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comparison: js/src/tests/ecma_3/Unicode/uc-005.js

js/src/tests/ecma_3/Unicode/uc-005.js

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TOR_BUG_3246
changeset 7
129ffea94266
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-1:000000000000 0:d2e61cca743e
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 /*
7 *
8 * Date: 15 July 2002
9 * SUMMARY: Testing identifiers with double-byte names
10 * See http://bugzilla.mozilla.org/show_bug.cgi?id=58274
11 *
12 * Here is a sample of the problem:
13 *
14 * js> function f\u02B1 () {}
15 *
16 * js> f\u02B1.toSource();
17 * function f¦() {}
18 *
19 * js> f\u02B1.toSource().toSource();
20 * (new String("function f\xB1() {}"))
21 *
22 *
23 * See how the high-byte information (the 02) has been lost?
24 * The same thing was happening with the toString() method:
25 *
26 * js> f\u02B1.toString();
27 *
28 * function f¦() {
29 * }
30 *
31 * js> f\u02B1.toString().toSource();
32 * (new String("\nfunction f\xB1() {\n}\n"))
33 *
34 */
35 //-----------------------------------------------------------------------------
36 var UBound = 0;
37 var BUGNUMBER = 58274;
38 var summary = 'Testing identifiers with double-byte names';
39 var status = '';
40 var statusitems = [];
41 var actual = '';
42 var actualvalues = [];
43 var expect= '';
44 var expectedvalues = [];
45
46
47 /*
48 * Define a function that uses double-byte identifiers in
49 * "every possible way"
50 *
51 * Then recover each double-byte identifier via f.toString().
52 * To make this easier, put a 'Z' token before every one.
53 *
54 * Our eval string will be:
55 *
56 * sEval = "function Z\u02b1(Z\u02b2, b) {
57 * try { Z\u02b3 : var Z\u02b4 = Z\u02b1; }
58 * catch (Z\u02b5) { for (var Z\u02b6 in Z\u02b5)
59 * {for (1; 1<0; Z\u02b7++) {new Array()[Z\u02b6] = 1;} };} }";
60 *
61 * It will be helpful to build this string in stages:
62 */
63 var s0 = 'function Z';
64 var s1 = '\u02b1(Z';
65 var s2 = '\u02b2, b) {try { Z';
66 var s3 = '\u02b3 : var Z';
67 var s4 = '\u02b4 = Z';
68 var s5 = '\u02b1; } catch (Z'
69 var s6 = '\u02b5) { for (var Z';
70 var s7 = '\u02b6 in Z';
71 var s8 = '\u02b5){for (1; 1<0; Z';
72 var s9 = '\u02b7++) {new Array()[Z';
73 var s10 = '\u02b6] = 1;} };} }';
74
75
76 /*
77 * Concatenate these and eval() to create the function Z\u02b1
78 */
79 var sEval = s0 + s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10;
80 eval(sEval);
81
82
83 /*
84 * Recover all the double-byte identifiers via Z\u02b1.toString().
85 * We'll recover the 1st one as arrID[1], the 2nd one as arrID[2],
86 * and so on ...
87 */
88 var arrID = getIdentifiers(Z\u02b1);
89
90
91 /*
92 * Now check that we got back what we put in -
93 */
94 status = inSection(1);
95 actual = arrID[1];
96 expect = s1.charAt(0);
97 addThis();
98
99 status = inSection(2);
100 actual = arrID[2];
101 expect = s2.charAt(0);
102 addThis();
103
104 status = inSection(3);
105 actual = arrID[3];
106 expect = s3.charAt(0);
107 addThis();
108
109 status = inSection(4);
110 actual = arrID[4];
111 expect = s4.charAt(0);
112 addThis();
113
114 status = inSection(5);
115 actual = arrID[5];
116 expect = s5.charAt(0);
117 addThis();
118
119 status = inSection(6);
120 actual = arrID[6];
121 expect = s6.charAt(0);
122 addThis();
123
124 status = inSection(7);
125 actual = arrID[7];
126 expect = s7.charAt(0);
127 addThis();
128
129 status = inSection(8);
130 actual = arrID[8];
131 expect = s8.charAt(0);
132 addThis();
133
134 status = inSection(9);
135 actual = arrID[9];
136 expect = s9.charAt(0);
137 addThis();
138
139 status = inSection(10);
140 actual = arrID[10];
141 expect = s10.charAt(0);
142 addThis();
143
144
145
146
147 //-----------------------------------------------------------------------------
148 test();
149 //-----------------------------------------------------------------------------
150
151
152
153 /*
154 * Goal: recover the double-byte identifiers from f.toString()
155 * by getting the very next character after each 'Z' token.
156 *
157 * The return value will be an array |arr| indexed such that
158 * |arr[1]| is the 1st identifier, |arr[2]| the 2nd, and so on.
159 *
160 * Note, however, f.toString() is implementation-independent.
161 * For example, it may begin with '\nfunction' instead of 'function'.
162 *
163 * Rhino uses a Unicode representation for f.toString(); whereas
164 * SpiderMonkey uses an ASCII representation, putting escape sequences
165 * for non-ASCII characters. For example, if a function is called f\u02B1,
166 * then in Rhino the toString() method will present a 2-character Unicode
167 * string for its name, whereas SpiderMonkey will present a 7-character
168 * ASCII string for its name: the string literal 'f\u02B1'.
169 *
170 * So we force the lexer to condense the string before we use it.
171 * This will give uniform results in Rhino and SpiderMonkey.
172 */
173 function getIdentifiers(f)
174 {
175 var str = condenseStr(f.toString());
176 var arr = str.split('Z');
177
178 /*
179 * The identifiers are the 1st char of each split substring
180 * EXCEPT the first one, which is just ('\n' +) 'function '.
181 *
182 * Thus note the 1st identifier will be stored in |arr[1]|,
183 * the 2nd one in |arr[2]|, etc., making the indexing easy -
184 */
185 for (i in arr)
186 arr[i] = arr[i].charAt(0);
187 return arr;
188 }
189
190
191 /*
192 * This function is the opposite of a functions like escape(), which take
193 * Unicode characters and return escape sequences for them. Here, we force
194 * the lexer to turn escape sequences back into single characters.
195 *
196 * Note we can't simply do |eval(str)|, since in practice |str| will be an
197 * identifier somewhere in the program (e.g. a function name); thus |eval(str)|
198 * would return the object that the identifier represents: not what we want.
199 *
200 * So we surround |str| lexicographically with quotes to force the lexer to
201 * evaluate it as a string. Have to strip out any linefeeds first, however -
202 */
203 function condenseStr(str)
204 {
205 /*
206 * You won't be able to do the next step if |str| has
207 * any carriage returns or linefeeds in it. For example:
208 *
209 * js> eval("'" + '\nHello' + "'");
210 * 1: SyntaxError: unterminated string literal:
211 * 1: '
212 * 1: ^
213 *
214 * So replace them with the empty string -
215 */
216 str = str.replace(/[\r\n]/g, '')
217 return eval("'" + str + "'")
218 }
219
220
221 function addThis()
222 {
223 statusitems[UBound] = status;
224 actualvalues[UBound] = actual;
225 expectedvalues[UBound] = expect;
226 UBound++;
227 }
228
229
230 function test()
231 {
232 enterFunc('test');
233 printBugNumber(BUGNUMBER);
234 printStatus(summary);
235
236 for (var i=0; i<UBound; i++)
237 {
238 reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
239 }
240
241 exitFunc ('test');
242 }

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