JSTests/test262/test/built-ins/Array/prototype/concat/S15.4.4.4_A3_T1.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-array.prototype.concat
info: "[[Get]] from not an inherited property"
es5id: 15.4.4.4_A3_T1
description: >
    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
    of Array.prototype is Object.prototype
---*/

Array.prototype[1] = 1;
var x = [0];
x.length = 2;
var arr = x.concat();

//CHECK#1
if (arr[0] !== 0) {
  $ERROR('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; var arr = x.concat(); arr[0] === 0. Actual: ' + (arr[0]));
}

//CHECK#2
if (arr[1] !== 1) {
  $ERROR('#2: Array.prototype[1] = 1; x = [0]; x.length = 2; var arr = x.concat(); arr[1] === 1. Actual: ' + (arr[1]));
}

//CHECK#3
if (arr.hasOwnProperty('1') !== true) {
  $ERROR('#3: Array.prototype[1] = 1; x = [0]; x.length = 2; var arr = x.concat(); arr.hasOwnProperty(\'1\') === true. Actual: ' + (arr.hasOwnProperty('1')));
}

Object.prototype[1] = 1;
Object.prototype.length = 2;
Object.prototype.concat = Array.prototype.concat;
x = {0:0};
var arr = x.concat();

//CHECK#4
if (arr[0] !== x) {
  $ERROR('#4: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.concat = Array.prototype.concat; x = {0:0}; var arr = x.concat(); arr[0] === x. Actual: ' + (arr[0]));
}

//CHECK#5
if (arr[1] !== 1) {
  $ERROR('#5: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.concat = Array.prototype.concat; x = {0:0}; var arr = x.concat(); arr[1] === 1. Actual: ' + (arr[1]));
}

//CHECK#6
if (arr.hasOwnProperty('1') !== false) {
  $ERROR('#6: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.concat = Array.prototype.concat; x = {0:0}; var arr = x.concat(); arr.hasOwnProperty(\'1\') === false. Actual: ' + (arr.hasOwnProperty('1')));
}