src/third_party/mozjs-45/js/src/tests/ecma_5/String/match-throws-nonwritable-lastIndex-global.js

/*
 * Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/licenses/publicdomain/
 */

var BUGNUMBER = 501739;
var summary =
  "String.prototype.match should throw when called with a global RegExp " +
  "whose .lastIndex is non-writable";

print(BUGNUMBER + ": " + summary);

/**************
 * BEGIN TEST *
 **************/

var s = '0x2x4x6x8';

// First time with .lastIndex === 0

var p1 = /x/g;
Object.defineProperty(p1, "lastIndex", { writable: false });

try
{
  s.match(p1);
  throw "didn't throw";
}
catch (e)
{
  assertEq(e instanceof TypeError, true,
           "should have thrown a TypeError, instead got: " + e);
}

// Second time with .lastIndex !== 0

var p2 = /x/g;
Object.defineProperty(p2, "lastIndex", { writable: false, value: 3 });

try
{
  s.match(p2);
  throw "didn't throw";
}
catch (e)
{
  assertEq(e instanceof TypeError, true,
           "should have thrown a TypeError, instead got: " + e);
}

// Third time with .lastIndex === 0, no matches

var p3 = /q/g;
Object.defineProperty(p3, "lastIndex", { writable: false });

try
{
  s.match(p3);
  throw "didn't throw";
}
catch (e)
{
  assertEq(e instanceof TypeError, true,
           "should have thrown a TypeError, instead got: " + e);
}

// Fourth time with .lastIndex !== 0, no matches

var p4 = /q/g;
Object.defineProperty(p4, "lastIndex", { writable: false, value: 3 });

try
{
  s.match(p4);
  throw "didn't throw";
}
catch (e)
{
  assertEq(e instanceof TypeError, true,
           "should have thrown a TypeError, instead got: " + e);
}

/******************************************************************************/

if (typeof reportCompare === "function")
  reportCompare(true, true);

print("Tests complete");