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277 lines
7.6 KiB
JavaScript
277 lines
7.6 KiB
JavaScript
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is JavaScript Engine testing utilities.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* rogerl@netscape.com, pschwartau@netscape.com
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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*
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* Date: 15 July 2002
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* SUMMARY: Testing identifiers with double-byte names
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* See http://bugzilla.mozilla.org/show_bug.cgi?id=58274
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*
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* Here is a sample of the problem:
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*
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* js> function f\u02B1 () {}
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*
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* js> f\u02B1.toSource();
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* function f<>() {}
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*
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* js> f\u02B1.toSource().toSource();
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* (new String("function f\xB1() {}"))
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*
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*
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* See how the high-byte information (the 02) has been lost?
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* The same thing was happening with the toString() method:
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*
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* js> f\u02B1.toString();
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*
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* function f<>() {
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* }
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*
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* js> f\u02B1.toString().toSource();
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* (new String("\nfunction f\xB1() {\n}\n"))
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*
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*/
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//-----------------------------------------------------------------------------
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var gTestfile = 'uc-005.js';
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var UBound = 0;
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var BUGNUMBER = 58274;
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var summary = 'Testing identifiers with double-byte names';
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var status = '';
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var statusitems = [];
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var actual = '';
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var actualvalues = [];
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var expect= '';
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var expectedvalues = [];
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/*
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* Define a function that uses double-byte identifiers in
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* "every possible way"
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*
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* Then recover each double-byte identifier via f.toString().
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* To make this easier, put a 'Z' token before every one.
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*
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* Our eval string will be:
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*
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* sEval = "function Z\u02b1(Z\u02b2, b) {
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* try { Z\u02b3 : var Z\u02b4 = Z\u02b1; }
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* catch (Z\u02b5) { for (var Z\u02b6 in Z\u02b5)
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* {for (1; 1<0; Z\u02b7++) {new Array()[Z\u02b6] = 1;} };} }";
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*
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* It will be helpful to build this string in stages:
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*/
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var s0 = 'function Z';
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var s1 = '\u02b1(Z';
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var s2 = '\u02b2, b) {try { Z';
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var s3 = '\u02b3 : var Z';
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var s4 = '\u02b4 = Z';
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var s5 = '\u02b1; } catch (Z'
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var s6 = '\u02b5) { for (var Z';
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var s7 = '\u02b6 in Z';
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var s8 = '\u02b5){for (1; 1<0; Z';
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var s9 = '\u02b7++) {new Array()[Z';
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var s10 = '\u02b6] = 1;} };} }';
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/*
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* Concatenate these and eval() to create the function Z\u02b1
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*/
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var sEval = s0 + s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10;
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eval(sEval);
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/*
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* Recover all the double-byte identifiers via Z\u02b1.toString().
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* We'll recover the 1st one as arrID[1], the 2nd one as arrID[2],
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* and so on ...
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*/
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var arrID = getIdentifiers(Z\u02b1);
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/*
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* Now check that we got back what we put in -
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*/
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status = inSection(1);
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actual = arrID[1];
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expect = s1.charAt(0);
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addThis();
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status = inSection(2);
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actual = arrID[2];
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expect = s2.charAt(0);
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addThis();
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status = inSection(3);
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actual = arrID[3];
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expect = s3.charAt(0);
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addThis();
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status = inSection(4);
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actual = arrID[4];
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expect = s4.charAt(0);
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addThis();
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status = inSection(5);
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actual = arrID[5];
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expect = s5.charAt(0);
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addThis();
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status = inSection(6);
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actual = arrID[6];
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expect = s6.charAt(0);
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addThis();
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status = inSection(7);
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actual = arrID[7];
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expect = s7.charAt(0);
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addThis();
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status = inSection(8);
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actual = arrID[8];
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expect = s8.charAt(0);
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addThis();
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status = inSection(9);
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actual = arrID[9];
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expect = s9.charAt(0);
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addThis();
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status = inSection(10);
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actual = arrID[10];
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expect = s10.charAt(0);
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addThis();
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//-----------------------------------------------------------------------------
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test();
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//-----------------------------------------------------------------------------
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/*
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* Goal: recover the double-byte identifiers from f.toString()
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* by getting the very next character after each 'Z' token.
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*
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* The return value will be an array |arr| indexed such that
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* |arr[1]| is the 1st identifier, |arr[2]| the 2nd, and so on.
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*
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* Note, however, f.toString() is implementation-independent.
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* For example, it may begin with '\nfunction' instead of 'function'.
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*
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* Rhino uses a Unicode representation for f.toString(); whereas
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* SpiderMonkey uses an ASCII representation, putting escape sequences
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* for non-ASCII characters. For example, if a function is called f\u02B1,
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* then in Rhino the toString() method will present a 2-character Unicode
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* string for its name, whereas SpiderMonkey will present a 7-character
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* ASCII string for its name: the string literal 'f\u02B1'.
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*
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* So we force the lexer to condense the string before we use it.
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* This will give uniform results in Rhino and SpiderMonkey.
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*/
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function getIdentifiers(f)
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{
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var str = condenseStr(f.toString());
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var arr = str.split('Z');
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/*
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* The identifiers are the 1st char of each split substring
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* EXCEPT the first one, which is just ('\n' +) 'function '.
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*
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* Thus note the 1st identifier will be stored in |arr[1]|,
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* the 2nd one in |arr[2]|, etc., making the indexing easy -
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*/
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for (i in arr)
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arr[i] = arr[i].charAt(0);
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return arr;
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}
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/*
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* This function is the opposite of a functions like escape(), which take
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* Unicode characters and return escape sequences for them. Here, we force
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* the lexer to turn escape sequences back into single characters.
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*
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* Note we can't simply do |eval(str)|, since in practice |str| will be an
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* identifier somewhere in the program (e.g. a function name); thus |eval(str)|
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* would return the object that the identifier represents: not what we want.
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*
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* So we surround |str| lexicographically with quotes to force the lexer to
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* evaluate it as a string. Have to strip out any linefeeds first, however -
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*/
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function condenseStr(str)
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{
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/*
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* You won't be able to do the next step if |str| has
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* any carriage returns or linefeeds in it. For example:
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*
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* js> eval("'" + '\nHello' + "'");
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* 1: SyntaxError: unterminated string literal:
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* 1: '
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* 1: ^
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*
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* So replace them with the empty string -
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*/
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str = str.replace(/[\r\n]/g, '')
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return eval("'" + str + "'")
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}
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function addThis()
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{
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statusitems[UBound] = status;
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actualvalues[UBound] = actual;
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expectedvalues[UBound] = expect;
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UBound++;
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}
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function test()
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{
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enterFunc('test');
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printBugNumber(BUGNUMBER);
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printStatus(summary);
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for (var i=0; i<UBound; i++)
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{
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reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
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}
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exitFunc ('test');
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}
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