1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/non262/Promise/enqueue-promise-reactions.js b/js/src/tests/non262/Promise/enqueue-promise-reactions.js
new file mode 100644
index 0000000000..e7a6c2426e
--- /dev/null
+++ b/js/src/tests/non262/Promise/enqueue-promise-reactions.js
@@ -0,0 +1,38 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs getSelfHostedValue and drainJobQueue
+
+function onResolved(val) {
+    result = 'resolved with ' + val;
+}
+
+function onRejected(val) {
+    result = 'rejected with ' + val;
+}
+
+// Replacing `Promise#then` shouldn't affect addPromiseReactions.
+Promise.prototype.then = 1;
+
+// Replacing Promise@@species shouldn't affect addPromiseReactions.
+Object.defineProperty(Promise, Symbol.species, { get: function(){} });
+
+// Replacing `Promise` shouldn't affect addPromiseReactions.
+let PromiseCtor = Promise;
+Promise = {};
+
+let result;
+let res;
+let rej;
+let p = new PromiseCtor(function(res_, rej_) { res = res_; rej = rej_; });
+
+addPromiseReactions(p, onResolved, onRejected);
+res('foo');
+drainJobQueue();
+assertEq(result, 'resolved with foo')
+
+p = new PromiseCtor(function(res_, rej_) { res = res_; rej = rej_; });
+
+addPromiseReactions(p, onResolved, onRejected);
+rej('bar');
+drainJobQueue();
+assertEq(result, 'rejected with bar');
+
+this.reportCompare && reportCompare(true,true);