1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/AsyncFunction/instance-length.js b/js/src/tests/test262/built-ins/AsyncFunction/instance-length.js
new file mode 100644
index 0000000000..6a139180d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/AsyncFunction/instance-length.js
@@ -0,0 +1,24 @@
+// Copyright 2016 Microsoft, Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Brian Terlson <brian.terlson@microsoft.com>
+esid: sec-async-function-instances-length
+description: >
+  Async functions have a length property that is the number of expected
+  arguments.
+includes: [propertyHelper.js]
+---*/
+
+async function l0() {}
+async function l1(a) {}
+async function l2(a, b) {}
+assert.sameValue(l0.length, 0);
+assert.sameValue(l1.length, 1);
+assert.sameValue(l2.length, 2)
+
+verifyNotWritable(l0, 'length');
+verifyNotEnumerable(l0, 'length');
+verifyConfigurable(l0, 'length');
+
+reportCompare(0, 0);