Async tests

Author: ShortDevelopment

test/es12/optional-async.js

@@ -0,0 +1,22 @@
+//-------------------------------------------------------------------------------------------------------
+// Copyright (C) Microsoft. All rights reserved.
+// Copyright (c) ChakraCore Project Contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
+
+// @ts-check
+
+const simpleObj = { null: null, undefined: undefined, something: 42 };
+Object.freeze(simpleObj);
+
+// Short-circuiting ignores indexer expression and method args
+(async () => {
+    simpleObj.nothing?.[await Promise.reject()];
+    simpleObj.null?.[await Promise.reject()];
+    simpleObj.undefined?.[await Promise.reject()];
+})().then(
+    () => {
+        console.log("pass");
+    },
+    (x) => console.log(x)
+);

test/es12/optional-chaining.js

@@ -59,11 +59,6 @@ const tests = [
             assert.isUndefined(simpleObj.undefined?.something(i++));
 
             assert.strictEqual(0, i, "Indexer may never be evaluated");
-
-            // ToDo: How can I run async tests?
-            // simpleObj.nothing?.[await Promise.reject()];
-            // simpleObj.null?.[await Promise.reject()];
-            // simpleObj.undefined?.[await Promise.reject()];
         }
     },
     {

test/es12/rlexe.xml

@@ -13,5 +13,9 @@
       <files>optional-calls.js</files>
       <compile-flags>-args summary -endargs</compile-flags>
     </default>
+    <default>
+      <files>optional-async.js</files>
+      <compile-flags>-args summary -endargs</compile-flags>
+    </default>
   </test>
 </regress-exe>