1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/non262/Promise/promise-rejection-tracking-optimized.js b/js/src/tests/non262/Promise/promise-rejection-tracking-optimized.js
new file mode 100644
index 0000000000..c085b9dba8
--- /dev/null
+++ b/js/src/tests/non262/Promise/promise-rejection-tracking-optimized.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs setPromiseRejectionTrackerCallback
+
+const UNHANDLED = 0;
+const HANDLED   = 1;
+
+let rejections = new Map();
+function rejectionTracker(promise, state) {
+  rejections.set(promise, state);
+}
+setPromiseRejectionTrackerCallback(rejectionTracker);
+
+// If the return value of then is not used, the promise object is optimized
+// away, but if a rejection happens, the rejection should be notified.
+Promise.resolve().then(() => { throw 1; });
+drainJobQueue();
+
+assertEq(rejections.size, 1);
+
+let [[promise, state]] = rejections;
+assertEq(state, UNHANDLED);
+
+let exc;
+promise.catch(x => { exc = x; });
+drainJobQueue();
+
+// we handled it after all
+assertEq(rejections.get(promise), HANDLED);
+
+// the right exception was reported
+assertEq(exc, 1);
+
+if (this.reportCompare) {
+  reportCompare(true,true);
+}