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comparison: js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js
js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js
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| -1:000000000000 | 0:97b6e0635b30 |
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| 1 /* | |
| 2 * Any copyright is dedicated to the Public Domain. | |
| 3 * http://creativecommons.org/licenses/publicdomain/ | |
| 4 * Contributor: | |
| 5 * Jeff Walden <jwalden+code@mit.edu> | |
| 6 */ | |
| 7 | |
| 8 //----------------------------------------------------------------------------- | |
| 9 var BUGNUMBER = 858381; | |
| 10 var summary = | |
| 11 "Array length redefinition behavior with non-configurable elements"; | |
| 12 | |
| 13 print(BUGNUMBER + ": " + summary); | |
| 14 | |
| 15 /************** | |
| 16 * BEGIN TEST * | |
| 17 **************/ | |
| 18 | |
| 19 var arr = [0, 1, 2]; | |
| 20 Object.defineProperty(arr, 1, { configurable: false }); | |
| 21 | |
| 22 try | |
| 23 { | |
| 24 Object.defineProperty(arr, "length", { value: 0, writable: false }); | |
| 25 } | |
| 26 catch (e) | |
| 27 { | |
| 28 assertEq(e instanceof TypeError, true, | |
| 29 "must throw TypeError when array truncation would have to remove " + | |
| 30 "non-configurable elements"); | |
| 31 } | |
| 32 | |
| 33 assertEq(arr.length, 2, "length is highest remaining index plus one"); | |
| 34 | |
| 35 var desc = Object.getOwnPropertyDescriptor(arr, "length"); | |
| 36 assertEq(desc !== undefined, true); | |
| 37 | |
| 38 assertEq(desc.value, 2); | |
| 39 assertEq(desc.writable, false); | |
| 40 assertEq(desc.enumerable, false); | |
| 41 assertEq(desc.configurable, false); | |
| 42 | |
| 43 /******************************************************************************/ | |
| 44 | |
| 45 if (typeof reportCompare === "function") | |
| 46 reportCompare(true, true); | |
| 47 | |
| 48 print("Tests complete"); |
