js/src/jit-test/tests/collections/Array-of-length-setter-2.js@6474c204b198 (annotated)
js/src/jit-test/tests/collections/Array-of-length-setter-2.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 | // Array.of does a strict assignment to the new object's .length. |
| michael@0 | 2 | // The assignment is strict even if the code we're calling from is not strict. |
| michael@0 | 3 | |
| michael@0 | 4 | load(libdir + "asserts.js"); |
| michael@0 | 5 | |
| michael@0 | 6 | function Empty() {} |
| michael@0 | 7 | Empty.of = Array.of; |
| michael@0 | 8 | Object.defineProperty(Empty.prototype, "length", {get: () => 0}); |
| michael@0 | 9 | |
| michael@0 | 10 | var nothing = new Empty; |
| michael@0 | 11 | nothing.length = 2; // no exception; this is not a strict mode assignment |
| michael@0 | 12 | |
| michael@0 | 13 | assertThrowsInstanceOf(() => Empty.of(), TypeError); |
