async-iteration: AsyncGeneratorPrototype tests (#1451)

1 files changed, 46 insertions, 0 deletions

diff --git a/test/built-ins/AsyncGeneratorPrototype/next/iterator-result-prototype.js b/test/built-ins/AsyncGeneratorPrototype/next/iterator-result-prototype.js
new file mode 100644
index 000000000..47b3ddd44
--- /dev/null
+++ b/test/built-ins/AsyncGeneratorPrototype/next/iterator-result-prototype.js
@@ -0,0 +1,46 @@
+// 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" returns a promise for an IteratorResult object
+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 )
+  1. Assert: generator is an AsyncGenerator instance.
+  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.
+  5. Let promiseCapability be next.[[Capability]].
+  6. Let iteratorResult be ! CreateIterResultObject(value, done).
+  7. Perform ! Call(promiseCapability.[[Resolve]], undefined, « iteratorResult »).
+  ...
+
+flags: [async]
+features: [async-iteration]
+---*/
+
+async function* g() {}
+
+g().next().then(function (result) {
+  assert(
+    Object.hasOwnProperty.call(result, 'value'), 'Has "own" property `value`'
+  );
+  assert(
+    Object.hasOwnProperty.call(result, 'done'), 'Has "own" property `done`'
+  );
+  assert.sameValue(Object.getPrototypeOf(result), Object.prototype);
+}).then($DONE, $DONE)