1 files changed, 82 insertions, 0 deletions
diff --git a/test/built-ins/AsyncGeneratorPrototype/next/request-queue-promise-resolve-order.js b/test/built-ins/AsyncGeneratorPrototype/next/request-queue-promise-resolve-order.js
new file mode 100644
index 000000000..f459cd5eb
--- /dev/null
+++ b/test/built-ins/AsyncGeneratorPrototype/next/request-queue-promise-resolve-order.js
@@ -0,0 +1,82 @@
+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-asyncgenerator-prototype-next
+description: next() requests from iterator processed in order, then
+info: >
+  AsyncGenerator.prototype.next ( value )
+  1. Let generator be the this value.
+  2. Let completion be NormalCompletion(value).
+  3. Return ! AsyncGeneratorEnqueue(generator, completion).
+
+  AsyncGeneratorEnqueue ( generator, completion )
+  ...
+  4. Let queue be generator.[[AsyncGeneratorQueue]].
+  5. Let request be AsyncGeneratorRequest{[[Completion]]: completion,
+     [[Capability]]: promiseCapability}.
+  6. Append request to the end of queue.
+  ...
+
+  AsyncGeneratorResolve ( generator, value, done )
+  ...
+  2. Let queue be generator.[[AsyncGeneratorQueue]].
+  3. Assert: queue is not an empty List.
+  4. Remove the first element from queue and let next be the value of that element.
+  ...
+
+flags: [async]
+features: [async-iteration]
+---*/
+
+var yieldorder = 0;
+var resolveLatePromise;
+
+function resolveLater() {
+  return new Promise(resolve => {
+    resolveLatePromise = resolve;
+  });
+}
+
+async function* g() {
+  yield resolveLater();
+  yield ++yieldorder;
+}
+
+var iter = g();
+
+var item1 = iter.next();
+var item2 = iter.next();
+var item3 = iter.next();
+
+var resolvedorder = 0;
+
+Promise.all([
+
+  item3.then(function(result) {
+    resolvedorder++;
+    assert.sameValue(resolvedorder, 3);
+    assert.sameValue(result.value, undefined);
+    assert.sameValue(result.done, true);
+  }),
+
+  item2.then(function(result) {
+    resolvedorder++;
+    assert.sameValue(resolvedorder, 2);
+    assert.sameValue(result.value, 2);
+    assert.sameValue(result.done, false);
+  }),
+
+  item1.then(function(result) {
+    resolvedorder++;
+    assert.sameValue(resolvedorder, 1);
+    assert.sameValue(result.value, 1);
+    assert.sameValue(result.done, false);
+  })
+
+]).then(function() { $DONE(); }, $DONE);
+
+// At this point:
+//   yieldorder == 0
+//   item1 is an unresolved promise
+resolveLatePromise(++yieldorder);