1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/AsyncGeneratorFunction/instance-prototype.js b/js/src/tests/test262/built-ins/AsyncGeneratorFunction/instance-prototype.js
new file mode 100644
index 0000000000..85eab9ae00
--- /dev/null
+++ b/js/src/tests/test262/built-ins/AsyncGeneratorFunction/instance-prototype.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asyncgeneratorfunction
+description: Definition of instance `prototype` property
+info: |
+    AsyncGeneratorFunction ( p1, p2, … , pn, body )
+    ...
+    3. Return CreateDynamicFunction(C, NewTarget, "async generator", args).
+
+    Runtime Semantics: CreateDynamicFunction
+    ...
+    37. Else if kind is "async generator", then
+        a. Let prototype be ObjectCreate(%AsyncGeneratorPrototype%).
+        b. Perform DefinePropertyOrThrow(F, "prototype",
+           PropertyDescriptor{[[Value]]: prototype, [[Writable]]: true,
+           [[Enumerable]]: false, [[Configurable]]: false}).
+    ...
+includes: [propertyHelper.js]
+features: [async-iteration]
+---*/
+
+var AsyncGeneratorFunction = Object.getPrototypeOf(async function* () {}).constructor;
+
+var instance = AsyncGeneratorFunction();
+
+assert.sameValue(typeof instance.prototype, 'object');
+assert.sameValue(
+  Object.getPrototypeOf(instance.prototype),
+  Object.getPrototypeOf(instance).prototype
+);
+
+verifyProperty(instance, "prototype", {
+  enumerable: false,
+  writable: true,
+  configurable: false,
+});
+
+reportCompare(0, 0);