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comparison: js/src/jit-test/tests/arrays/ion-pop-nonwritable-length.js
js/src/jit-test/tests/arrays/ion-pop-nonwritable-length.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:6b0510b1285f |
|---|---|
| 1 load(libdir + "asserts.js"); | |
| 2 | |
| 3 function f(arr) | |
| 4 { | |
| 5 arr.pop(); | |
| 6 } | |
| 7 | |
| 8 var N = 100; | |
| 9 | |
| 10 function test(out) | |
| 11 { | |
| 12 // Create an array of arrays, to be iterated over for [].pop-calling. We | |
| 13 // can't just loop on pop on a single array with non-writable length because | |
| 14 // pop throws when called on an array with non-writable length. | |
| 15 var arrs = out.arrs = []; | |
| 16 for (var i = 0; i < N; i++) | |
| 17 arrs.push([0, 1, 2, 3]); | |
| 18 | |
| 19 // Use a much-greater capacity than the eventual non-writable length. | |
| 20 var a = [0, 1, 2, 3, 4, 5, 6, 7]; | |
| 21 Object.defineProperty(a, "length", { writable: false, value: 4 }); | |
| 22 | |
| 23 arrs.push(a); | |
| 24 | |
| 25 for (var i = 0, sz = arrs.length; i < sz; i++) | |
| 26 f(arrs[i]); | |
| 27 } | |
| 28 | |
| 29 var obj = {}; | |
| 30 | |
| 31 assertThrowsInstanceOf(function() { test(obj); }, TypeError); | |
| 32 | |
| 33 var arrs = obj.arrs; | |
| 34 assertEq(arrs.length, N + 1); | |
| 35 for (var i = 0; i < N; i++) | |
| 36 { | |
| 37 assertEq(arrs[i].length, 3, "unexpected length for arrs[" + i + "]"); | |
| 38 assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]"); | |
| 39 assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]"); | |
| 40 assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]"); | |
| 41 assertEq(3 in arrs[i], false, "shouldn't be a third element"); | |
| 42 assertEq(arrs[i][3], undefined); | |
| 43 } | |
| 44 | |
| 45 var a = arrs[N]; | |
| 46 assertEq(a.hasOwnProperty(3), false, "should have been deleted before throw"); | |
| 47 assertEq(a[3], undefined); | |
| 48 assertEq(a.length, 4, "length shouldn't have been changed"); |
