JSTests/test262/test/built-ins/Array/prototype/join/S15.4.4.5_A2_T1.js

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

/*---
info: |
    The join function is intentionally generic.
    It does not require that its this value be an Array object
esid: sec-array.prototype.join
description: If ToUint32(length) is zero, return the empty string
---*/

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

if (obj.length !== undefined) {
  $ERROR('#0: var obj = {}; obj.length === undefined. Actual: ' + (obj.length));
} else {
  //CHECK#1
  if (obj.join() !== "") {
    $ERROR('#1: var obj = {}; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
  }
  //CHECK#2
  if (obj.length !== undefined) {
    $ERROR('#2: var obj = {}; obj.join = Array.prototype.join; obj.join(); obj.length === undefined. Actual: ' + (obj.length));
  }
}

//CHECK#3
obj.length = undefined;
if (obj.join() !== "") {
  $ERROR('#3: var obj = {}; obj.length = undefined; obj.join = Array.prototype.join; obj.join() === ". Actual: ' + (obj.join()));
}

//CHECK#4
if (obj.length !== undefined) {
  $ERROR('#4: var obj = {}; obj.length = undefined; obj.join = Array.prototype.join; obj.join(); obj.length === undefined. Actual: ' + (obj.length));
}

//CHECK#5
obj.length = null
if (obj.join() !== "") {
  $ERROR('#5: var obj = {}; obj.length = null; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
}

//CHECK#6
if (obj.length !== null) {
  $ERROR('#6: var obj = {}; obj.length = null; obj.join = Array.prototype.join; obj.join(); obj.length === null. Actual: ' + (obj.length));
}