1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/flatMap/close-iterator-when-inner-complete-throws.js b/js/src/tests/non262/AsyncIterator/prototype/flatMap/close-iterator-when-inner-complete-throws.js
new file mode 100644
index 0000000000..bca8f7c316
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+++ b/js/src/tests/non262/AsyncIterator/prototype/flatMap/close-iterator-when-inner-complete-throws.js
@@ -0,0 +1,55 @@
+// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
+
+//
+//
+/*---
+esid: pending
+description: %AsyncIterator.prototype%.flatMap closes the iterator when innerComplete throws.
+info: >
+  Iterator Helpers proposal 2.1.6.7
+  1. Repeat,
+    ...
+    k. Repeat, while innerAlive is true,
+      ...
+      v. Let innerComplete be IteratorComplete(innerNext).
+      vi. IfAbruptCloseAsyncIterator(innerComplete, iterated).
+features: [iterator-helpers]
+---*/
+
+class TestIterator extends AsyncIterator {
+  async next() {
+    return {done: false, value: 0};
+  }
+
+  closed = false;
+  async return() {
+    this.closed = true;
+    return {done: true};
+  }
+}
+
+class TestError extends Error {}
+class InnerIterator extends AsyncIterator {
+  async next() {
+    return {
+      get done() {
+        throw new TestError();
+      }
+    };
+  }
+}
+
+const iter = new TestIterator();
+const mapped = iter.flatMap(x => new InnerIterator());
+
+assertEq(iter.closed, false);
+mapped.next().then(
+  _ => assertEq(true, false, 'Expected reject.'),
+  err => {
+    assertEq(err instanceof TestError, true);
+    assertEq(iter.closed, true);
+  }
+);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);