The Tor Browser / file comparison
comparison: js/src/tests/js1_8_5/extensions/array-length-protochange.js
js/src/tests/js1_8_5/extensions/array-length-protochange.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:41e0feb237af |
|---|---|
| 1 // Any copyright is dedicated to the Public Domain. | |
| 2 // http://creativecommons.org/licenses/publicdomain/ | |
| 3 | |
| 4 //----------------------------------------------------------------------------- | |
| 5 var BUGNUMBER = 548671; | |
| 6 var summary = | |
| 7 "Don't use a shared-permanent inherited property to implement " + | |
| 8 "[].length or (function(){}).length"; | |
| 9 | |
| 10 print(BUGNUMBER + ": " + summary); | |
| 11 | |
| 12 /************** | |
| 13 * BEGIN TEST * | |
| 14 **************/ | |
| 15 | |
| 16 var a = [1, 2, 3]; | |
| 17 a.__proto__ = null; | |
| 18 reportCompare("length" in a, true, "length should be own property of array"); | |
| 19 reportCompare(Object.hasOwnProperty.call(a, "length"), true, | |
| 20 "length should be own property of array"); | |
| 21 reportCompare(a.length, 3, "array length should be 3"); | |
| 22 | |
| 23 var a = [], b = []; | |
| 24 b.__proto__ = a; | |
| 25 reportCompare(b.hasOwnProperty("length"), true, | |
| 26 "length should be own property of array"); | |
| 27 b.length = 42; | |
| 28 reportCompare(b.length, 42, "should have mutated b's (own) length"); | |
| 29 reportCompare(a.length, 0, "should not have mutated a's (own) length"); | |
| 30 | |
| 31 | |
| 32 if (typeof reportCompare === "function") | |
| 33 reportCompare(true, true); | |
| 34 | |
| 35 print("All tests passed!"); |
