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comparison: js/src/jit-test/tests/arrays/ion-push-nonwritable-length.js
js/src/jit-test/tests/arrays/ion-push-nonwritable-length.js
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- 6474c204b198
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| -1:000000000000 | 0:a62d1eb41022 |
|---|---|
| 1 function f(arr) | |
| 2 { | |
| 3 assertEq(arr.push(4), 5); // if it doesn't throw :-) | |
| 4 } | |
| 5 | |
| 6 function test(out) | |
| 7 { | |
| 8 // Create an array of arrays, to be iterated over for [].push-calling. We | |
| 9 // can't just loop on push on a single array with non-writable length because | |
| 10 // push throws when called on an array with non-writable length. | |
| 11 var arrs = out.arrs = []; | |
| 12 for (var i = 0; i < 100; i++) | |
| 13 arrs.push([0, 1, 2, 3]); | |
| 14 | |
| 15 // Use a much-greater capacity than the eventual non-writable length, so that | |
| 16 // the inline-push will work. | |
| 17 var a = [0, 1, 2, 3, 4, 5, 6, 7]; | |
| 18 Object.defineProperty(a, "length", { writable: false, value: 4 }); | |
| 19 | |
| 20 arrs.push(a); | |
| 21 | |
| 22 for (var i = 0, sz = arrs.length; i < sz; i++) | |
| 23 { | |
| 24 var arr = arrs[i]; | |
| 25 f(arr); | |
| 26 } | |
| 27 } | |
| 28 | |
| 29 var obj = {}; | |
| 30 var a, arrs; | |
| 31 | |
| 32 try | |
| 33 { | |
| 34 test(obj); | |
| 35 throw new Error("didn't throw!"); | |
| 36 } | |
| 37 catch (e) | |
| 38 { | |
| 39 assertEq(e instanceof TypeError, true, "expected TypeError, got " + e); | |
| 40 | |
| 41 arrs = obj.arrs; | |
| 42 assertEq(arrs.length, 101); | |
| 43 for (var i = 0; i < 100; i++) | |
| 44 { | |
| 45 assertEq(arrs[i].length, 5, "unexpected length for arrs[" + i + "]"); | |
| 46 assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]"); | |
| 47 assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]"); | |
| 48 assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]"); | |
| 49 assertEq(arrs[i][3], 3, "bad element for arrs[" + i + "][3]"); | |
| 50 assertEq(arrs[i][4], 4, "bad element for arrs[" + i + "][4]"); | |
| 51 } | |
| 52 | |
| 53 a = arrs[100]; | |
| 54 assertEq(a[0], 0, "bad element for a[" + i + "]"); | |
| 55 assertEq(a[1], 1, "bad element for a[" + i + "]"); | |
| 56 assertEq(a[2], 2, "bad element for a[" + i + "]"); | |
| 57 assertEq(a[3], 3, "bad element for a[" + i + "]"); | |
| 58 assertEq(a.hasOwnProperty(4), false, "element addition should have thrown"); | |
| 59 assertEq(a[4], undefined); | |
| 60 assertEq(a.length, 4, "length shouldn't have been changed"); | |
| 61 } |
