length-01.js - mozsearch

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/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

 * Contributor:

 *   Jeff Walden <jwalden+code@mit.edu>

*/

//-----------------------------------------------------------------------------

var BUGNUMBER = 600392;

var summary =

  'Object.preventExtensions([]).length = 0 should do nothing, not throw';

print(BUGNUMBER + ": " + summary);

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

 * BEGIN TEST *

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

function testEmpty()

  var a = [];

  assertEq(a.length, 0);

  assertEq(Object.preventExtensions(a), a);

  assertEq(a.length, 0);

  a.length = 0;

  assertEq(a.length, 0);

testEmpty();

function testEmptyStrict()

  "use strict";

  var a = [];

  assertEq(a.length, 0);

  assertEq(Object.preventExtensions(a), a);

  assertEq(a.length, 0);

  a.length = 0;

  assertEq(a.length, 0);

testEmptyStrict();

function testNonEmpty()

  var a = [1, 2, 3];

  assertEq(a.length, 3);

  assertEq(Object.preventExtensions(a), a);

  assertEq(a.length, 3);

  a.length = 0;

  assertEq(a.length, 0);

testNonEmpty();

function testNonEmptyStrict()

  "use strict";

  var a = [1, 2, 3];

  assertEq(a.length, 3);

  assertEq(Object.preventExtensions(a), a);

  assertEq(a.length, 3);

  a.length = 0;

  assertEq(a.length, 0);

testNonEmptyStrict();

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

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("All tests passed!");