// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
'use strict';
(function TestDefaultConstructor() {
class Stack extends Array { }
{
let s1 = new Stack();
assertSame(Stack.prototype, s1.__proto__);
assertTrue(Array.isArray(s1));
assertSame(0, s1.length);
s1[0] = 'xyz';
assertSame(1, s1.length);
assertSame('xyz', s1[0]);
s1.push(42);
assertSame(2, s1.length);
assertSame('xyz', s1[0]);
assertSame(42, s1[1]);
}
{
let s2 = new Stack(10);
assertSame(Stack.prototype, s2.__proto__);
assertTrue(Array.isArray(s2));
assertSame(10, s2.length);
assertSame(undefined, s2[0]);
}
{
let a = [1,2,3];
let s3 = new Stack(a);
assertSame(Stack.prototype, s3.__proto__);
assertTrue(Array.isArray(s3));
assertSame(1, s3.length);
assertSame(a, s3[0]);
}
{
let s4 = new Stack(1, 2, 3);
assertSame(Stack.prototype, s4.__proto__);
assertTrue(Array.isArray(s4));
assertSame(3, s4.length);
assertSame(1, s4[0]);
assertSame(2, s4[1]);
assertSame(3, s4[2]);
}
{
let s5 = new Stack(undefined, undefined, undefined);
assertSame(Stack.prototype, s5.__proto__);
assertTrue(Array.isArray(s5));
assertSame(3, s5.length);
assertSame(undefined, s5[0]);
assertSame(undefined, s5[1]);
assertSame(undefined, s5[2]);
}
}());
(function TestEmptyArgsSuper() {
class Stack extends Array {
constructor() { super(); }
}
let s1 = new Stack();
assertSame(Stack.prototype, s1.__proto__);
assertTrue(Array.isArray(s1));
assertSame(0, s1.length);
s1[0] = 'xyz';
assertSame(1, s1.length);
assertSame('xyz', s1[0]);
s1.push(42);
assertSame(2, s1.length);
assertSame('xyz', s1[0]);
assertSame(42, s1[1]);
}());
(function TestOneArgSuper() {
class Stack extends Array {
constructor(x) {
super(x);
}
}
{
let s2 = new Stack(10, 'ignored arg');
assertSame(Stack.prototype, s2.__proto__);
assertTrue(Array.isArray(s2));
assertSame(10, s2.length);
assertSame(undefined, s2[0]);
}
{
let a = [1,2,3];
let s3 = new Stack(a, 'ignored arg');
assertSame(Stack.prototype, s3.__proto__);
assertTrue(Array.isArray(s3));
assertSame(1, s3.length);
assertSame(a, s3[0]);
}
}());
(function TestMultipleArgsSuper() {
class Stack extends Array {
constructor(x, y, z) {
super(x, y, z);
}
}
{
let s4 = new Stack(1, 2, 3, 4, 5);
assertSame(Stack.prototype, s4.__proto__);
assertTrue(Array.isArray(s4));
assertSame(3, s4.length);
assertSame(1, s4[0]);
assertSame(2, s4[1]);
assertSame(3, s4[2]);
}
{
let s5 = new Stack(undefined);
assertSame(Stack.prototype, s5.__proto__);
assertTrue(Array.isArray(s5));
assertTrue(s5.__proto__ == Stack.prototype);
assertSame(3, s5.length);
assertSame(undefined, s5[0]);
assertSame(undefined, s5[1]);
assertSame(undefined, s5[2]);
}
}());
(function TestArrayConcat() {
class Stack extends Array { }
let s1 = new Stack(1,2,3);
assertArrayEquals([1,2,3,4,5,6], s1.concat([4,5,6]));
assertArrayEquals([4,5,6,1,2,3], [4,5,6].concat(s1));
}());
(function TestJSONStringify() {
class Stack extends Array { }
let s1 = new Stack(1,2,3);
assertSame("[1,2,3]", JSON.stringify(s1));
}());