Enable ES6 iteration by default

test/mjsunit/harmony/array-iterator.js

-// Copyright 2013 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --harmony-iteration --allow-natives-syntax
-
-
-var NONE = 0;
-var READ_ONLY = 1;
-var DONT_ENUM = 2;
-var DONT_DELETE = 4;
-
-
-function assertHasOwnProperty(object, name, attrs) {
-  assertTrue(object.hasOwnProperty(name));
-  var desc = Object.getOwnPropertyDescriptor(object, name);
-  assertEquals(desc.writable, !(attrs & READ_ONLY));
-  assertEquals(desc.enumerable, !(attrs & DONT_ENUM));
-  assertEquals(desc.configurable, !(attrs & DONT_DELETE));
-}
-
-
-function TestArrayPrototype() {
-  assertHasOwnProperty(Array.prototype, 'entries', DONT_ENUM);
-  assertHasOwnProperty(Array.prototype, 'values', DONT_ENUM);
-  assertHasOwnProperty(Array.prototype, 'keys', DONT_ENUM);
-  assertHasOwnProperty(Array.prototype, Symbol.iterator, DONT_ENUM);
-
-  assertEquals(Array.prototype.values, Array.prototype[Symbol.iterator]);
-}
-TestArrayPrototype();
-
-
-function assertIteratorResult(value, done, result) {
-  assertEquals({value: value, done: done}, result);
-}
-
-
-function TestValues() {
-  var array = ['a', 'b', 'c'];
-  var iterator = array.values();
-  assertIteratorResult('a', false, iterator.next());
-  assertIteratorResult('b', false, iterator.next());
-  assertIteratorResult('c', false, iterator.next());
-  assertIteratorResult(void 0, true, iterator.next());
-
-  array.push('d');
-  assertIteratorResult(void 0, true, iterator.next());
-}
-TestValues();
-
-
-function TestValuesMutate() {
-  var array = ['a', 'b', 'c'];
-  var iterator = array.values();
-  assertIteratorResult('a', false, iterator.next());
-  assertIteratorResult('b', false, iterator.next());
-  assertIteratorResult('c', false, iterator.next());
-  array.push('d');
-  assertIteratorResult('d', false, iterator.next());
-  assertIteratorResult(void 0, true, iterator.next());
-}
-TestValuesMutate();
-
-
-function TestKeys() {
-  var array = ['a', 'b', 'c'];
-  var iterator = array.keys();
-  assertIteratorResult(0, false, iterator.next());
-  assertIteratorResult(1, false, iterator.next());
-  assertIteratorResult(2, false, iterator.next());
-  assertIteratorResult(void 0, true, iterator.next());
-
-  array.push('d');
-  assertIteratorResult(void 0, true, iterator.next());
-}
-TestKeys();
-
-
-function TestKeysMutate() {
-  var array = ['a', 'b', 'c'];
-  var iterator = array.keys();
-  assertIteratorResult(0, false, iterator.next());
-  assertIteratorResult(1, false, iterator.next());
-  assertIteratorResult(2, false, iterator.next());
-  array.push('d');
-  assertIteratorResult(3, false, iterator.next());
-  assertIteratorResult(void 0, true, iterator.next());
-}
-TestKeysMutate();
-
-
-function TestEntries() {
-  var array = ['a', 'b', 'c'];
-  var iterator = array.entries();
-  assertIteratorResult([0, 'a'], false, iterator.next());
-  assertIteratorResult([1, 'b'], false, iterator.next());
-  assertIteratorResult([2, 'c'], false, iterator.next());
-  assertIteratorResult(void 0, true, iterator.next());
-
-  array.push('d');
-  assertIteratorResult(void 0, true, iterator.next());
-}
-TestEntries();
-
-
-function TestEntriesMutate() {
-  var array = ['a', 'b', 'c'];
