15.4.2.2-1.js   [plain text]

/* The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code, released March
 * 31, 1998.
 *
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation. Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 * 
 */
/**
    File Name:          15.4.2.2-1.js
    ECMA Section:       15.4.2.2 new Array(len)

    Description:        This description only applies of the constructor is
                        given two or more arguments.

                        The [[Prototype]] property of the newly constructed
                        object is set to the original Array prototype object,
                        the one that is the initial value of Array.prototype(0)
                        (15.4.3.1).

                        The [[Class]] property of the newly constructed object
                        is set to "Array".

                        If the argument len is a number, then the length
                        property  of the newly constructed object is set to
                        ToUint32(len).

                        If the argument len is not a number, then the length
                        property of the newly constructed object is set to 1
                        and the 0 property of the newly constructed object is
                        set to len.

                        This file tests cases where len is a number.

                        The cases in this test need to be updated since the
                        ToUint32 description has changed.

    Author:             christine@netscape.com
    Date:               7 october 1997
*/
    var SECTION = "15.4.2.2-1";
    var VERSION = "ECMA_1";
    startTest();
    var TITLE   = "The Array Constructor:  new Array( len )";

    writeHeaderToLog( SECTION + " "+ TITLE);

    var testcases = getTestCases();
    test();

function getTestCases() {
    var array = new Array();
    var item = 0;

    array[item++] = new TestCase( SECTION,	"new Array(0)",             "",                 (new Array(0)).toString() );
    array[item++] = new TestCase( SECTION,	"typeof new Array(0)",      "object",           (typeof new Array(0)) );
    array[item++] = new TestCase( SECTION,	"(new Array(0)).length",    0,                  (new Array(0)).length );
    array[item++] = new TestCase( SECTION,	"(new Array(0)).toString", Array.prototype.toString,    (new Array(0)).toString );

    array[item++] = new TestCase( SECTION,   "new Array(1)",            "",                 (new Array(1)).toString() );
    array[item++] = new TestCase( SECTION,   "new Array(1).length",     1,                  (new Array(1)).length );
    array[item++] = new TestCase( SECTION,   "(new Array(1)).toString", Array.prototype.toString,   (new Array(1)).toString );

    array[item++] = new TestCase( SECTION,	"(new Array(-0)).length",                       0,  (new Array(-0)).length );
    array[item++] = new TestCase( SECTION,	"(new Array(0)).length",                        0,  (new Array(0)).length );

    array[item++] = new TestCase( SECTION,	"(new Array(10)).length",           10,         (new Array(10)).length );
    array[item++] = new TestCase( SECTION,	"(new Array('1')).length",          1,          (new Array('1')).length );
    array[item++] = new TestCase( SECTION,	"(new Array(1000)).length",         1000,       (new Array(1000)).length );
    array[item++] = new TestCase( SECTION,	"(new Array('1000')).length",       1,          (new Array('1000')).length );

    array[item++] = new TestCase( SECTION,	"(new Array(4294967295)).length",   ToUint32(4294967295),   (new Array(4294967295)).length );

    array[item++] = new TestCase( SECTION,	"(new Array('8589934592')).length", 1,                      (new Array("8589934592")).length );
    array[item++] = new TestCase( SECTION,	"(new Array('4294967296')).length", 1,                      (new Array("4294967296")).length );
    array[item++] = new TestCase( SECTION,	"(new Array(1073741824)).length",   ToUint32(1073741824),	(new Array(1073741824)).length );

    return ( array );
}
function test() {
    for ( tc=0; tc < testcases.length; tc++ ) {
        testcases[tc].passed = writeTestCaseResult(
                            testcases[tc].expect,
                            testcases[tc].actual,
                            testcases[tc].description +" = "+
                            testcases[tc].actual );

        testcases[tc].reason += ( testcases[tc].passed )
                             ? ""
                             : "wrong value ";
    }
    stopTest();
    return ( testcases );
}
function ToUint32( n ) {
    n = Number( n );
    var sign = ( n < 0 ) ? -1 : 1;

    if ( Math.abs( n ) == 0 || Math.abs( n ) == Number.POSITIVE_INFINITY) {
        return 0;
    }
    n = sign * Math.floor( Math.abs(n) )

    n = n % Math.pow(2,32);

    if ( n < 0 ){
        n += Math.pow(2,32);
    }

    return ( n );
}