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-rw-r--r--js/src/jit-test/tests/arrays/ion-shift-nonwritable-length.js59
1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arrays/ion-shift-nonwritable-length.js b/js/src/jit-test/tests/arrays/ion-shift-nonwritable-length.js
new file mode 100644
index 000000000..119271f20
--- /dev/null
+++ b/js/src/jit-test/tests/arrays/ion-shift-nonwritable-length.js
@@ -0,0 +1,59 @@
+function f(arr)
+{
+ assertEq(arr.shift(), 0);
+}
+
+function test(out)
+{
+ // Create an array of arrays, to be iterated over for [].shift-calling. We
+ // can't just loop on shift on a single array with non-writable length because
+ // shift throws when called on an array with non-writable length.
+ var arrs = out.arrs = [];
+ for (var i = 0; i < 100; i++)
+ arrs.push([0, 1, 2, 3]);
+
+ // Use a much-greater capacity than the eventual non-writable length.
+ 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++)
+ {
+ var arr = arrs[i];
+ f(arr);
+ }
+}
+
+var obj = {};
+var a, arrs;
+
+try
+{
+ test(obj);
+ throw new Error("didn't throw!");
+}
+catch (e)
+{
+ assertEq(e instanceof TypeError, true, "expected TypeError, got " + e);
+
+ arrs = obj.arrs;
+ assertEq(arrs.length, 101);
+ for (var i = 0; i < 100; i++)
+ {
+ assertEq(arrs[i].length, 3, "unexpected length for arrs[" + i + "]");
+ assertEq(arrs[i][0], 1, "bad element for arrs[" + i + "][0]");
+ assertEq(arrs[i][1], 2, "bad element for arrs[" + i + "][1]");
+ assertEq(arrs[i][2], 3, "bad element for arrs[" + i + "][2]");
+ assertEq(3 in arrs[i], false, "shouldn't be a third element");
+ assertEq(arrs[i][3], undefined);
+ }
+
+ a = arrs[100];
+ assertEq(a[0], 1, "bad element for a[" + i + "]");
+ assertEq(a[1], 2, "bad element for a[" + i + "]");
+ assertEq(a[2], 3, "bad element for a[" + i + "]");
+ assertEq(a.hasOwnProperty(3), false, "should have been deleted before throw");
+ assertEq(a[3], undefined);
+ assertEq(a.length, 4, "length shouldn't have been changed");
+}