1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/map/call-next-on-iterator-while-iterating.js b/js/src/tests/non262/Iterator/prototype/map/call-next-on-iterator-while-iterating.js
new file mode 100644
index 0000000000..a5a10120a0
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/map/call-next-on-iterator-while-iterating.js
@@ -0,0 +1,24 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+/*---
+esid: pending
+description: Call next on an iterator that is being iterated over.
+info:
+features: [iterator-helpers]
+---*/
+
+const iterator = [1, 2, 3].values()
+const items = [];
+
+for (const item of iterator.map(x => x ** 2)) {
+  const nextItem = iterator.next();
+  items.push(item, nextItem.value);
+}
+
+assertEq(items[0], 1);
+assertEq(items[1], 2);
+assertEq(items[2], 9);
+assertEq(items[3], undefined);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);