1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/iterator-close-non-throw-get-method-is-null.js b/js/src/tests/test262/language/statements/for-await-of/iterator-close-non-throw-get-method-is-null.js
new file mode 100644
index 0000000000..61a35bacfc
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-await-of/iterator-close-non-throw-get-method-is-null.js
@@ -0,0 +1,52 @@
+// |reftest| async
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asynciteratorclose
+description: >
+  If iterator's "return" method is `null`,
+  received non-throw completion is forwarded to the runtime.
+info: |
+  AsyncIteratorClose ( iteratorRecord, completion )
+
+  [...]
+  4. Let innerResult be GetMethod(iterator, "return").
+  5. If innerResult.[[Type]] is normal,
+    a. Let return be innerResult.[[Value]].
+    b. If return is undefined, return Completion(completion).
+
+  GetMethod ( V, P )
+
+  [...]
+  2. Let func be ? GetV(V, P).
+  3. If func is either undefined or null, return undefined.
+features: [Symbol.asyncIterator, async-iteration]
+flags: [async]
+includes: [asyncHelpers.js]
+---*/
+
+var iterationCount = 0;
+var returnGets = 0;
+
+var iterable = {};
+iterable[Symbol.asyncIterator] = function() {
+  return {
+    next: function() {
+      return {value: 1, done: false};
+    },
+    get return() {
+      returnGets += 1;
+      return null;
+    },
+  };
+};
+
+asyncTest(async function() {
+  for await (var _ of iterable) {
+    iterationCount += 1;
+    break;
+  }
+
+  assert.sameValue(iterationCount, 1);
+  assert.sameValue(returnGets, 1);
+});