-  var iterator = array.entries();
-  assertIteratorResult([0, 'a'], false, iterator.next());
-  assertIteratorResult([1, 'b'], false, iterator.next());
-  assertIteratorResult([2, 'c'], false, iterator.next());
-  array.push('d');
-  assertIteratorResult([3, 'd'], false, iterator.next());
-  assertIteratorResult(void 0, true, iterator.next());
-}
-TestEntriesMutate();
-
-
-function TestArrayIteratorPrototype() {
-  var array = [];
-  var iterator = array.values();
-
-  var ArrayIteratorPrototype = iterator.__proto__;
-
-  assertEquals(ArrayIteratorPrototype, array.values().__proto__);
-  assertEquals(ArrayIteratorPrototype, array.keys().__proto__);
-  assertEquals(ArrayIteratorPrototype, array.entries().__proto__);
-
-  assertEquals(Object.prototype, ArrayIteratorPrototype.__proto__);
-
-  assertEquals('Array Iterator', %_ClassOf(array.values()));
-  assertEquals('Array Iterator', %_ClassOf(array.keys()));
-  assertEquals('Array Iterator', %_ClassOf(array.entries()));
-
-  assertFalse(ArrayIteratorPrototype.hasOwnProperty('constructor'));
-  assertArrayEquals(['next'],
-      Object.getOwnPropertyNames(ArrayIteratorPrototype));
-  assertHasOwnProperty(ArrayIteratorPrototype, 'next', DONT_ENUM);
-  assertHasOwnProperty(ArrayIteratorPrototype, Symbol.iterator, DONT_ENUM);
-}
-TestArrayIteratorPrototype();
-
-
-function TestForArrayValues() {
-  var buffer = [];
-  var array = [0, 'a', true, false, null, /* hole */, undefined, NaN];
-  var i = 0;
-  for (var value of array.values()) {
-    buffer[i++] = value;
-  }
-
-  assertEquals(8, buffer.length);
-
-  for (var i = 0; i < buffer.length - 1; i++) {
-    assertSame(array[i], buffer[i]);
-  }
-  assertTrue(isNaN(buffer[buffer.length - 1]));
-}
-TestForArrayValues();
-
-
-function TestForArrayKeys() {
-  var buffer = [];
-  var array = [0, 'a', true, false, null, /* hole */, undefined, NaN];
-  var i = 0;
-  for (var key of array.keys()) {
-    buffer[i++] = key;
-  }
-
-  assertEquals(8, buffer.length);
-
-  for (var i = 0; i < buffer.length; i++) {
-    assertEquals(i, buffer[i]);
-  }
-}
-TestForArrayKeys();
-
-
-function TestForArrayEntries() {
-  var buffer = [];
-  var array = [0, 'a', true, false, null, /* hole */, undefined, NaN];
-  var i = 0;
-  for (var entry of array.entries()) {
-    buffer[i++] = entry;
-  }
-
-  assertEquals(8, buffer.length);
-
-  for (var i = 0; i < buffer.length - 1; i++) {
-    assertSame(array[i], buffer[i][1]);
-  }
-  assertTrue(isNaN(buffer[buffer.length - 1][1]));
-
-  for (var i = 0; i < buffer.length; i++) {
-    assertEquals(i, buffer[i][0]);
-  }
-}
-TestForArrayEntries();
-
-
-function TestForArray() {
-  var buffer = [];
-  var array = [0, 'a', true, false, null, /* hole */, undefined, NaN];
-  var i = 0;
-  for (var value of array) {
-    buffer[i++] = value;
-  }
-
-  assertEquals(8, buffer.length);
-
-  for (var i = 0; i < buffer.length - 1; i++) {
-    assertSame(array[i], buffer[i]);
-  }
-  assertTrue(isNaN(buffer[buffer.length - 1]));
-}
-TestForArrayValues();
-
-
-function TestNonOwnSlots() {
-  var array = [0];
-  var iterator = array.values();
-  var object = {__proto__: iterator};
-
-  assertThrows(function() {
-    object.next();
-  }, TypeError);
-}
-TestNonOwnSlots();