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comparison: js/src/jit-test/tests/arrays/push-slowly-loopy-nonwritable-length.js
js/src/jit-test/tests/arrays/push-slowly-loopy-nonwritable-length.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:473eca3b2f24 |
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| 1 load(libdir + "asserts.js"); | |
| 2 | |
| 3 function f(arr, v1, v2) | |
| 4 { | |
| 5 // Ensure array_push_slowly is called by passing more than one argument. | |
| 6 arr.push(v1, v2); | |
| 7 } | |
| 8 | |
| 9 var N = 100; | |
| 10 | |
| 11 function test(out) | |
| 12 { | |
| 13 // Create an array of arrays, to be iterated over for [].push-calling. We | |
| 14 // can't just loop on push on a single array with non-writable length because | |
| 15 // push throws when called on an array with non-writable length. | |
| 16 var arrs = out.arrs = []; | |
| 17 for (var i = 0; i < N; i++) | |
| 18 arrs.push([]); | |
| 19 | |
| 20 // Use a much-greater capacity than the eventual non-writable length. | |
| 21 var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]; | |
| 22 Object.defineProperty(a, "length", { writable: false, value: 6 }); | |
| 23 | |
| 24 arrs.push(a); | |
| 25 | |
| 26 for (var i = 0, sz = arrs.length; i < sz; i++) | |
| 27 { | |
| 28 var arr = arrs[i]; | |
| 29 f(arr, 8675309, 3141592); | |
| 30 } | |
| 31 } | |
| 32 | |
| 33 var obj = {}; | |
| 34 | |
| 35 assertThrowsInstanceOf(function() { test(obj); }, TypeError); | |
| 36 | |
| 37 var arrs = obj.arrs; | |
| 38 assertEq(arrs.length, N + 1); | |
| 39 for (var i = 0; i < N; i++) | |
| 40 { | |
| 41 assertEq(arrs[i].length, 2, "unexpected length for arrs[" + i + "]"); | |
| 42 assertEq(arrs[i][0], 8675309, "bad element for arrs[" + i + "][0]"); | |
| 43 assertEq(arrs[i][1], 3141592, "bad element for arrs[" + i + "][1]"); | |
| 44 } | |
| 45 | |
| 46 var a = arrs[N]; | |
| 47 assertEq(a.hasOwnProperty(6), false); | |
| 48 assertEq(a[6], undefined); | |
| 49 assertEq(a.hasOwnProperty(7), false); | |
| 50 assertEq(a[7], undefined); | |
| 51 assertEq(a.length, 6); |
