1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/tests/ecma/extensions/15.5.4.7-3.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,127 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +
1.10 +/**
1.11 + File Name: 15.5.4.7-3.js
1.12 + ECMA Section: 15.5.4.7 String.prototype.lastIndexOf( searchString, pos)
1.13 + Description:
1.14 +
1.15 + If the given searchString appears as a substring of the result of
1.16 + converting this object to a string, at one or more positions that are
1.17 + at or to the left of the specified position, then the index of the
1.18 + rightmost such position is returned; otherwise -1 is returned. If position
1.19 + is undefined or not supplied, the length of this string value is assumed,
1.20 + so as to search all of the string.
1.21 +
1.22 + When the lastIndexOf method is called with two arguments searchString and
1.23 + position, the following steps are taken:
1.24 +
1.25 + 1.Call ToString, giving it the this value as its argument.
1.26 + 2.Call ToString(searchString).
1.27 + 3.Call ToNumber(position). (If position is undefined or not supplied, this step produces the value NaN).
1.28 + 4.If Result(3) is NaN, use +; otherwise, call ToInteger(Result(3)).
1.29 + 5.Compute the number of characters in Result(1).
1.30 + 6.Compute min(max(Result(4), 0), Result(5)).
1.31 + 7.Compute the number of characters in the string that is Result(2).
1.32 + 8.Compute the largest possible integer k not larger than Result(6) such that k+Result(7) is not greater
1.33 + than Result(5), and for all nonnegative integers j less than Result(7), the character at position k+j of
1.34 + Result(1) is the same as the character at position j of Result(2); but if there is no such integer k, then
1.35 + compute the value -1.
1.36 +
1.37 + 1.Return Result(8).
1.38 +
1.39 + Note that the lastIndexOf function is intentionally generic; it does not require that its this value be a
1.40 + String object. Therefore it can be transferred to other kinds of objects for use as a method.
1.41 +
1.42 + Author: christine@netscape.com
1.43 + Date: 2 october 1997
1.44 +*/
1.45 +var SECTION = "15.5.4.7-3";
1.46 +var VERSION = "ECMA_2";
1.47 +startTest();
1.48 +var TITLE = "String.protoype.lastIndexOf";
1.49 +
1.50 +writeHeaderToLog( SECTION + " "+ TITLE);
1.51 +
1.52 +new TestCase( SECTION,
1.53 + "var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 0 )",
1.54 + -1,
1.55 + eval("var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 0 )") );
1.56 +
1.57 +new TestCase( SECTION,
1.58 + "var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 1 )",
1.59 + 1,
1.60 + eval("var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 1 )") );
1.61 +
1.62 +new TestCase( SECTION,
1.63 + "var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 2 )",
1.64 + 1,
1.65 + eval("var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 2 )") );
1.66 +
1.67 +new TestCase( SECTION,
1.68 + "var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 10 )",
1.69 + 1,
1.70 + eval("var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r', 10 )") );
1.71 +
1.72 +new TestCase( SECTION,
1.73 + "var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r' )",
1.74 + 1,
1.75 + eval("var b = true; b.__proto__.lastIndexOf = String.prototype.lastIndexOf; b.lastIndexOf('r' )") );
1.76 +
1.77 +test();
1.78 +
1.79 +function LastIndexOf( string, search, position ) {
1.80 + string = String( string );
1.81 + search = String( search );
1.82 +
1.83 + position = Number( position )
1.84 +
1.85 + if ( isNaN( position ) ) {
1.86 + position = Infinity;
1.87 + } else {
1.88 + position = ToInteger( position );
1.89 + }
1.90 +
1.91 + result5= string.length;
1.92 + result6 = Math.min(Math.max(position, 0), result5);
1.93 + result7 = search.length;
1.94 +
1.95 + if (result7 == 0) {
1.96 + return Math.min(position, result5);
1.97 + }
1.98 +
1.99 + result8 = -1;
1.100 +
1.101 + for ( k = 0; k <= result6; k++ ) {
1.102 + if ( k+ result7 > result5 ) {
1.103 + break;
1.104 + }
1.105 + for ( j = 0; j < result7; j++ ) {
1.106 + if ( string.charAt(k+j) != search.charAt(j) ){
1.107 + break;
1.108 + } else {
1.109 + if ( j == result7 -1 ) {
1.110 + result8 = k;
1.111 + }
1.112 + }
1.113 + }
1.114 + }
1.115 +
1.116 + return result8;
1.117 +}
1.118 +function ToInteger( n ) {
1.119 + n = Number( n );
1.120 + if ( isNaN(n) ) {
1.121 + return 0;
1.122 + }
1.123 + if ( Math.abs(n) == 0 || Math.abs(n) == Infinity ) {
1.124 + return n;
1.125 + }
1.126 +
1.127 + var sign = ( n < 0 ) ? -1 : 1;
1.128 +
1.129 + return ( sign * Math.floor(Math.abs(n)) );
1.130 +}
