1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Promise/race/resolve-element-function-extensible.js b/js/src/tests/test262/built-ins/Promise/race/resolve-element-function-extensible.js
new file mode 100644
index 0000000000..f50dfbfc64
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Promise/race/resolve-element-function-extensible.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-promise.race-resolve-element-functions
+description: The [[Extensible]] slot of Promise.race Resolve Element functions
+info: |
+  17 ECMAScript Standard Built-in Objects:
+    Unless specified otherwise, the [[Extensible]] internal slot
+    of a built-in object initially has the value true.
+---*/
+
+let resolveElementFunction;
+let thenable = {
+  then(fulfill) {
+    resolveElementFunction = fulfill;
+  }
+};
+
+function NotPromise(executor) {
+  executor(() => {}, () => {});
+}
+NotPromise.resolve = function(v) {
+  return v;
+};
+Promise.race.call(NotPromise, [thenable]);
+
+assert(Object.isExtensible(resolveElementFunction));
+
+reportCompare(0, 0);