зеркало из https://github.com/mozilla/gecko-dev.git
121 строка
3.9 KiB
JavaScript
121 строка
3.9 KiB
JavaScript
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/* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code, released March
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* 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*
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*/
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/**
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File Name: 15.4.5.2-2.js
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ECMA Section: Array.length
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Description:
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15.4.5.2 length
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The length property of this Array object is always numerically greater
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than the name of every property whose name is an array index.
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The length property has the attributes { DontEnum, DontDelete }.
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This test verifies that the Array.length property is not Read Only.
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Author: christine@netscape.com
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Date: 12 november 1997
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*/
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var SECTION = "15.4.5.2-2";
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var VERSION = "ECMA_1";
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startTest();
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var TITLE = "Array.length";
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writeHeaderToLog( SECTION + " "+ TITLE);
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var testcases = new Array();
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addCase( new Array(), 0, Math.pow(2,14), Math.pow(2,14) );
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addCase( new Array(), 0, 1, 1 );
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addCase( new Array(Math.pow(2,12)), Math.pow(2,12), 0, 0 );
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addCase( new Array(Math.pow(2,13)), Math.pow(2,13), Math.pow(2,12), Math.pow(2,12) );
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addCase( new Array(Math.pow(2,12)), Math.pow(2,12), Math.pow(2,12), Math.pow(2,12) );
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addCase( new Array(Math.pow(2,14)), Math.pow(2,14), Math.pow(2,12), Math.pow(2,12) )
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// some tests where array is not empty
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// array is populated with strings
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for ( var arg = "", i = 0; i < Math.pow(2,12); i++ ) {
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arg += String(i) + ( i != Math.pow(2,12)-1 ? "," : "" );
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}
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// print(i +":"+arg);
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var a = eval( "new Array("+arg+")" );
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addCase( a, i, i, i );
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addCase( a, i, Math.pow(2,12)+i+1, Math.pow(2,12)+i+1, true );
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addCase( a, Math.pow(2,12)+5, 0, 0, true );
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test();
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function addCase( object, old_len, set_len, new_len, checkitems ) {
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object.length = set_len;
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testcases[testcases.length] = new TestCase( SECTION,
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"array = new Array("+ old_len+"); array.length = " + set_len +
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"; array.length",
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new_len,
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object.length );
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if ( checkitems ) {
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// verify that items between old and newlen are all undefined
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if ( new_len < old_len ) {
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var passed = true;
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for ( var i = new_len; i < old_len; i++ ) {
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if ( object[i] != void 0 ) {
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passed = false;
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}
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}
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testcases[testcases.length] = new TestCase( SECTION,
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"verify that array items have been deleted",
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true,
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passed );
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}
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if ( new_len > old_len ) {
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var passed = true;
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for ( var i = old_len; i < new_len; i++ ) {
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if ( object[i] != void 0 ) {
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passed = false;
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}
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}
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testcases[testcases.length] = new TestCase( SECTION,
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"verify that new items are undefined",
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true,
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passed );
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}
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}
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}
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function test() {
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for ( tc=0; tc < testcases.length; tc++ ) {
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testcases[tc].passed = writeTestCaseResult(
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testcases[tc].expect,
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testcases[tc].actual,
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testcases[tc].description +" = "+
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testcases[tc].actual );
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testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
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}
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stopTest();
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return ( testcases );
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}
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