1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/optional-chaining/optional-chain-async-optional-chain-square-brackets.js b/js/src/tests/test262/language/optional-chaining/optional-chain-async-optional-chain-square-brackets.js
new file mode 100644
index 0000000000..b47b2aeeed
--- /dev/null
+++ b/js/src/tests/test262/language/optional-chaining/optional-chain-async-optional-chain-square-brackets.js
@@ -0,0 +1,29 @@
+// |reftest| async
+// Copyright 2019 Google, Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: prod-OptionalExpression
+description: >
+  optional chain expansions in an async context
+info: |
+  Left-Hand-Side Expressions
+    OptionalExpression
+      MemberExpression [PrimaryExpression Identifier] OptionalChain
+        OptionalChain OptionalChain ?.[Expression]
+features: [optional-chaining]
+flags: [async]
+---*/
+
+async function checkAssertions() {
+  assert.sameValue(await {a: [11]}?.a[0], 11);
+  const b = {c: [22, 33]};
+  assert.sameValue(b?.c[await Promise.resolve(1)], 33);
+  function e(val) {
+    return val;
+  }
+  assert.sameValue({d: e}?.d(await Promise.resolve([44, 55]))[1], 55);
+  assert.sameValue(undefined?.arr[
+    await Promise.reject(new Error('unreachable'))
+  ], undefined);
+}
+checkAssertions().then($DONE, $DONE);