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