| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>window.opener setter throws TypeError if [[DefineOwnProperty]] fails</title> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/browsers.html#dom-opener"> |
| |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| |
| <body> |
| <script> |
| test(() => { |
| Object.defineProperty(window, "opener", { configurable: false }); |
| assert_throws_js(TypeError, () => { window.opener = 1; }); |
| |
| const desc = Object.getOwnPropertyDescriptor(window, "opener"); |
| assert_false("value" in desc); |
| assert_equals(typeof desc.get, "function"); |
| assert_equals(typeof desc.set, "function"); |
| assert_true(desc.enumerable); |
| assert_false(desc.configurable); |
| }, "window.opener setter throws TypeError if called on non-configurable accessor property"); |
| </script> |
