JSTests/test262/test/built-ins/Array/prototype/shift/S15.4.4.9_A1.1_T1.js

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

/*---
info: |
    If length equal zero, call the [[Put]] method of this object
    with arguments "length" and 0 and return undefined
esid: sec-array.prototype.shift
description: Checking this algorithm
---*/

//CHECK#1
var x = new Array();
var shift = x.shift();
if (shift !== undefined) {
  $ERROR('#1: var x = new Array(); x.shift() === undefined. Actual: ' + (shift));
}

//CHECK#2
if (x.length !== 0) {
  $ERROR('#2: var x = new Array(); x.shift(); x.length === 0. Actual: ' + (x.length));
}

//CHECK#3
var x = Array(1, 2, 3);
x.length = 0;
var shift = x.shift();
if (shift !== undefined) {
  $ERROR('#2: var x = Array(1,2,3); x.length = 0; x.shift() === undefined. Actual: ' + (shift));
}

//CHECK#4
if (x.length !== 0) {
  $ERROR('#4: var x = new Array(1,2,3); x.length = 0; x.shift(); x.length === 0. Actual: ' + (x.length));
}