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

/**
 * The unshift function is intentionally generic.
 * It does not require that its this value be an Array object
 *
 * @path ch15/15.4/15.4.4/15.4.4.13/S15.4.4.13_A2_T2.js
 * @description The arguments are prepended to the start of the array, such that
 * their order within the array is the same as the order in which they appear in
 * the argument list
 */

var obj = {};
obj.unshift = Array.prototype.unshift;

//CHECK#1
obj.length = NaN;
var unshift = obj.unshift(-1);
if (unshift !== 1) {
  $ERROR('#1: var obj = {}; obj.length = NaN; obj.unshift = Array.prototype.unshift; obj.unshift(-1) === 1. Actual: ' + (unshift));
}

//CHECK#2
if (obj.length !== 1) {
  $ERROR('#2: var obj = {}; obj.length = NaN; obj.unshift = Array.prototype.unshift; obj.unshift(-1); obj.length === 1. Actual: ' + (obj.length));
}

//CHECK#3
if (obj["0"] !== -1) {
  $ERROR('#3: var obj = {}; obj.length = NaN; obj.unshift = Array.prototype.unshift; obj.unshift(-1); obj["0"] === -1. Actual: ' + (obj["0"]));
}

//CHECK#7
obj.length = Number.NEGATIVE_INFINITY;
var unshift = obj.unshift(-7);
if (unshift !== 1) {
  $ERROR('#7: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.unshift = Array.prototype.unshift; obj.unshift(-7) === 1. Actual: ' + (unshift));
}

//CHECK#8
if (obj.length !== 1) {
  $ERROR('#8: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.unshift = Array.prototype.unshift; obj.unshift(-7); obj.length === 1. Actual: ' + (obj.length));
}

//CHECK#9
if (obj["0"] !== -7) {
  $ERROR('#9: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.unshift = Array.prototype.unshift; obj.unshift(-7); obj["0"] === -7. Actual: ' + (obj["0"]));
}

//CHECK#10
obj.length = 0.5;
var unshift = obj.unshift(-10);
if (unshift !== 1) {
  $ERROR('#10: var obj = {}; obj.length = 0.5; obj.unshift = Array.prototype.unshift; obj.unshift(-10) === 1. Actual: ' + (unshift));
}

//CHECK#11
if (obj.length !== 1) {
  $ERROR('#11: var obj = {}; obj.length = 0.5; obj.unshift = Array.prototype.unshift; obj.unshift(-10); obj.length === 1. Actual: ' + (obj.length));
} 

//CHECK#12
if (obj["0"] !== -10) {
  $ERROR('#12: var obj = {}; obj.length = 0.5; obj.unshift = Array.prototype.unshift; obj.unshift(-10); obj["0"] === -10. Actual: ' + (obj["0"]));
}

//CHECK#13
obj.length = 1.5;
var unshift = obj.unshift(-13);
if (unshift !== 2) {
  $ERROR('#13: var obj = {}; obj.length = 1.5; obj.unshift = Array.prototype.unshift; obj.unshift(-13) === 2. Actual: ' + (unshift));
}

//CHECK#14
if (obj.length !== 2) {
  $ERROR('#14: var obj = {}; obj.length = 1.5; obj.unshift = Array.prototype.unshift; obj.unshift(-13); obj.length === 2. Actual: ' + (obj.length));
} 

//CHECK#15
if (obj["0"] !== -13) {
  $ERROR('#15: var obj = {}; obj.length = 1.5; obj.unshift = Array.prototype.unshift; obj.unshift(-13); obj["0"] === -13. Actual: ' + (obj["0"]));
}

//CHECK#16
obj.length = new Number(0);
var unshift = obj.unshift(-16);
if (unshift !== 1) {
  $ERROR('#16: var obj = {}; obj.length = new Number(0); obj.unshift = Array.prototype.unshift; obj.unshift(-16) === 1. Actual: ' + (unshift));
}

//CHECK#17
if (obj.length !== 1) {
  $ERROR('#17: var obj = {}; obj.length = new Number(0); obj.unshift = Array.prototype.unshift; obj.unshift(-16); obj.length === 1. Actual: ' + (obj.length));
}

//CHECK#18
if (obj["0"] !== -16) {
  $ERROR('#18: var obj = {}; obj.length = new Number(0); obj.unshift = Array.prototype.unshift; obj.unshift(-16); obj["0"] === -16. Actual: ' + (obj["0"]));
}