src/third_party/mozjs-45/js/src/tests/js1_5/Regress/regress-383674.js

/* -*- 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
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

//-----------------------------------------------------------------------------
var BUGNUMBER = 383674;
var summary = 'Statement that implicitly calls toString should not be optimized away as a "useless expression"';
var actual = '';
var expect = '';


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

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

  options("strict");
  options("werror");

  expect = 'toString called';
  actual = 'toString not called';
  try
  {
    var x = {toString: function() {
        actual = 'toString called';
        print(actual);
      }
    };
    var f = function() { var j = x; j + ""; }
    f();
    reportCompare(expect, actual, summary + ': 1');
  }
  catch(ex)
  {
    reportCompare("No Error", ex + "", summary + ': 1');
  }

  actual = 'toString not called';
  try
  {
    (function() { var a =
         ({toString: function(){
             actual = 'toString called'; print(actual)} }); a += ""; })();
    reportCompare(expect, actual, summary + ': 2');
  }
  catch(ex)
  {
    reportCompare("No Error", ex + "", summary + ': 2');
  }

  exitFunc ('test');
}