| /* |
| * Any copyright is dedicated to the Public Domain. |
| * http://creativecommons.org/licenses/publicdomain/ |
| * Contributor: |
| * Jeff Walden <jwalden+code@mit.edu> |
| */ |
| |
| //----------------------------------------------------------------------------- |
| var BUGNUMBER = 858381; |
| var summary = |
| "Array length redefinition behavior with non-configurable elements"; |
| |
| print(BUGNUMBER + ": " + summary); |
| |
| /************** |
| * BEGIN TEST * |
| **************/ |
| |
| var arr = [0, 1, 2]; |
| Object.defineProperty(arr, 1, { configurable: false }); |
| |
| try |
| { |
| Object.defineProperty(arr, "length", { value: 0, writable: false }); |
| } |
| catch (e) |
| { |
| assertEq(e instanceof TypeError, true, |
| "must throw TypeError when array truncation would have to remove " + |
| "non-configurable elements"); |
| } |
| |
| assertEq(arr.length, 2, "length is highest remaining index plus one"); |
| |
| var desc = Object.getOwnPropertyDescriptor(arr, "length"); |
| assertEq(desc !== undefined, true); |
| |
| assertEq(desc.value, 2); |
| assertEq(desc.writable, false); |
| assertEq(desc.enumerable, false); |
| assertEq(desc.configurable, false); |
| |
| /******************************************************************************/ |
| |
| if (typeof reportCompare === "function") |
| reportCompare(true, true); |
| |
| print("Tests complete"); |