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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 *
 * Date:    22 Jan 2002
 * SUMMARY: Testing Error.prototype.toString()
 *
 * Revised: 25 Nov 2002
 * See http://bugzilla.mozilla.org/show_bug.cgi?id=181909
 *
 * Note that ECMA-262 3rd Edition Final, Section 15.11.4.4 states that
 * Error.prototype.toString() returns an implementation-dependent string.
 * Therefore any testcase on this property is somewhat arbitrary.
 *
 * However, [email protected] pointed out that Rhino was returning this:
 *
 *               js> err = new Error()
 *               undefined: undefined
 *
 *               js> err = new Error("msg")
 *               undefined: msg
 *
 *
 * We expect Rhino to return what SpiderMonkey currently does:
 *
 *               js> err = new Error()
 *               Error
 *
 *               js> err = new Error("msg")
 *               Error: msg
 *
 *
 * i.e. we expect err.toString() === err.name if err.message is not defined;
 * otherwise, we expect err.toString() === err.name + ': ' + err.message.
 *
 * See also ECMA 15.11.4.2, 15.11.4.3
 */
//-----------------------------------------------------------------------------
var gTestfile = '15.11.4.4-1.js';
var UBound = 0;
var BUGNUMBER = '(none)';
var summary = 'Testing Error.prototype.toString()';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
var EMPTY_STRING = '';
var EXPECTED_FORMAT = 0;


status = inSection(1);
var err1 = new Error('msg1');
actual = examineThis(err1, 'msg1');
expect = EXPECTED_FORMAT;
addThis();

status = inSection(2);
var err2 = new Error(err1);
actual = examineThis(err2, err1);
expect = EXPECTED_FORMAT;
addThis();

status = inSection(3);
var err3 = new Error();
actual = examineThis(err3, EMPTY_STRING);
expect = EXPECTED_FORMAT;
addThis();

status = inSection(4);
var err4 = new Error(EMPTY_STRING);
actual = examineThis(err4, EMPTY_STRING);
expect = EXPECTED_FORMAT;
addThis();

// now generate a run-time error -
status = inSection(5);
try
{
  eval('1=2');
}
catch(err5)
{
  actual = examineThis(err5, '.*');
}
expect = EXPECTED_FORMAT;
addThis();



//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------



/*
 * Searches err.toString() for err.name + ':' + err.message,
 * with possible whitespace on each side of the colon sign.
 *
 * We allow for no colon in case err.message was not provided by the user.
 * In such a case, SpiderMonkey and Rhino currently set err.message = '',
 * as allowed for by ECMA 15.11.4.3. This makes |pattern| work in this case.
 *
 * If this is ever changed to a non-empty string, e.g. 'undefined',
 * you may have to modify |pattern| to take that into account -
 *
 */
function examineThis(err, msg)
{
  var pattern = err.name + '\\s*:?\\s*' + msg;
  return err.toString().search(RegExp(pattern));
}


function addThis()
{
  statusitems[UBound] = status;
  actualvalues[UBound] = actual;
  expectedvalues[UBound] = expect;
  UBound++;
}


function test()
{
  enterFunc ('test');
  printBugNumber(BUGNUMBER);
  printStatus (summary);

  for (var i = 0; i < UBound; i++)
  {
    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
  }

  exitFunc ('test');
}