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// 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: --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, 'keys', DONT_ENUM);
assertHasOwnProperty(Array.prototype, Symbol.iterator, DONT_ENUM);
assertEquals('entries', Array.prototype.entries.name);
assertEquals('keys', Array.prototype.keys.name);
assertEquals('values', Array.prototype[Symbol.iterator].name);
}
TestArrayPrototype();
function assertIteratorResult(value, done, result) {
assertEquals({value: value, done: done}, result);
}
function TestValues() {
var array = ['a', 'b', 'c'];
var iterator = array[Symbol.iterator]();
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[Symbol.iterator]();
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.keys();
var ArrayIteratorPrototype = iterator.__proto__;
assertEquals(ArrayIteratorPrototype, array[Symbol.iterator]().__proto__);
assertEquals(ArrayIteratorPrototype, array.keys().__proto__);
assertEquals(ArrayIteratorPrototype, array.entries().__proto__);
assertEquals(Object.prototype, ArrayIteratorPrototype.__proto__);
assertFalse(ArrayIteratorPrototype.hasOwnProperty('constructor'));
assertArrayEquals(['next'],
Object.getOwnPropertyNames(ArrayIteratorPrototype));
assertHasOwnProperty(ArrayIteratorPrototype, 'next', DONT_ENUM);
assertFalse(ArrayIteratorPrototype.hasOwnProperty(Symbol.iterator));
assertEquals("[object Array Iterator]",
Object.prototype.toString.call(iterator));
assertEquals("Array Iterator", ArrayIteratorPrototype[Symbol.toStringTag]);
var desc = Object.getOwnPropertyDescriptor(
ArrayIteratorPrototype, Symbol.toStringTag);
assertTrue(desc.configurable);
assertFalse(desc.writable);
assertEquals("Array Iterator", desc.value);
}
TestArrayIteratorPrototype();
function TestForArrayValues() {
var buffer = [];
var array = [0, 'a', true, false, null, /* hole */, undefined, NaN];
var i = 0;
for (var value of array[Symbol.iterator]()) {
buffer[i++] = value;
}
assertEquals(8, buffer.length);
for (var i = 0; i < buffer.length; i++) {
assertSame(array[i], buffer[i]);
}
}
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; i++) {
assertSame(array[i], buffer[i][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; i++) {
assertSame(array[i], buffer[i]);
}
}
TestForArrayValues();
function TestNonOwnSlots() {
var array = [0];
var iterator = array[Symbol.iterator]();
var object = {__proto__: iterator};
assertThrows(function() {
object.next();
}, TypeError);
}
TestNonOwnSlots();
function TestForDictionaryArray() {
var array = [];
array[1024] = 'c';
assertTrue(%HasDictionaryElements(array));
var iterator = array[Symbol.iterator]();
for (var i = 0; i < 1024; ++i) {
assertIteratorResult(void 0, false, iterator.next());
}
assertIteratorResult('c', false, iterator.next());
assertIteratorResult(void 0, true, iterator.next());
}
TestForDictionaryArray();