1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/unshift-with-enumeration.js b/js/src/tests/non262/Array/unshift-with-enumeration.js
new file mode 100644
index 0000000000..fbf451b8cc
--- /dev/null
+++ b/js/src/tests/non262/Array/unshift-with-enumeration.js
@@ -0,0 +1,18 @@
+function f(array, method, args) {
+  var called = false;
+  var keys = [];
+  for (var key in array) {
+    keys.push(key);
+    if (!called) {
+      called = true;
+      Reflect.apply(method, array, args);
+    }
+  }
+  return keys;
+}
+
+assertEqArray(f([1, /* hole */, 3], Array.prototype.unshift, [0]), ["0"]);
+assertEqArray(f([1, /* hole */, 3], Array.prototype.splice, [0, 0, 0]), ["0"]);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);