| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Same-origin Location objects have non-configurable "toString" and "valueOf" properties</title> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/history.html#location-defineownproperty"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <script> |
| "use strict"; |
| |
| test(() => { |
| assert_own_property(location, "toString"); |
| const origToString = location.toString; |
| |
| assert_throws_js(TypeError, () => { |
| Object.defineProperty(location, "toString", { |
| get() {}, |
| set(_v) {}, |
| enumerable: true, |
| configurable: true, |
| }); |
| }); |
| |
| assert_equals(location.toString, origToString); |
| }, "'toString' redefinition with accessor fails"); |
| |
| test(() => { |
| assert_own_property(location, "valueOf"); |
| const origValueOf = location.valueOf; |
| |
| assert_throws_js(TypeError, () => { |
| Object.defineProperty(location, "valueOf", { |
| get() {}, |
| enumerable: false, |
| configurable: true, |
| }); |
| }); |
| |
| assert_equals(location.valueOf, origValueOf); |
| }, "'valueOf' redefinition with accessor fails"); |
| </script> |
