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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/*
*
* Date: 15 July 2002
* SUMMARY: Testing functions with double-byte names
*
* Here is a sample of the problem:
*
* js> function f\u02B1 () {}
*
* js> f\u02B1.toSource();
* function f¦() {}
*
* js> f\u02B1.toSource().toSource();
* (new String("function f\xB1() {}"))
*
*
* See how the high-byte information (the 02) has been lost?
* The same thing was happening with the toString() method:
*
* js> f\u02B1.toString();
*
* function f¦() {
* }
*
* js> f\u02B1.toString().toSource();
* (new String("\nfunction f\xB1() {\n}\n"))
*
*/
//-----------------------------------------------------------------------------
var UBound = 0;
var BUGNUMBER = 58274;
var summary = 'Testing functions with double-byte names';
var ERR = 'UNEXPECTED ERROR! \n';
var ERR_MALFORMED_NAME = ERR + 'Could not find function name in: \n\n';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
var sEval;
var sName;
sEval = "function f\u02B2() {return 42;}";
eval(sEval);
sName = getFunctionName(f\u02B2);
// Test function call -
status = inSection(1);
actual = f\u02B2();
expect = 42;
addThis();
// Test both characters of function name -
status = inSection(2);
actual = sName[0];
expect = sEval[9];
addThis();
status = inSection(3);
actual = sName[1];
expect = sEval[10];
addThis();
sEval = "function f\u02B2\u0AAA () {return 84;}";
eval(sEval);
sName = getFunctionName(f\u02B2\u0AAA);
// Test function call -
status = inSection(4);
actual = f\u02B2\u0AAA();
expect = 84;
addThis();
// Test all three characters of function name -
status = inSection(5);
actual = sName[0];
expect = sEval[9];
addThis();
status = inSection(6);
actual = sName[1];
expect = sEval[10];
addThis();
status = inSection(7);
actual = sName[2];
expect = sEval[11];
addThis();
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
/*
* Goal: test that f.toString() contains the proper function name.
*
* Note, however, f.toString() is implementation-independent. For example,
* it may begin with '\nfunction' instead of 'function'. Therefore we use
* a regexp to make sure we extract the name properly.
*
* Here we assume that f has been defined by means of a function statement,
* and not a function expression (where it wouldn't have to have a name).
*
* Rhino uses a Unicode representation for f.toString(); whereas
* SpiderMonkey uses an ASCII representation, putting escape sequences
* for non-ASCII characters. For example, if a function is called f\u02B1,
* then in Rhino the toString() method will present a 2-character Unicode
* string for its name, whereas SpiderMonkey will present a 7-character
* ASCII string for its name: the string literal 'f\u02B1'.
*
* So we force the lexer to condense the string before using it.
* This will give uniform results in Rhino and SpiderMonkey.
*/
function getFunctionName(f)
{
var s = condenseStr(f.toString());
var re = /\s*function\s+(\S+)\s*\(/;
var arr = s.match(re);
if (!(arr && arr[1]))
return ERR_MALFORMED_NAME + s;
return arr[1];
}
/*
* This function is the opposite of functions like escape(), which take
* Unicode characters and return escape sequences for them. Here, we force
* the lexer to turn escape sequences back into single characters.
*
* Note we can't simply do |eval(str)|, since in practice |str| will be an
* identifier somewhere in the program (e.g. a function name); thus |eval(str)|
* would return the object that the identifier represents: not what we want.
*
* So we surround |str| lexicographically with quotes to force the lexer to
* evaluate it as a string. Have to strip out any linefeeds first, however -
*/
function condenseStr(str)
{
/*
* You won't be able to do the next step if |str| has
* any carriage returns or linefeeds in it. For example:
*
* js> eval("'" + '\nHello' + "'");
* 1: SyntaxError: unterminated string literal:
* 1: '
* 1: ^
*
* So replace them with the empty string -
*/
str = str.replace(/[\r\n]/g, '')
return eval("'" + str + "'");
}
function addThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
function test()
{
printBugNumber(BUGNUMBER);
printStatus(summary);
for (var i=0; i<UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
}