2 files changed, 22 insertions, 0 deletions
diff --git a/cli/tests/testdata/run/rejection_handled.out b/cli/tests/testdata/run/rejection_handled.out
new file mode 100644
index 000000000..5c06fcd2b
--- /dev/null
+++ b/cli/tests/testdata/run/rejection_handled.out
@@ -0,0 +1,5 @@
+[WILDCARD]
+unhandledrejection 1 Promise { <rejected> 1 }
+Added catch handler to the promise
+rejectionhandled 1 Promise { <rejected> 1 }
+Success
diff --git a/cli/tests/testdata/run/rejection_handled.ts b/cli/tests/testdata/run/rejection_handled.ts
new file mode 100644
index 000000000..f058ff966
--- /dev/null
+++ b/cli/tests/testdata/run/rejection_handled.ts
@@ -0,0 +1,17 @@
+window.addEventListener("unhandledrejection", (event) => {
+  console.log("unhandledrejection", event.reason, event.promise);
+  event.preventDefault();
+});
+
+window.addEventListener("rejectionhandled", (event) => {
+  console.log("rejectionhandled", event.reason, event.promise);
+});
+
+const a = Promise.reject(1);
+setTimeout(async () => {
+  a.catch(() => console.log("Added catch handler to the promise"));
+}, 10);
+
+setTimeout(() => {
+  console.log("Success");
+}, 50);