1 files changed, 38 insertions, 0 deletions
diff --git a/test/language/expressions/optional-chaining/optional-chain-prod-identifiername.js b/test/language/expressions/optional-chaining/optional-chain-prod-identifiername.js
new file mode 100644
index 000000000..768af6beb
--- /dev/null
+++ b/test/language/expressions/optional-chaining/optional-chain-prod-identifiername.js
@@ -0,0 +1,38 @@
+// Copyright 2020 Salesforce.com, Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: prod-OptionalExpression
+description: >
+  Productions for ?. IdentifierName
+info: |
+  OptionalChain[Yield, Await]:
+    ?. IdentifierName
+features: [optional-chaining]
+---*/
+
+const arr = [10, 11];
+const obj = {
+  a: 'hello'
+};
+
+assert.sameValue(obj?.a, 'hello');
+assert.sameValue(obj?.\u0061, 'hello');
+assert.sameValue(obj?.\u{0061}, 'hello');
+
+assert.sameValue(obj?.\u0062, undefined);
+assert.sameValue(obj?.\u{0062}, undefined);
+
+assert.sameValue(arr ?. length, 2);
+assert.sameValue(arr ?. l\u0065ngth, 2);
+assert.sameValue(arr ?. l\u{0065}ngth, 2);
+
+assert.sameValue(obj?.$, undefined);
+
+obj.$ = 42;
+assert.sameValue(obj?.$, 42);
+
+assert.sameValue(obj?._, undefined);
+
+obj._ = 39;
+assert.sameValue(obj?._, 39);