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:          15.4.4.3-1.js
michael@0:    ECMA Section:       15.4.4.3-1 Array.prototype.reverse()
michael@0:    Description:
michael@0: 
michael@0:    The elements of the array are rearranged so as to reverse their order.
michael@0:    This object is returned as the result of the call.
michael@0: 
michael@0:    1.   Call the [[Get]] method of this object with argument "length".
michael@0:    2.   Call ToUint32(Result(1)).
michael@0:    3.   Compute floor(Result(2)/2).
michael@0:    4.   Let k be 0.
michael@0:    5.   If k equals Result(3), return this object.
michael@0:    6.   Compute Result(2)k1.
michael@0:    7.   Call ToString(k).
michael@0:    8.   ToString(Result(6)).
michael@0:    9.   Call the [[Get]] method of this object with argument Result(7).
michael@0:    10.   Call the [[Get]] method of this object with argument Result(8).
michael@0:    11.   If this object has a property named by Result(8), go to step 12; but
michael@0:    if this object has no property named by Result(8), then go to either
michael@0:    step 12 or step 14, depending on the implementation.
michael@0:    12.   Call the [[Put]] method of this object with arguments Result(7) and
michael@0:    Result(10).
michael@0:    13.   Go to step 15.
michael@0:    14.   Call the [[Delete]] method on this object, providing Result(7) as the
michael@0:    name of the property to delete.
michael@0:    15.   If this object has a property named by Result(7), go to step 16; but if
michael@0:    this object has no property named by Result(7), then go to either step 16
michael@0:    or step 18, depending on the implementation.
michael@0:    16.   Call the [[Put]] method of this object with arguments Result(8) and
michael@0:    Result(9).
michael@0:    17.   Go to step 19.
michael@0:    18.   Call the [[Delete]] method on this object, providing Result(8) as the
michael@0:    name of the property to delete.
michael@0:    19.   Increase k by 1.
michael@0:    20.   Go to step 5.
michael@0: 
michael@0:    Note that the reverse function is intentionally generic; it does not require
michael@0:    that its this value be an Array object. Therefore it can be transferred to other
michael@0:    kinds of objects for use as a method. Whether the reverse function can be applied
michael@0:    successfully to a host object is implementation dependent.
michael@0: 
michael@0:    Note:   Array.prototype.reverse allows some flexibility in implementation
michael@0:    regarding array indices that have not been populated. This test covers the
michael@0:    cases in which unpopulated indices are not deleted, since the JavaScript
michael@0:    implementation does not delete uninitialzed indices.
michael@0: 
michael@0:    Author:             christine@netscape.com
michael@0:    Date:               7 october 1997
michael@0: */
michael@0: 
michael@0: var SECTION = "15.4.4.4-1";
michael@0: var VERSION = "ECMA_1";
michael@0: startTest();
michael@0: 
michael@0: writeHeaderToLog( SECTION + " Array.prototype.reverse()");
michael@0: 
michael@0: var ARR_PROTOTYPE = Array.prototype;
michael@0: 
michael@0: new TestCase( SECTION, "Array.prototype.reverse.length",           0,      Array.prototype.reverse.length );
michael@0: new TestCase( SECTION, "delete Array.prototype.reverse.length",    false,  delete Array.prototype.reverse.length );
michael@0: new TestCase( SECTION, "delete Array.prototype.reverse.length; Array.prototype.reverse.length",    0, eval("delete Array.prototype.reverse.length; Array.prototype.reverse.length") );
michael@0: 
michael@0: // length of array is 0
michael@0: new TestCase(   SECTION,
michael@0: 		"var A = new Array();   A.reverse(); A.length",
michael@0: 		0,
michael@0: 		eval("var A = new Array();   A.reverse(); A.length") );
michael@0: 
michael@0: test();
michael@0: 
michael@0: function CheckItems( R, A ) {
michael@0:   for ( var i = 0; i < R.length; i++ ) {
michael@0:     new TestCase(
michael@0:       SECTION,
michael@0:       "A["+i+ "]",
michael@0:       R[i],
michael@0:       A[i] );
michael@0:   }
michael@0: }
michael@0: test();
michael@0: 
michael@0: function Object_1( value ) {
michael@0:   this.array = value.split(",");
michael@0:   this.length = this.array.length;
michael@0:   for ( var i = 0; i < this.length; i++ ) {
michael@0:     this[i] = eval(this.array[i]);
michael@0:   }
michael@0:   this.join = Array.prototype.reverse;
michael@0:   this.getClass = Object.prototype.toString;
michael@0: }
michael@0: function Reverse( array ) {
michael@0:   var r2 = array.length;
michael@0:   var k = 0;
michael@0:   var r3 = Math.floor( r2/2 );
michael@0:   if ( r3 == k ) {
michael@0:     return array;
michael@0:   }
michael@0: 
michael@0:   for ( k = 0;  k < r3; k++ ) {
michael@0:     var r6 = r2 - k - 1;
michael@0: //        var r7 = String( k );
michael@0:     var r7 = k;
michael@0:     var r8 = String( r6 );
michael@0: 
michael@0:     var r9 = array[r7];
michael@0:     var r10 = array[r8];
michael@0: 
michael@0:     array[r7] = r10;
michael@0:     array[r8] = r9;
michael@0:   }
michael@0: 
michael@0:   return array;
michael@0: }
michael@0: function Iterate( array ) {
michael@0:   for ( var i = 0; i < array.length; i++ ) {
michael@0: //        print( i+": "+ array[String(i)] );
michael@0:   }
michael@0: }
michael@0: 
michael@0: function Object_1( value ) {
michael@0:   this.array = value.split(",");
michael@0:   this.length = this.array.length;
michael@0:   for ( var i = 0; i < this.length; i++ ) {
michael@0:     this[i] = this.array[i];
michael@0:   }
michael@0:   this.reverse = Array.prototype.reverse;
michael@0:   this.getClass = Object.prototype.toString;
michael@0: }