Add optional chaining testssnapshot-20180312-3c69133-based

Change-Id: Ia87313a2756dfbc3d90128ac77cd4dc6c8c137df
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
(cherry picked from commit 7d1cf05c547a636495b2731c4fc2842a01849064)
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 19 insertions, 0 deletions

diff --git a/test/language/expressions/optional-chaining/optional-chain-prod-arguments.js b/test/language/expressions/optional-chaining/optional-chain-prod-arguments.js
new file mode 100644
index 000000000..c07fc57cb
--- /dev/null
+++ b/test/language/expressions/optional-chaining/optional-chain-prod-arguments.js
@@ -0,0 +1,19 @@
+// 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 ?. Arguments
+info: |
+  OptionalChain[Yield, Await]:
+    ?. Arguments
+features: [optional-chaining]
+---*/
+
+function fn(arg1, arg2, arg3 = 0) {
+  return arg1 + arg2 + arg3;
+}
+
+assert.sameValue(fn?.(10, 20), 30, 'regular');
+assert.sameValue(String?.(42), '42', 'built-in');
+assert.sameValue(fn ?. (...[10, 20, 40]), 70, 'spread');