michael@0: /// Copyright (c) 2012 Ecma International.  All rights reserved. 
michael@0: /// Ecma International makes this code available under the terms and conditions set
michael@0: /// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
michael@0: /// "Use Terms").   Any redistribution of this code must retain the above 
michael@0: /// copyright and this notice and otherwise comply with the Use Terms.
michael@0: /**
michael@0:  * This test is actually testing the [[Delete]] internal method (8.12.8). Since the
michael@0:  * language provides no way to directly exercise [[Delete]], the tests are placed here.
michael@0:  *
michael@0:  * @path ch11/11.4/11.4.1/11.4.4-4.a-3-s.js
michael@0:  * @description delete operator throws TypeError when deleting a non-configurable data property in strict mode
michael@0:  * @onlyStrict
michael@0:  */
michael@0: 
michael@0: 
michael@0: function testcase() {
michael@0:   'use strict';
michael@0: 
michael@0:   var o = {};
michael@0:   var desc = { value : 1 }; // all other attributes default to false
michael@0:   Object.defineProperty(o, "foo", desc);
michael@0:   
michael@0:   // Now, deleting o.foo should throw TypeError because [[Configurable]] on foo is false.
michael@0:   try {
michael@0:     delete o.foo;
michael@0:     return false;
michael@0:   }
michael@0:   catch (e) {
michael@0:     return (e instanceof TypeError);
michael@0:   }
michael@0:  }
michael@0: runTestCase(testcase);