fix(op_crates/web): handler order when reassign (#8264)

1 files changed, 18 insertions, 0 deletions

diff --git a/op_crates/web/abort_controller_test.js b/op_crates/web/abort_controller_test.js
index 4d3741986..a65bc69ff 100644
--- a/op_crates/web/abort_controller_test.js
+++ b/op_crates/web/abort_controller_test.js
@@ -95,6 +95,23 @@ function abortSignalEventOrder() {
   assertEquals(arr[1], 2);
   assertEquals(arr[2], 3);
 }
+
+function abortSignalEventOrderComplex() {
+  const arr = [];
+  const controller = new AbortController();
+  const { signal } = controller;
+  signal.addEventListener("abort", () => arr.push(1));
+  signal.onabort = () => {
+    throw new Error();
+  };
+  signal.addEventListener("abort", () => arr.push(3));
+  signal.onabort = () => arr.push(2);
+  controller.abort();
+  assertEquals(arr[0], 1);
+  assertEquals(arr[1], 2);
+  assertEquals(arr[2], 3);
+}
+
 function abortSignalHandlerLocation() {
   const controller = new AbortController();
   const { signal } = controller;
@@ -109,6 +126,7 @@ function main() {
   controllerHasProperToString();
   abortSignalIllegalConstructor();
   abortSignalEventOrder();
+  abortSignalEventOrderComplex();
   abortSignalHandlerLocation();
 }