js/src/jit-test/tests/arrays/ion-push-nonwritable-length.js@6474c204b198 (annotated)
js/src/jit-test/tests/arrays/ion-push-nonwritable-length.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | function f(arr) |
| michael@0 | 2 | { |
| michael@0 | 3 | assertEq(arr.push(4), 5); // if it doesn't throw :-) |
| michael@0 | 4 | } |
| michael@0 | 5 | |
| michael@0 | 6 | function test(out) |
| michael@0 | 7 | { |
| michael@0 | 8 | // Create an array of arrays, to be iterated over for [].push-calling. We |
| michael@0 | 9 | // can't just loop on push on a single array with non-writable length because |
| michael@0 | 10 | // push throws when called on an array with non-writable length. |
| michael@0 | 11 | var arrs = out.arrs = []; |
| michael@0 | 12 | for (var i = 0; i < 100; i++) |
| michael@0 | 13 | arrs.push([0, 1, 2, 3]); |
| michael@0 | 14 | |
| michael@0 | 15 | // Use a much-greater capacity than the eventual non-writable length, so that |
| michael@0 | 16 | // the inline-push will work. |
| michael@0 | 17 | var a = [0, 1, 2, 3, 4, 5, 6, 7]; |
| michael@0 | 18 | Object.defineProperty(a, "length", { writable: false, value: 4 }); |
| michael@0 | 19 | |
| michael@0 | 20 | arrs.push(a); |
| michael@0 | 21 | |
| michael@0 | 22 | for (var i = 0, sz = arrs.length; i < sz; i++) |
| michael@0 | 23 | { |
| michael@0 | 24 | var arr = arrs[i]; |
| michael@0 | 25 | f(arr); |
| michael@0 | 26 | } |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | var obj = {}; |
| michael@0 | 30 | var a, arrs; |
| michael@0 | 31 | |
| michael@0 | 32 | try |
| michael@0 | 33 | { |
| michael@0 | 34 | test(obj); |
| michael@0 | 35 | throw new Error("didn't throw!"); |
| michael@0 | 36 | } |
| michael@0 | 37 | catch (e) |
| michael@0 | 38 | { |
| michael@0 | 39 | assertEq(e instanceof TypeError, true, "expected TypeError, got " + e); |
| michael@0 | 40 | |
| michael@0 | 41 | arrs = obj.arrs; |
| michael@0 | 42 | assertEq(arrs.length, 101); |
| michael@0 | 43 | for (var i = 0; i < 100; i++) |
| michael@0 | 44 | { |
| michael@0 | 45 | assertEq(arrs[i].length, 5, "unexpected length for arrs[" + i + "]"); |
| michael@0 | 46 | assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]"); |
| michael@0 | 47 | assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]"); |
| michael@0 | 48 | assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]"); |
| michael@0 | 49 | assertEq(arrs[i][3], 3, "bad element for arrs[" + i + "][3]"); |
| michael@0 | 50 | assertEq(arrs[i][4], 4, "bad element for arrs[" + i + "][4]"); |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | a = arrs[100]; |
| michael@0 | 54 | assertEq(a[0], 0, "bad element for a[" + i + "]"); |
| michael@0 | 55 | assertEq(a[1], 1, "bad element for a[" + i + "]"); |
| michael@0 | 56 | assertEq(a[2], 2, "bad element for a[" + i + "]"); |
| michael@0 | 57 | assertEq(a[3], 3, "bad element for a[" + i + "]"); |
| michael@0 | 58 | assertEq(a.hasOwnProperty(4), false, "element addition should have thrown"); |
| michael@0 | 59 | assertEq(a[4], undefined); |
| michael@0 | 60 | assertEq(a.length, 4, "length shouldn't have been changed"); |
| michael@0 | 61 | } |
