1/* The contents of this file are subject to the Netscape Public
2 * License Version 1.1 (the "License"); you may not use this file
3 * except in compliance with the License. You may obtain a copy of
4 * the License at http://www.mozilla.org/NPL/
5 *
6 * Software distributed under the License is distributed on an "AS
7 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
8 * implied. See the License for the specific language governing
9 * rights and limitations under the License.
10 *
11 * The Original Code is Mozilla Communicator client code, released March
12 * 31, 1998.
13 *
14 * The Initial Developer of the Original Code is Netscape Communications
15 * Corporation. Portions created by Netscape are
16 * Copyright (C) 1998 Netscape Communications Corporation. All
17 * Rights Reserved.
18 *
19 * Contributor(s):
20 *
21 */
22/**
23    File Name:          15.1.2.5-2.js
24    ECMA Section:       15.1.2.5  Function properties of the global object
25                        unescape( string )
26    Description:
27
28    This tests the cases where there are fewer than 4 characters following "%u",
29    or fewer than 2 characters following "%" or "%u".
30
31    The unescape function computes a new version of a string value in which
32    each escape sequences of the sort that might be introduced by the escape
33    function is replaced with the character that it represents.
34
35    When the unescape function is called with one argument string, the
36    following steps are taken:
37
38    1.  Call ToString(string).
39    2.  Compute the number of characters in Result(1).
40    3.  Let R be the empty string.
41    4.  Let k be 0.
42    5.  If k equals Result(2), return R.
43    6.  Let c be the character at position k within Result(1).
44    7.  If c is not %, go to step 18.
45    8.  If k is greater than Result(2)-6, go to step 14.
46    9.  If the character at position k+1 within result(1) is not u, go to step
47        14.
48    10. If the four characters at positions k+2, k+3, k+4, and k+5 within
49        Result(1) are not all hexadecimal digits, go to step 14.
50    11. Let c be the character whose Unicode encoding is the integer represented
51        by the four hexadecimal digits at positions k+2, k+3, k+4, and k+5
52        within Result(1).
53    12. Increase k by 5.
54    13. Go to step 18.
55    14. If k is greater than Result(2)-3, go to step 18.
56    15. If the two characters at positions k+1 and k+2 within Result(1) are not
57        both hexadecimal digits, go to step 18.
58    16. Let c be the character whose Unicode encoding is the integer represented
59        by two zeroes plus the two hexadecimal digits at positions k+1 and k+2
60        within Result(1).
61    17. Increase k by 2.
62    18. Let R be a new string value computed by concatenating the previous value
63        of R and c.
64    19. Increase k by 1.
65    20. Go to step 5.
66    Author:             christine@netscape.com
67    Date:               28 october 1997
68*/
69
70    var SECTION = "15.1.2.5-2";
71    var VERSION = "ECMA_1";
72    startTest();
73    var TITLE   = "unescape(string)";
74
75    writeHeaderToLog( SECTION + " "+ TITLE);
76
77    var testcases = getTestCases();
78
79    test();
80
81function getTestCases() {
82    var array = new Array();
83    var item = 0;
84
85    // since there is only one character following "%", no conversion should occur.
86
87    for ( var CHARCODE = 0; CHARCODE < 256; CHARCODE += 16 ) {
88        array[item++] = new TestCase( SECTION,
89                            "unescape( %"+ (ToHexString(CHARCODE)).substring(0,1) +" )",
90                            "%"+(ToHexString(CHARCODE)).substring(0,1),
91                            unescape( "%" + (ToHexString(CHARCODE)).substring(0,1) )  );
92    }
93
94    // since there is only one character following "%u", no conversion should occur.
95
96    for ( var CHARCODE = 0; CHARCODE < 256; CHARCODE +=16 ) {
97        array[item++] = new TestCase( SECTION,
98                            "unescape( %u"+ (ToHexString(CHARCODE)).substring(0,1) +" )",
99                            "%u"+(ToHexString(CHARCODE)).substring(0,1),
100                            unescape( "%u" + (ToHexString(CHARCODE)).substring(0,1) )  );
101    }
102
103
104    // three char unicode string.  no conversion should occur
105
106    for ( var CHARCODE = 1024; CHARCODE < 65536; CHARCODE+= 1234 ) {
107        array[item++] = new TestCase
108                        (   SECTION,
109                            "unescape( %u"+ (ToUnicodeString(CHARCODE)).substring(0,3)+ " )",
110
111                            "%u"+(ToUnicodeString(CHARCODE)).substring(0,3),
112                            unescape( "%u"+(ToUnicodeString(CHARCODE)).substring(0,3) )
113                        );
114    }
115
116    return ( array );
117}
118
119function ToUnicodeString( n ) {
120    var string = ToHexString(n);
121
122    for ( var PAD = (4 - string.length ); PAD > 0; PAD-- ) {
123        string = "0" + string;
124    }
125
126    return string;
127}
128function ToHexString( n ) {
129    var hex = new Array();
130
131    for ( var mag = 1; Math.pow(16,mag) <= n ; mag++ ) {
132        ;
133    }
134
135    for ( index = 0, mag -= 1; mag > 0; index++, mag-- ) {
136        hex[index] = Math.floor( n / Math.pow(16,mag) );
137        n -= Math.pow(16,mag) * Math.floor( n/Math.pow(16,mag) );
138    }
139
140    hex[hex.length] = n % 16;
141
142    var string ="";
143
144    for ( var index = 0 ; index < hex.length ; index++ ) {
145        switch ( hex[index] ) {
146            case 10:
147                string += "A";
148                break;
149            case 11:
150                string += "B";
151                break;
152            case 12:
153                string += "C";
154                break;
155            case 13:
156                string += "D";
157                break;
158            case 14:
159                string += "E";
160                break;
161            case 15:
162                string += "F";
163                break;
164            default:
165                string += hex[index];
166        }
167    }
168
169    if ( string.length == 1 ) {
170        string = "0" + string;
171    }
172    return string;
173}
174function test() {
175    for ( tc=0; tc < testcases.length; tc++ ) {
176        testcases[tc].passed = writeTestCaseResult(
177                            testcases[tc].expect,
178                            testcases[tc].actual,
179                            testcases[tc].description +" = "+ testcases[tc].actual );
180        testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
181    }
182    stopTest();
183    return ( testcases );
184}
185