1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-returns-done-generator-finishes.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-returns-done-generator-finishes.js
new file mode 100644
index 0000000000..d7e2be8f5d
--- /dev/null
+++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-returns-done-generator-finishes.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
+
+class TestIterator extends AsyncIterator {
+  async next() {
+    return {done: true, value: 'value'};
+  }
+}
+
+async function* gen(x) { yield x; }
+
+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(gen),
+];
+
+(async () => {
+  for (const method of methods) {
+    const iterator = method(new TestIterator());
+    const {done, value} = await iterator.next();
+    assertEq(done, true);
+    assertEq(value, undefined);
+  }
+})();
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);