The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,48 @@
     1.4 +/*
     1.5 + * Any copyright is dedicated to the Public Domain.
     1.6 + * http://creativecommons.org/licenses/publicdomain/
     1.7 + * Contributor:
     1.8 + *   Jeff Walden <jwalden+code@mit.edu>
     1.9 + */
    1.10 +
    1.11 +//-----------------------------------------------------------------------------
    1.12 +var BUGNUMBER = 858381;
    1.13 +var summary =
    1.14 +  "Array length redefinition behavior with non-configurable elements";
    1.15 +
    1.16 +print(BUGNUMBER + ": " + summary);
    1.17 +
    1.18 +/**************
    1.19 + * BEGIN TEST *
    1.20 + **************/
    1.21 +
    1.22 +var arr = [0, 1, 2];
    1.23 +Object.defineProperty(arr, 1, { configurable: false });
    1.24 +
    1.25 +try
    1.26 +{
    1.27 +  Object.defineProperty(arr, "length", { value: 0, writable: false });
    1.28 +}
    1.29 +catch (e)
    1.30 +{
    1.31 +  assertEq(e instanceof TypeError, true,
    1.32 +           "must throw TypeError when array truncation would have to remove " +
    1.33 +           "non-configurable elements");
    1.34 +}
    1.35 +
    1.36 +assertEq(arr.length, 2, "length is highest remaining index plus one");
    1.37 +
    1.38 +var desc = Object.getOwnPropertyDescriptor(arr, "length");
    1.39 +assertEq(desc !== undefined, true);
    1.40 +
    1.41 +assertEq(desc.value, 2);
    1.42 +assertEq(desc.writable, false);
    1.43 +assertEq(desc.enumerable, false);
    1.44 +assertEq(desc.configurable, false);
    1.45 +
    1.46 +/******************************************************************************/
    1.47 +
    1.48 +if (typeof reportCompare === "function")
    1.49 +  reportCompare(true, true);
    1.50 +
    1.51 +print("Tests complete");