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/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
File Name: 15.4.5.2-2.js
ECMA Section: Array.length
Description:
15.4.5.2 length
The length property of this Array object is always numerically greater
than the name of every property whose name is an array index.
The length property has the attributes { DontEnum, DontDelete }.
This test verifies that the Array.length property is not Read Only.
Author: christine@netscape.com
Date: 12 november 1997
*/
var SECTION = "15.4.5.2-2";
var VERSION = "ECMA_1";
startTest();
var TITLE = "Array.length";
writeHeaderToLog( SECTION + " "+ TITLE);
addCase( new Array(), 0, Math.pow(2,14), Math.pow(2,14) );
addCase( new Array(), 0, 1, 1 );
addCase( new Array(Math.pow(2,12)), Math.pow(2,12), 0, 0 );
addCase( new Array(Math.pow(2,13)), Math.pow(2,13), Math.pow(2,12), Math.pow(2,12) );
addCase( new Array(Math.pow(2,12)), Math.pow(2,12), Math.pow(2,12), Math.pow(2,12) );
addCase( new Array(Math.pow(2,14)), Math.pow(2,14), Math.pow(2,12), Math.pow(2,12) )
// some tests where array is not empty
// array is populated with strings
for ( var arg = "", i = 0; i < Math.pow(2,12); i++ ) {
arg += String(i) + ( i != Math.pow(2,12)-1 ? "," : "" );
}
// print(i +":"+arg);
var a = eval( "new Array("+arg+")" );
addCase( a, i, i, i );
addCase( a, i, Math.pow(2,12)+i+1, Math.pow(2,12)+i+1, true );
addCase( a, Math.pow(2,12)+5, 0, 0, true );
test();
function addCase( object, old_len, set_len, new_len, checkitems ) {
object.length = set_len;
new TestCase( SECTION,
"array = new Array("+ old_len+"); array.length = " + set_len +
"; array.length",
new_len,
object.length );
if ( checkitems ) {
// verify that items between old and newlen are all undefined
if ( new_len < old_len ) {
var passed = true;
for ( var i = new_len; i < old_len; i++ ) {
if ( object[i] != void 0 ) {
passed = false;
}
}
new TestCase( SECTION,
"verify that array items have been deleted",
true,
passed );
}
if ( new_len > old_len ) {
var passed = true;
for ( var i = old_len; i < new_len; i++ ) {
if ( object[i] != void 0 ) {
passed = false;
}
}
new TestCase( SECTION,
"verify that new items are undefined",
true,
passed );
}
}
}
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