| // 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__); |
| |
| assertEquals('Array Iterator', %_ClassOf(array[Symbol.iterator]())); |
| 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); |
| 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(); |