'use strict'; // Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- info: | This test is actually testing the [[Delete]] internal method (8.12.8). Since the language provides no way to directly exercise [[Delete]], the tests are placed here. esid: sec-delete-operator-runtime-semantics-evaluation description: > delete operator throws TypeError when deleting a non-configurable data property in strict mode flags: [onlyStrict] ---*/ var o = {}; var desc = { value: 1, }; // all other attributes default to false Object.defineProperty(o, 'foo', desc); // Now, deleting o.foo should throw TypeError because [[Configurable]] on foo is false. assert.throws(TypeError, function() { delete o.foo; }); reportCompare(0, 0);