blob: f87a5a2dfdd66dff2abd318c8628c22b1733d927 [file] [log] [blame]
// Copyright (c) 2012 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es5id: 11.13.2-27-s
description: >
Strict Mode - TypeError is thrown if The LeftHandSide of a
Compound Assignment operator(-=) is a reference to a data property
with the attribute value {[[Writable]]:false}
flags: [onlyStrict]
---*/
var obj = {};
Object.defineProperty(obj, "prop", {
value: 10,
writable: false,
enumerable: true,
configurable: true
});
assert.throws(TypeError, function() {
obj.prop -= 20;
});
assert.sameValue(obj.prop, 10, 'obj.prop');