1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/set-contract-expand.js b/js/src/tests/test262/language/statements/for-of/set-contract-expand.js
new file mode 100644
index 0000000000..4a397815e9
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-of/set-contract-expand.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Set entry removal and re-insertion during traversal using for..of
+info: |
+    Entries removed from a Set instance during traversal should be visited if
+    they are re-inserted prior to iterator exhaustion.
+es6id: 13.6.4
+features: [Set]
+---*/
+
+var set = new Set();
+var iterationCount = 0;
+
+var first = 0;
+var second = 1;
+
+set.add(0);
+set.add(1);
+
+for (var x of set) {
+  assert.sameValue(x, first);
+
+  first = second;
+  second = null;
+
+  if (first !== null) {
+    set.delete(1);
+    set.add(1);
+  }
+
+  iterationCount += 1;
+}
+
+assert.sameValue(iterationCount, 2);
+
+reportCompare(0, 0);