert.sameValue(result.value, 2, 'First result `value`');
+  assert.sameValue(result.done, false, 'First result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, 1, 'Second result `value`');
+  assert.sameValue(result.done, false, 'Second result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, 3, 'Third result `value`');
+  assert.sameValue(result.done, false, 'Third result `done` flag');
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/unmapped/Symbol.iterator/next-truncation-before-exhaustion.js

@@ -0,0 +1,24 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.6 S7
+description: >
+    Prior to being exhausted, iterators for unmapped arguments exotic objects
+    should honor argument removal.
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  'use strict';
+  var iterator = arguments[Symbol.iterator]();
+  var result;
+
+  iterator.next();
+  iterator.next();
+
+  arguments.length = 2;
+
+  result = iterator.next();
+  assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+  assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+}(2, 1, 3));

test/language/arguments-object/unmapped/Symbol.iterator/property-descriptor.js

@@ -0,0 +1,21 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 9.4.4.6 S7
+description: >
+    Unmapped arguments exotic objects should implement the Array iterator
+    protocol.
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function() {
+  'use strict';
+  var descriptor = Object.getOwnPropertyDescriptor(arguments, Symbol.iterator);
+
+  assert.sameValue(arguments[Symbol.iterator], [][Symbol.iterator]);
+
+  verifyNotEnumerable(Array.prototype, Symbol.iterator);
+  verifyWritable(Array.prototype, Symbol.iterator);
+  verifyConfigurable(Array.prototype, Symbol.iterator);
+}());

test/language/for-of/arguments-object-aliasing.js

@@ -0,0 +1,26 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 13.6.4
+description: >
+    Arguments objects should be able to be traversed using a `for..of` loop,
+    and dynamic changes to their contents should be reflected in the iterated
+    values.
+flags: [noStrict]
+---*/
+
+var expected = [1, 3, 1];
+var i = 0;
+
+(function(a, b, c) {
+  for (var value of arguments) {
+    a = b;
+    b = c;
+    c = i;
+    assert.sameValue(value, expected[i], 'argument at index ' + i);
+    i++;
+  }
+
+}(1, 2, 3));
+
+assert.sameValue(i, 3, 'Visits all arguments');

test/language/for-of/arguments-object-mutation.js

@@ -0,0 +1,22 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 13.6.4
+description: >
+    Arguments objects should be able to be traversed using a `for..of` loop,
+    and dynamic changes to their contents should be reflected in the iterated
+    values.
+---*/
+
+var expected = [1, 4, 6];
+var i = 0;
+
+(function() {
+  for (var value of arguments) {
+    assert.sameValue(value, expected[i], 'argument at index ' + i);
+    i++;
+    arguments[i] *= 2;
+  }
+}(1, 2, 3));
+
+assert.sameValue(i, 3, 'Visits all arguments');

test/language/for-of/arguments-object.js

@@ -0,0 +1,18 @@
+// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 13.6.4
+description: >
+    Arguments objects should be able to be traversed using a `for..of` loop.
+---*/
+
+var i = 0;
+
+(function() {
+  for (var value of arguments) {
+    assert.sameValue(value, arguments[i], 'argument at index ' + i);
+    i++;
+  }
+}(0, 'a', true, false, null, undefined, NaN));
+
+assert.sameValue(i, 7, 'Visits all arguments');