Add optional chaining tests

Change-Id: Ia87313a2756dfbc3d90128ac77cd4dc6c8c137df
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 23 insertions, 0 deletions

diff --git a/test/language/expressions/optional-chaining/static-semantics-simple-assignment.js b/test/language/expressions/optional-chaining/static-semantics-simple-assignment.js
new file mode 100644
index 000000000..7eb974455
--- /dev/null
+++ b/test/language/expressions/optional-chaining/static-semantics-simple-assignment.js
@@ -0,0 +1,23 @@
+
+// Copyright 2019 Google, Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: prod-OptionalExpression
+description: >
+  an optional expression cannot be target of assignment
+info: |
+  Static Semantics: IsValidSimpleAssignmentTarget
+    LeftHandSideExpression:
+      OptionalExpression
+    Return false.
+features: [optional-chaining]
+negative:
+  type: SyntaxError
+  phase: parse
+---*/
+
+$DONOTEVALUATE();
+
+const obj = {};
+
+obj?.a = 33;