regress-58274.js (4885B)
1 /* -*- indent-tabs-mode: nil; js-indent-level: 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 functions 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 functions with double-byte names'; 39 var ERR = 'UNEXPECTED ERROR! \n'; 40 var ERR_MALFORMED_NAME = ERR + 'Could not find function name in: \n\n'; 41 var status = ''; 42 var statusitems = []; 43 var actual = ''; 44 var actualvalues = []; 45 var expect= ''; 46 var expectedvalues = []; 47 var sEval; 48 var sName; 49 50 51 sEval = "function f\u02B2() {return 42;}"; 52 eval(sEval); 53 sName = getFunctionName(f\u02B2); 54 55 // Test function call - 56 status = inSection(1); 57 actual = f\u02B2(); 58 expect = 42; 59 addThis(); 60 61 // Test both characters of function name - 62 status = inSection(2); 63 actual = sName[0]; 64 expect = sEval[9]; 65 addThis(); 66 67 status = inSection(3); 68 actual = sName[1]; 69 expect = sEval[10]; 70 addThis(); 71 72 73 74 sEval = "function f\u02B2\u0AAA () {return 84;}"; 75 eval(sEval); 76 sName = getFunctionName(f\u02B2\u0AAA); 77 78 // Test function call - 79 status = inSection(4); 80 actual = f\u02B2\u0AAA(); 81 expect = 84; 82 addThis(); 83 84 // Test all three characters of function name - 85 status = inSection(5); 86 actual = sName[0]; 87 expect = sEval[9]; 88 addThis(); 89 90 status = inSection(6); 91 actual = sName[1]; 92 expect = sEval[10]; 93 addThis(); 94 95 status = inSection(7); 96 actual = sName[2]; 97 expect = sEval[11]; 98 addThis(); 99 100 101 102 103 //----------------------------------------------------------------------------- 104 test(); 105 //----------------------------------------------------------------------------- 106 107 108 109 /* 110 * Goal: test that f.toString() contains the proper function name. 111 * 112 * Note, however, f.toString() is implementation-independent. For example, 113 * it may begin with '\nfunction' instead of 'function'. Therefore we use 114 * a regexp to make sure we extract the name properly. 115 * 116 * Here we assume that f has been defined by means of a function statement, 117 * and not a function expression (where it wouldn't have to have a name). 118 * 119 * Rhino uses a Unicode representation for f.toString(); whereas 120 * SpiderMonkey uses an ASCII representation, putting escape sequences 121 * for non-ASCII characters. For example, if a function is called f\u02B1, 122 * then in Rhino the toString() method will present a 2-character Unicode 123 * string for its name, whereas SpiderMonkey will present a 7-character 124 * ASCII string for its name: the string literal 'f\u02B1'. 125 * 126 * So we force the lexer to condense the string before using it. 127 * This will give uniform results in Rhino and SpiderMonkey. 128 */ 129 function getFunctionName(f) 130 { 131 var s = condenseStr(f.toString()); 132 var re = /\s*function\s+(\S+)\s*\(/; 133 var arr = s.match(re); 134 135 if (!(arr && arr[1])) 136 return ERR_MALFORMED_NAME + s; 137 return arr[1]; 138 } 139 140 141 /* 142 * This function is the opposite of functions like escape(), which take 143 * Unicode characters and return escape sequences for them. Here, we force 144 * the lexer to turn escape sequences back into single characters. 145 * 146 * Note we can't simply do |eval(str)|, since in practice |str| will be an 147 * identifier somewhere in the program (e.g. a function name); thus |eval(str)| 148 * would return the object that the identifier represents: not what we want. 149 * 150 * So we surround |str| lexicographically with quotes to force the lexer to 151 * evaluate it as a string. Have to strip out any linefeeds first, however - 152 */ 153 function condenseStr(str) 154 { 155 /* 156 * You won't be able to do the next step if |str| has 157 * any carriage returns or linefeeds in it. For example: 158 * 159 * js> eval("'" + '\nHello' + "'"); 160 * 1: SyntaxError: unterminated string literal: 161 * 1: ' 162 * 1: ^ 163 * 164 * So replace them with the empty string - 165 */ 166 str = str.replace(/[\r\n]/g, '') 167 return eval("'" + str + "'"); 168 } 169 170 171 function addThis() 172 { 173 statusitems[UBound] = status; 174 actualvalues[UBound] = actual; 175 expectedvalues[UBound] = expect; 176 UBound++; 177 } 178 179 180 function test() 181 { 182 printBugNumber(BUGNUMBER); 183 printStatus(summary); 184 185 for (var i=0; i<UBound; i++) 186 { 187 reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]); 188 } 189 }