1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/prototype/toString/proxy-function-async.js b/js/src/tests/test262/built-ins/Object/prototype/toString/proxy-function-async.js
new file mode 100644
index 0000000000..094b7c0e70
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/prototype/toString/proxy-function-async.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2019 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.prototype.tostring
+description: Proxy of async function is treated as a function.
+info: |
+  ProxyCreate ( target, handler )
+
+  [...]
+  7. If IsCallable(target) is true, then
+    a. Set P.[[Call]] as specified in 9.5.12.
+
+  Object.prototype.toString ( )
+
+  [...]
+  7. Else if O has a [[Call]] internal method, let builtinTag be "Function".
+features: [async-functions, Proxy, Symbol.toStringTag]
+---*/
+
+var asyncProxy = new Proxy(async function() {}, {});
+var asyncProxyProxy = new Proxy(asyncProxy, {});
+
+assert.sameValue(
+  Object.prototype.toString.call(asyncProxy),
+  '[object AsyncFunction]',
+  'async function proxy'
+);
+assert.sameValue(
+  Object.prototype.toString.call(asyncProxyProxy),
+  '[object AsyncFunction]',
+  'proxy for async function proxy'
+);
+
+reportCompare(0, 0);