js/src/jit-test/tests/proxy/bug-862848-1.js@6474c204b198 (annotated)
js/src/jit-test/tests/proxy/bug-862848-1.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // obj.hasOwnProperty(id), Object.getOwnPropertyDescriptor(obj, id), and |
| michael@0 | 2 | // Object.defineProperty(obj, id, desc) do not look at obj's prototype. |
| michael@0 | 3 | |
| michael@0 | 4 | var angryHandler = new Proxy({}, { |
| michael@0 | 5 | has: () => true, |
| michael@0 | 6 | get: (t, id) => { |
| michael@0 | 7 | throw new Error("angryHandler should not be queried (" + id + ")"); |
| michael@0 | 8 | } |
| michael@0 | 9 | }); |
| michael@0 | 10 | var angryProto = new Proxy({}, angryHandler); |
| michael@0 | 11 | |
| michael@0 | 12 | var obj = Object.create(angryProto, { |
| michael@0 | 13 | // Define hasOwnProperty directly on obj since we are poisoning its |
| michael@0 | 14 | // prototype chain. |
| michael@0 | 15 | hasOwnProperty: { |
| michael@0 | 16 | value: Object.prototype.hasOwnProperty |
| michael@0 | 17 | } |
| michael@0 | 18 | }); |
| michael@0 | 19 | |
| michael@0 | 20 | assertEq(Object.getOwnPropertyDescriptor(obj, "foo"), undefined); |
| michael@0 | 21 | assertEq(obj.hasOwnProperty("foo"), false); |
| michael@0 | 22 | Object.defineProperty(obj, "foo", {value: 5}); |
| michael@0 | 23 | assertEq(obj.hasOwnProperty("foo"), true); |
| michael@0 | 24 | assertEq(obj.foo, 5); |
