1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/shift_for_in.js b/js/src/tests/non262/Array/shift_for_in.js
new file mode 100644
index 0000000000..1bbf2d9c2d
--- /dev/null
+++ b/js/src/tests/non262/Array/shift_for_in.js
@@ -0,0 +1,13 @@
+var BUGNUMBER = 1247701;
+var summary = 'Array.prototype.shift on a dense array with holes should update for-in enumeration properties.';
+
+print(BUGNUMBER + ": " + summary);
+
+var x = ["a", , "b", , "c", "d" , "e", "f", "g"];
+for (var p in x) {
+  assertEq(p in x, true);
+  x.shift();
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);