| load(libdir + "asserts.js"); |
| |
| function f(arr) |
| { |
| assertEq(arr.pop(), undefined); // if it doesn't throw |
| } |
| |
| var N = 100; |
| |
| function basic(out) |
| { |
| // Create an array of arrays, to be iterated over for [].pop-calling. We |
| // can't just loop on pop on a single array with non-writable length because |
| // pop throws when called on an array with non-writable length. |
| var arrs = out.arrs = []; |
| for (var i = 0; i < N; i++) |
| { |
| var arr = [0, 1, 2, 3, 4]; |
| arr.length = 6; |
| arrs.push(arr); |
| } |
| |
| var a = [0, 1, 2, 3, 4]; |
| Object.defineProperty(a, "length", { writable: false, value: 6 }); |
| |
| arrs.push(a); |
| |
| for (var i = 0, sz = arrs.length; i < sz; i++) |
| f(arrs[i]); |
| } |
| |
| var obj = {}; |
| var arrs, a; |
| |
| assertThrowsInstanceOf(function() { basic(obj); }, TypeError); |
| |
| var arrs = obj.arrs; |
| assertEq(arrs.length, N + 1); |
| for (var i = 0; i < N; i++) |
| { |
| assertEq(arrs[i].length, 5, "unexpected length for arrs[" + i + "]"); |
| assertEq(arrs[i].hasOwnProperty(5), false, |
| "element not deleted for arrs[" + i + "]"); |
| } |
| |
| var a = arrs[N]; |
| assertEq(a.hasOwnProperty(5), false); |
| assertEq(a[5], undefined); |
| assertEq(a.length, 6); |