1 files changed, 14 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Set-iterator-order.js b/js/src/jit-test/tests/collections/Set-iterator-order.js
new file mode 100644
index 000000000..3ac842507
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Set-iterator-order.js
@@ -0,0 +1,14 @@
+// Set iterators produces entries in the order they were inserted.
+
+var set = new Set();
+var i;
+for (i = 7; i !== 1; i = i * 7 % 1117)
+    set.add(i);
+assertEq(set.size, 557);
+
+i = 7;
+for (var v of set) {
+    assertEq(v, i);
+    i = i * 7 % 1117;
+}
+assertEq(i, 1);