1 files changed, 26 insertions, 0 deletions
diff --git a/tests/testdata/run/worker_message_before_close.js b/tests/testdata/run/worker_message_before_close.js
new file mode 100644
index 000000000..569388b9b
--- /dev/null
+++ b/tests/testdata/run/worker_message_before_close.js
@@ -0,0 +1,26 @@
+const messagesReceived = new Set();
+
+for (let i = 0; i < 4; i++) {
+  const worker = new Worker(
+    import.meta.resolve("../workers/message_before_close.js"),
+    { type: "module", name: String(i) },
+  );
+
+  worker.addEventListener("message", () => {
+    messagesReceived.add(i);
+    if (messagesReceived.size == 4) {
+      console.log("received all 4 responses from the workers");
+    }
+  });
+
+  worker.postMessage({});
+}
+
+globalThis.addEventListener("unload", () => {
+  if (messagesReceived.size !== 4) {
+    console.log(
+      "received only %d responses from the workers",
+      messagesReceived.size,
+    );
+  }
+});