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/Object/mutation-prevention-methods.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,124 @@
     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 +var gTestfile = 'mutation-prevention-methods.js';
    1.12 +//-----------------------------------------------------------------------------
    1.13 +var BUGNUMBER = 492849;
    1.14 +var summary = 'Object.is{Sealed,Frozen}, Object.{seal,freeze}';
    1.15 +
    1.16 +print(BUGNUMBER + ": " + summary);
    1.17 +
    1.18 +/**************
    1.19 + * BEGIN TEST *
    1.20 + **************/
    1.21 +
    1.22 +// Empty object
    1.23 +
    1.24 +var o1 = {};
    1.25 +
    1.26 +assertEq(Object.isExtensible(o1), true);
    1.27 +assertEq(Object.isSealed(o1), false);
    1.28 +assertEq(Object.isFrozen(o1), false);
    1.29 +
    1.30 +Object.preventExtensions(o1);
    1.31 +
    1.32 +// An non-extensible empty object has no properties, so it is vacuously sealed
    1.33 +// and frozen.
    1.34 +assertEq(Object.isExtensible(o1), false);
    1.35 +assertEq(Object.isSealed(o1), true);
    1.36 +assertEq(Object.isFrozen(o1), true);
    1.37 +
    1.38 +
    1.39 +// Object with a data property
    1.40 +
    1.41 +var o2 = { 1: 2 };
    1.42 +
    1.43 +assertEq(Object.isExtensible(o2), true);
    1.44 +assertEq(Object.isSealed(o2), false);
    1.45 +assertEq(Object.isFrozen(o2), false);
    1.46 +
    1.47 +Object.preventExtensions(o2);
    1.48 +
    1.49 +assertEq(Object.isExtensible(o2), false);
    1.50 +assertEq(Object.isSealed(o2), false);
    1.51 +assertEq(Object.isFrozen(o2), false);
    1.52 +
    1.53 +Object.seal(o2);
    1.54 +
    1.55 +assertEq(Object.isExtensible(o2), false);
    1.56 +assertEq(Object.isSealed(o2), true);
    1.57 +assertEq(Object.isFrozen(o2), false);
    1.58 +
    1.59 +assertEq(o2[1], 2);
    1.60 +
    1.61 +var desc;
    1.62 +
    1.63 +desc = Object.getOwnPropertyDescriptor(o2, "1");
    1.64 +assertEq(typeof desc, "object");
    1.65 +assertEq(desc.enumerable, true);
    1.66 +assertEq(desc.configurable, false);
    1.67 +assertEq(desc.value, 2);
    1.68 +assertEq(desc.writable, true);
    1.69 +
    1.70 +o2[1] = 17;
    1.71 +
    1.72 +assertEq(o2[1], 17);
    1.73 +
    1.74 +desc = Object.getOwnPropertyDescriptor(o2, "1");
    1.75 +assertEq(typeof desc, "object");
    1.76 +assertEq(desc.enumerable, true);
    1.77 +assertEq(desc.configurable, false);
    1.78 +assertEq(desc.value, 17);
    1.79 +assertEq(desc.writable, true);
    1.80 +
    1.81 +Object.freeze(o2);
    1.82 +
    1.83 +assertEq(o2[1], 17);
    1.84 +
    1.85 +desc = Object.getOwnPropertyDescriptor(o2, "1");
    1.86 +assertEq(typeof desc, "object");
    1.87 +assertEq(desc.enumerable, true);
    1.88 +assertEq(desc.configurable, false);
    1.89 +assertEq(desc.value, 17);
    1.90 +assertEq(desc.writable, false);
    1.91 +
    1.92 +
    1.93 +// Object with an accessor property
    1.94 +
    1.95 +var o3 = { get foo() { return 17; } };
    1.96 +
    1.97 +assertEq(Object.isExtensible(o3), true);
    1.98 +assertEq(Object.isSealed(o3), false);
    1.99 +assertEq(Object.isFrozen(o3), false);
   1.100 +
   1.101 +Object.preventExtensions(o3);
   1.102 +
   1.103 +assertEq(Object.isExtensible(o3), false);
   1.104 +assertEq(Object.isSealed(o3), false);
   1.105 +assertEq(Object.isFrozen(o3), false);
   1.106 +
   1.107 +Object.seal(o3);
   1.108 +
   1.109 +// An accessor property in a sealed object is unchanged if that object is
   1.110 +// frozen, so a sealed object containing only accessor properties is also
   1.111 +// vacuously frozen.
   1.112 +assertEq(Object.isExtensible(o3), false);
   1.113 +assertEq(Object.isSealed(o3), true);
   1.114 +assertEq(Object.isFrozen(o3), true);
   1.115 +
   1.116 +Object.freeze(o3);
   1.117 +
   1.118 +assertEq(Object.isExtensible(o3), false);
   1.119 +assertEq(Object.isSealed(o3), true);
   1.120 +assertEq(Object.isFrozen(o3), true);
   1.121 +
   1.122 +
   1.123 +/******************************************************************************/
   1.124 +
   1.125 +reportCompare(true, true);
   1.126 +
   1.127 +print("All tests passed!");