1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/AsyncFromSyncIteratorPrototype/next/iterator-result-prototype.js b/js/src/tests/test262/built-ins/AsyncFromSyncIteratorPrototype/next/iterator-result-prototype.js
new file mode 100644
index 0000000000..d3f638e48e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/AsyncFromSyncIteratorPrototype/next/iterator-result-prototype.js
@@ -0,0 +1,43 @@
+// |reftest| async
+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-%asyncfromsynciteratorprototype%.next
+description: next() returns a promise for an IteratorResult object
+info: |
+  %AsyncFromSyncIteratorPrototype%.next ( value )
+  ...
+  2. Let promiseCapability be ! NewPromiseCapability(%Promise%).
+  ...
+  5. Let nextResult be IteratorNext(syncIteratorRecord, value).
+  6. IfAbruptRejectPromise(nextResult, promiseCapability).
+  7. Let nextDone be IteratorComplete(nextResult).
+  8. If AbruptRejectPromise(nextDone, promiseCapability).
+  9. Let nextValue be IteratorValue(nextResult).
+  10. IfAbruptRejectPromise(nextValue, promiseCapability).
+  ...
+  14. Let steps be the algorithm steps defined in Async-from-Sync Iterator Value Unwrap Functions.
+
+  Async-from-Sync Iterator Value Unwrap Functions
+  1. Return ! CreateIterResultObject(value, F.[[Done]]).
+
+flags: [async]
+features: [async-iteration]
+---*/
+
+function* g() {}
+
+async function* asyncg() {
+  yield* g();
+}
+
+asyncg().next().then(function (result) {
+  assert(
+    Object.prototype.hasOwnProperty.call(result, 'value'), 'Has "own" property `value`'
+  );
+  assert(
+    Object.prototype.hasOwnProperty.call(result, 'done'), 'Has "own" property `done`'
+  );
+  assert.sameValue(Object.getPrototypeOf(result), Object.prototype);
+}).then($DONE, $DONE);