The Tor Browser: js/src/tests/ecma/Array/15.4.5.2-2.js@8bccb770b82d

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 /**

     8    File Name:          15.4.5.2-2.js

     9    ECMA Section:       Array.length

    10    Description:

    11    15.4.5.2 length

    12    The length property of this Array object is always numerically greater

    13    than the name of every property whose name is an array index.

    15    The length property has the attributes { DontEnum, DontDelete }.

    17    This test verifies that the Array.length property is not Read Only.

    19    Author:             christine@netscape.com

    20    Date:               12 november 1997

    21 */

    23 var SECTION = "15.4.5.2-2";

    24 var VERSION = "ECMA_1";

    25 startTest();

    26 var TITLE   = "Array.length";

    28 writeHeaderToLog( SECTION + " "+ TITLE);

    30 addCase( new Array(), 0, Math.pow(2,14), Math.pow(2,14) );

    32 addCase( new Array(), 0, 1, 1 );

    34 addCase( new Array(Math.pow(2,12)), Math.pow(2,12), 0, 0 );

    35 addCase( new Array(Math.pow(2,13)), Math.pow(2,13), Math.pow(2,12), Math.pow(2,12) );

    36 addCase( new Array(Math.pow(2,12)), Math.pow(2,12), Math.pow(2,12), Math.pow(2,12) );

    37 addCase( new Array(Math.pow(2,14)), Math.pow(2,14), Math.pow(2,12), Math.pow(2,12) )

    39 // some tests where array is not empty

    40 // array is populated with strings

    41   for ( var arg = "", i = 0; i < Math.pow(2,12); i++ ) {

    42     arg +=  String(i) + ( i != Math.pow(2,12)-1 ? "," : "" );

    44   }

    45 //      print(i +":"+arg);

    47 var a = eval( "new Array("+arg+")" );

    49 addCase( a, i, i, i );

    50 addCase( a, i, Math.pow(2,12)+i+1, Math.pow(2,12)+i+1, true );

    51 addCase( a, Math.pow(2,12)+5, 0, 0, true );

    53 test();

    55 function addCase( object, old_len, set_len, new_len, checkitems ) {

    56   object.length = set_len;

    58   new TestCase( SECTION,

    59 		"array = new Array("+ old_len+"); array.length = " + set_len +

    60 		"; array.length",

    61 		new_len,

    62 		object.length );

    64   if ( checkitems ) {

    65     // verify that items between old and newlen are all undefined

    66     if ( new_len < old_len ) {

    67       var passed = true;

    68       for ( var i = new_len; i < old_len; i++ ) {

    69 	if ( object[i] != void 0 ) {

    70 	  passed = false;

    71 	}

    72       }

    73       new TestCase( SECTION,

    74 		    "verify that array items have been deleted",

    75 		    true,

    76 		    passed );

    77     }

    78     if ( new_len > old_len ) {

    79       var passed = true;

    80       for ( var i = old_len; i < new_len; i++ ) {

    81 	if ( object[i] != void 0 ) {

    82 	  passed = false;

    83 	}

    84       }

    85       new TestCase( SECTION,

    86 		    "verify that new items are undefined",

    87 		    true,

    88 		    passed );

    89     }

    90   }

    92 }

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