js/src/jit-test/tests/for-of/array-holes-slow.js@6474c204b198 (annotated)
js/src/jit-test/tests/for-of/array-holes-slow.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 | // for-of on a slow Array consults the prototype chain when it encounters a hole. |
| michael@0 | 2 | |
| michael@0 | 3 | var a = [0, , , 3]; |
| michael@0 | 4 | a.slow = true; |
| michael@0 | 5 | Object.prototype[1] = 'peek1'; |
| michael@0 | 6 | Array.prototype[2] = 'peek2'; |
| michael@0 | 7 | |
| michael@0 | 8 | var log = []; |
| michael@0 | 9 | for (var x of a) |
| michael@0 | 10 | log.push(x); |
| michael@0 | 11 | assertEq(log[1], 'peek1'); |
| michael@0 | 12 | assertEq(log[2], 'peek2'); |
| michael@0 | 13 | assertEq(log.join(), "0,peek1,peek2,3"); |
