1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/lazy-methods-return-new-iterator-result.js b/js/src/tests/non262/Iterator/prototype/lazy-methods-return-new-iterator-result.js
new file mode 100644
index 0000000000..407782fae5
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/lazy-methods-return-new-iterator-result.js
@@ -0,0 +1,39 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+//
+//
+/*---
+esid: pending
+description: Lazy Iterator Helper methods return new iterator result objects.
+info: >
+  Iterator Helpers proposal 2.1.5
+features: [iterator-helpers]
+---*/
+
+const iterResult = {done: false, value: 1, testProperty: 'test'};
+class TestIterator extends Iterator {
+  next() {
+    return iterResult;
+  }
+}
+
+const methods = [
+  iter => iter.map(x => x),
+  iter => iter.filter(x => true),
+  iter => iter.take(1),
+  iter => iter.drop(0),
+  iter => iter.asIndexedPairs(),
+  iter => iter.flatMap(x => [x]),
+];
+
+// Call `return` before stepping the iterator:
+for (const method of methods) {
+  const iter = new TestIterator();
+  const iterHelper = method(iter);
+  const result = iterHelper.next();
+  assertEq(result == iterResult, false);
+  assertEq(result.testProperty, undefined);
+}
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);