| load(libdir + "asserts.js"); |
| |
| function f(arr) |
| { |
| assertEq(arr.splice(1, 2, 9, 8, 7, 6).length, 2); // if it doesn't throw :-) |
| } |
| |
| var N = 100; |
| |
| function test(out) |
| { |
| // Create an array of arrays, to be iterated over for [].splice-calling. |
| var arrs = out.arrs = []; |
| for (var i = 0; i < N; i++) |
| arrs.push([0, 1, 2, 3]); |
| |
| // Use a much-greater capacity than the eventual non-writable length, just for |
| // variability. |
| var a = [0, 1, 2, 3, 4, 5, 6, 7]; |
| Object.defineProperty(a, "length", { writable: false, value: 4 }); |
| |
| arrs.push(a); |
| |
| for (var i = 0, sz = arrs.length; i < sz; i++) |
| f(arrs[i]); |
| } |
| |
| var obj = {}; |
| assertThrowsInstanceOf(function() { test(obj); }, TypeError); |
| |
| var arrs = obj.arrs; |
| assertEq(arrs.length, N + 1); |
| for (var i = 0; i < N; i++) |
| { |
| assertEq(arrs[i].length, 6, "unexpected length for arrs[" + i + "]"); |
| assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]"); |
| assertEq(arrs[i][1], 9, "bad element for arrs[" + i + "][1]"); |
| assertEq(arrs[i][2], 8, "bad element for arrs[" + i + "][2]"); |
| assertEq(arrs[i][3], 7, "bad element for arrs[" + i + "][3]"); |
| assertEq(arrs[i][4], 6, "bad element for arrs[" + i + "][4]"); |
| assertEq(arrs[i][5], 3, "bad element for arrs[" + i + "][5]"); |
| } |
| |
| var a = arrs[N]; |
| assertEq(a[0], 0, "bad element for a[0]"); |
| assertEq(a[1], 1, "bad element for a[1]"); |
| assertEq(a[2], 2, "bad element for a[2]"); |
| assertEq(a[3], 3, "bad element for a[3]"); |
| assertEq(a.hasOwnProperty(4), false, "shouldn't have added any elements"); |
| assertEq(a[4], undefined); |
| assertEq(a.hasOwnProperty(5), false, "shouldn't have added any elements"); |
| assertEq(a[5], undefined); |
| assertEq(a.length, 4, "length shouldn't have been changed"); |