The Tor Browser / file comparison
comparison: js/src/tests/ecma_6/Array/for_of_2.js
js/src/tests/ecma_6/Array/for_of_2.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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deleted
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| -1:000000000000 | 0:936fa14ad18d |
|---|---|
| 1 // Test corner cases of for-of iteration over Arrays. | |
| 2 // The current spidermonky JSOP_SPREAD implementation for function calls | |
| 3 // with '...rest' arguments uses a ForOfIterator to extract values from | |
| 4 // the array, so we use that mechanism to test ForOfIterator here. | |
| 5 | |
| 6 // | |
| 7 // Check case where ArrayIterator.prototype.next changes in the middle of iteration. | |
| 8 // | |
| 9 function TestChangeArrayIteratorNext() { | |
| 10 function doIter(f, arr) { | |
| 11 return f(...arr) | |
| 12 } | |
| 13 | |
| 14 function fun(a, b, c) { | |
| 15 var result = 0; | |
| 16 for (var i = 0; i < arguments.length; i++) | |
| 17 result += arguments[i]; | |
| 18 return result; | |
| 19 } | |
| 20 | |
| 21 var GET_COUNT = 0; | |
| 22 function getter() { | |
| 23 GET_COUNT++; | |
| 24 if (GET_COUNT == MID) | |
| 25 iterProto.next = NewNext; | |
| 26 return M2; | |
| 27 } | |
| 28 | |
| 29 var iter = ([])['@@iterator'](); | |
| 30 var iterProto = Object.getPrototypeOf(iter); | |
| 31 var OldNext = iterProto.next; | |
| 32 var NewNext = function () { | |
| 33 return OldNext.apply(this, arguments); | |
| 34 }; | |
| 35 | |
| 36 var TRUE_SUM = 0; | |
| 37 var N = 100; | |
| 38 var MID = N/2; | |
| 39 var M = 3; | |
| 40 var arr = new Array(M); | |
| 41 var ARR_SUM = 0; | |
| 42 for (var j = 0; j < M; j++) { | |
| 43 arr[j] = j; | |
| 44 ARR_SUM += j; | |
| 45 } | |
| 46 var M2 = (M/2)|0; | |
| 47 Object.defineProperty(arr, M2, {'get':getter}); | |
| 48 | |
| 49 var sum = 0; | |
| 50 for (var i = 0; i < N; i++) { | |
| 51 sum += doIter(fun, arr); | |
| 52 TRUE_SUM += ARR_SUM; | |
| 53 } | |
| 54 assertEq(sum, TRUE_SUM); | |
| 55 } | |
| 56 TestChangeArrayIteratorNext(); | |
| 57 | |
| 58 if (typeof reportCompare === "function") | |
| 59 reportCompare(true, true); |
