The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/test262/ch11/11.4/11.4.1/11.4.4-4.a-3-s.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,32 @@
     1.4 +/// Copyright (c) 2012 Ecma International.  All rights reserved. 
     1.5 +/// Ecma International makes this code available under the terms and conditions set
     1.6 +/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
     1.7 +/// "Use Terms").   Any redistribution of this code must retain the above 
     1.8 +/// copyright and this notice and otherwise comply with the Use Terms.
     1.9 +/**
    1.10 + * This test is actually testing the [[Delete]] internal method (8.12.8). Since the
    1.11 + * language provides no way to directly exercise [[Delete]], the tests are placed here.
    1.12 + *
    1.13 + * @path ch11/11.4/11.4.1/11.4.4-4.a-3-s.js
    1.14 + * @description delete operator throws TypeError when deleting a non-configurable data property in strict mode
    1.15 + * @onlyStrict
    1.16 + */
    1.17 +
    1.18 +
    1.19 +function testcase() {
    1.20 +  'use strict';
    1.21 +
    1.22 +  var o = {};
    1.23 +  var desc = { value : 1 }; // all other attributes default to false
    1.24 +  Object.defineProperty(o, "foo", desc);
    1.25 +  
    1.26 +  // Now, deleting o.foo should throw TypeError because [[Configurable]] on foo is false.
    1.27 +  try {
    1.28 +    delete o.foo;
    1.29 +    return false;
    1.30 +  }
    1.31 +  catch (e) {
    1.32 +    return (e instanceof TypeError);
    1.33 +  }
    1.34 + }
    1.35 +runTestCase(testcase);