v8/test/mjsunit/harmony/array-iterator.js

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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: --harmony-iteration --allow-natives-syntax
function TestArrayPrototype() {
assertTrue(Array.prototype.hasOwnProperty('entries'));
assertTrue(Array.prototype.hasOwnProperty('values'));
assertTrue(Array.prototype.hasOwnProperty('keys'));
assertFalse(Array.prototype.propertyIsEnumerable('entries'));
assertFalse(Array.prototype.propertyIsEnumerable('values'));
assertFalse(Array.prototype.propertyIsEnumerable('keys'));
}
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 ArrayIterator = iterator.constructor;
assertEquals(ArrayIterator.prototype, array.values().__proto__);
assertEquals(ArrayIterator.prototype, array.keys().__proto__);
assertEquals(ArrayIterator.prototype, array.entries().__proto__);
assertEquals(Object.prototype, ArrayIterator.prototype.__proto__);
assertEquals('Array Iterator', %_ClassOf(array.values()));
assertEquals('Array Iterator', %_ClassOf(array.keys()));
assertEquals('Array Iterator', %_ClassOf(array.entries()));
var prototypeDescriptor =
Object.getOwnPropertyDescriptor(ArrayIterator, 'prototype');
assertFalse(prototypeDescriptor.configurable);
assertFalse(prototypeDescriptor.enumerable);
assertFalse(prototypeDescriptor.writable);
}
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++) {
assertEquals(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++) {
assertEquals(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();