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