JSTests/mozilla/ecma/TypeConversion/9.6.js

/* 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:          9.6.js
    ECMA Section:       9.6  Type Conversion:  ToUint32
    Description:        rules for converting an argument to an unsigned
                        32 bit integer

                        this test uses >>> 0 to convert the argument to
                        an unsigned 32bit integer.

                        1 call ToNumber on argument
                        2 if result is NaN, 0, -0, Infinity, -Infinity
                            return 0
                        3 compute (sign (result(1)) * floor(abs(result 1)))
                        4 compute result(3) modulo 2^32:
                        5 return result(4)

                        special cases:
                            -0          returns 0
                            Infinity    returns 0
                            -Infinity   returns 0
                            0           returns 0
                            ToInt32(ToUint32(x)) == ToInt32(x) for all values of x
                            ** NEED TO DO THIS PART IN A SEPARATE TEST FILE **


    Author:             christine@netscape.com
    Date:               17 july 1997
*/

    var SECTION = "9.6";
    var VERSION = "ECMA_1";
    startTest();
    var testcases = getTestCases();

    writeHeaderToLog( SECTION + " Type Conversion:  ToUint32");
    test();

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

    array[item++] = new TestCase( SECTION,    "0 >>> 0",                          0,          0 >>> 0 );
//    array[item++] = new TestCase( SECTION,    "+0 >>> 0",                         0,          +0 >>> 0);
    array[item++] = new TestCase( SECTION,    "-0 >>> 0",                         0,          -0 >>> 0 );
    array[item++] = new TestCase( SECTION,    "'Infinity' >>> 0",                 0,          "Infinity" >>> 0 );
    array[item++] = new TestCase( SECTION,    "'-Infinity' >>> 0",                0,          "-Infinity" >>> 0);
    array[item++] = new TestCase( SECTION,    "'+Infinity' >>> 0",                0,          "+Infinity" >>> 0 );
    array[item++] = new TestCase( SECTION,    "Number.POSITIVE_INFINITY >>> 0",   0,          Number.POSITIVE_INFINITY >>> 0 );
    array[item++] = new TestCase( SECTION,    "Number.NEGATIVE_INFINITY >>> 0",   0,          Number.NEGATIVE_INFINITY >>> 0 );
    array[item++] = new TestCase( SECTION,    "Number.NaN >>> 0",                 0,          Number.NaN >>> 0 );

    array[item++] = new TestCase( SECTION,    "Number.MIN_VALUE >>> 0",           0,          Number.MIN_VALUE >>> 0 );
    array[item++] = new TestCase( SECTION,    "-Number.MIN_VALUE >>> 0",          0,          Number.MIN_VALUE >>> 0 );
    array[item++] = new TestCase( SECTION,    "0.1 >>> 0",                        0,          0.1 >>> 0 );
    array[item++] = new TestCase( SECTION,    "-0.1 >>> 0",                       0,          -0.1 >>> 0 );
    array[item++] = new TestCase( SECTION,    "1 >>> 0",                          1,          1 >>> 0 );
    array[item++] = new TestCase( SECTION,    "1.1 >>> 0",                        1,          1.1 >>> 0 );

    array[item++] = new TestCase( SECTION,    "-1.1 >>> 0",                       ToUint32(-1.1),       -1.1 >>> 0 );
    array[item++] = new TestCase( SECTION,    "-1 >>> 0",                         ToUint32(-1),         -1 >>> 0 );

    array[item++] = new TestCase( SECTION,    "2147483647 >>> 0",         ToUint32(2147483647),     2147483647 >>> 0 );
    array[item++] = new TestCase( SECTION,    "2147483648 >>> 0",         ToUint32(2147483648),     2147483648 >>> 0 );
    array[item++] = new TestCase( SECTION,    "2147483649 >>> 0",         ToUint32(2147483649),     2147483649 >>> 0 );

    array[item++] = new TestCase( SECTION,    "4294967295 >>> 0",         ToUint32(4294967295),     4294967295 >>> 0 );
    array[item++] = new TestCase( SECTION,    "4294967296 >>> 0",         ToUint32(4294967296),     4294967296 >>> 0 );
    array[item++] = new TestCase( SECTION,    "4294967297 >>> 0",         ToUint32(4294967297),     4294967297 >>> 0 );

    array[item++] = new TestCase( SECTION,    "-2147483647 >>> 0",        ToUint32(-2147483647),    -2147483647 >>> 0 );
    array[item++] = new TestCase( SECTION,    "-2147483648 >>> 0",        ToUint32(-2147483648),    -2147483648 >>> 0 );
    array[item++] = new TestCase( SECTION,    "-2147483649 >>> 0",        ToUint32(-2147483649),    -2147483649 >>> 0 );

    array[item++] = new TestCase( SECTION,    "-4294967295 >>> 0",        ToUint32(-4294967295),    -4294967295 >>> 0 );
    array[item++] = new TestCase( SECTION,    "-4294967296 >>> 0",        ToUint32(-4294967296),    -4294967296 >>> 0 );
    array[item++] = new TestCase( SECTION,    "-4294967297 >>> 0",        ToUint32(-4294967297),    -4294967297 >>> 0 );

    array[item++] = new TestCase( SECTION,    "'2147483647' >>> 0",       ToUint32(2147483647),     '2147483647' >>> 0 );
    array[item++] = new TestCase( SECTION,    "'2147483648' >>> 0",       ToUint32(2147483648),     '2147483648' >>> 0 );
    array[item++] = new TestCase( SECTION,    "'2147483649' >>> 0",       ToUint32(2147483649),     '2147483649' >>> 0 );

    array[item++] = new TestCase( SECTION,    "'4294967295' >>> 0",       ToUint32(4294967295),     '4294967295' >>> 0 );
    array[item++] = new TestCase( SECTION,    "'4294967296' >>> 0",       ToUint32(4294967296),     '4294967296' >>> 0 );
    array[item++] = new TestCase( SECTION,    "'4294967297' >>> 0",       ToUint32(4294967297),     '4294967297' >>> 0 );

    return ( array );
}