1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/from/wrap-return-closes-iterator.js b/js/src/tests/non262/Iterator/from/wrap-return-closes-iterator.js
new file mode 100644
index 0000000000..22518871f3
--- /dev/null
+++ b/js/src/tests/non262/Iterator/from/wrap-return-closes-iterator.js
@@ -0,0 +1,33 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator')) -- Iterator is not enabled unconditionally
+class Iter {
+  next() {
+    if (this.closed)
+      return { done: true, value: undefined };
+    return { done: false, value: 0 };
+  }
+
+  return(value) {
+    this.closed = true;
+    return { done: true, value };
+  }
+}
+
+const iter = new Iter();
+const wrap = Iterator.from(iter);
+assertEq(iter.closed, undefined);
+
+let result = wrap.next();
+assertEq(result.done, false);
+assertEq(result.value, 0);
+
+result = wrap.return(1);
+assertEq(result.done, true);
+assertEq(result.value, 1);
+
+assertEq(iter.closed, true);
+result = wrap.next();
+assertEq(result.done, true);
+assertEq(result.value, undefined);
+
+if (typeof reportCompare === 'function')
+  reportCompare(0, 0);