1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/optional-chaining/optional-chain.js b/js/src/tests/test262/language/expressions/optional-chaining/optional-chain.js
new file mode 100644
index 0000000000..b8dd183092
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/optional-chaining/optional-chain.js
@@ -0,0 +1,52 @@
+// Copyright 2019 Google, Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: prod-OptionalExpression
+description: >
+  various optional chain expansions
+info: |
+  OptionalChain[Yield, Await]:
+    ?.[Expression]
+    ?.IdentifierName
+    ?.Arguments
+    ?.TemplateLiteral
+    OptionalChain [Expression]
+    OptionalChain .IdentifierName
+    OptionalChain Arguments[?Yield, ?Await]
+    OptionalChain TemplateLiteral
+features: [optional-chaining]
+---*/
+
+const arr = [10, 11];
+const obj = {
+  a: 'hello',
+  b: {val: 13},
+  c(arg1) {
+    return arg1 * 2;
+  },
+  arr: [11, 12]
+};
+const i = 0;
+
+// OptionalChain: ?.[Expression]
+assert.sameValue(11, arr?.[i + 1]);
+
+// OptionalChain: ?.IdentifierName
+assert.sameValue('hello', obj?.a);
+
+// OptionalChain: ?.Arguments
+const fn = (arg1, arg2) => {
+  return arg1 + arg2;
+}
+assert.sameValue(30, fn?.(10, 20));
+
+// OptionalChain: OptionalChain [Expression]
+assert.sameValue(12, obj?.arr[i + 1]);
+
+// OptionalChain: OptionalChain .IdentifierName
+assert.sameValue(13, obj?.b.val);
+
+// OptionalChain: OptionalChain Arguments
+assert.sameValue(20, obj?.c(10));
+
+reportCompare(0, 0);