1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/non262/Promise/promise-rejection-tracking.js b/js/src/tests/non262/Promise/promise-rejection-tracking.js
new file mode 100644
index 0000000000..a596fa6a99
--- /dev/null
+++ b/js/src/tests/non262/Promise/promise-rejection-tracking.js
@@ -0,0 +1,31 @@
+// |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);
+
+// Unhandled rejections are tracked.
+let reject;
+let p = new Promise((res_, rej_) => (reject = rej_));
+assertEq(rejections.has(p), false);
+reject('reason');
+assertEq(rejections.get(p), UNHANDLED);
+// Later handling updates the tracking.
+p.then(_=>_, _=>_);
+assertEq(rejections.get(p), HANDLED);
+
+rejections.clear();
+
+// Handled rejections aren't tracked at all.
+p = new Promise((res_, rej_) => (reject = rej_));
+assertEq(rejections.has(p), false);
+p.then(_=>_, _=>_);
+reject('reason');
+assertEq(rejections.has(p), false);
+
+this.reportCompare && reportCompare(true,true);