js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js@6474c204b198 (annotated)
js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.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 | /* |
| michael@0 | 2 | * Any copyright is dedicated to the Public Domain. |
| michael@0 | 3 | * http://creativecommons.org/licenses/publicdomain/ |
| michael@0 | 4 | * Contributor: |
| michael@0 | 5 | * Jeff Walden <jwalden+code@mit.edu> |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | //----------------------------------------------------------------------------- |
| michael@0 | 9 | var BUGNUMBER = 858381; |
| michael@0 | 10 | var summary = |
| michael@0 | 11 | "Array length redefinition behavior with non-configurable elements"; |
| michael@0 | 12 | |
| michael@0 | 13 | print(BUGNUMBER + ": " + summary); |
| michael@0 | 14 | |
| michael@0 | 15 | /************** |
| michael@0 | 16 | * BEGIN TEST * |
| michael@0 | 17 | **************/ |
| michael@0 | 18 | |
| michael@0 | 19 | var arr = [0, 1, 2]; |
| michael@0 | 20 | Object.defineProperty(arr, 1, { configurable: false }); |
| michael@0 | 21 | |
| michael@0 | 22 | try |
| michael@0 | 23 | { |
| michael@0 | 24 | Object.defineProperty(arr, "length", { value: 0, writable: false }); |
| michael@0 | 25 | } |
| michael@0 | 26 | catch (e) |
| michael@0 | 27 | { |
| michael@0 | 28 | assertEq(e instanceof TypeError, true, |
| michael@0 | 29 | "must throw TypeError when array truncation would have to remove " + |
| michael@0 | 30 | "non-configurable elements"); |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | assertEq(arr.length, 2, "length is highest remaining index plus one"); |
| michael@0 | 34 | |
| michael@0 | 35 | var desc = Object.getOwnPropertyDescriptor(arr, "length"); |
| michael@0 | 36 | assertEq(desc !== undefined, true); |
| michael@0 | 37 | |
| michael@0 | 38 | assertEq(desc.value, 2); |
| michael@0 | 39 | assertEq(desc.writable, false); |
| michael@0 | 40 | assertEq(desc.enumerable, false); |
| michael@0 | 41 | assertEq(desc.configurable, false); |
| michael@0 | 42 | |
| michael@0 | 43 | /******************************************************************************/ |
| michael@0 | 44 | |
| michael@0 | 45 | if (typeof reportCompare === "function") |
| michael@0 | 46 | reportCompare(true, true); |
| michael@0 | 47 | |
| michael@0 | 48 | print("Tests complete"); |
