1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/promise/settle-now-already-resolved.js b/js/src/jit-test/tests/promise/settle-now-already-resolved.js
new file mode 100644
index 0000000000..44186f868f
--- /dev/null
+++ b/js/src/jit-test/tests/promise/settle-now-already-resolved.js
@@ -0,0 +1,28 @@
+// |jit-test| error:Unhandled rejection
+
+load(libdir + "asserts.js");
+
+// Calling settlePromiseNow on already-resolved promise should throw, and
+// unhandled rejection tracking should work.
+
+assertThrowsInstanceOf(() => {
+  var promise = new Promise(resolve => {
+    resolve(10);
+  });
+  settlePromiseNow(promise);
+}, Error);
+
+
+assertThrowsInstanceOf(() => {
+  var promise = new Promise((_, reject) => {
+    reject(10);
+  });
+  settlePromiseNow(promise);
+}, Error);
+
+assertThrowsInstanceOf(() => {
+  var promise = new Promise(() => {
+    throw 10;
+  });
+  settlePromiseNow(promise);
+}, Error);