1 files changed, 34 insertions, 0 deletions
diff --git a/tests/unit/broadcast_channel_test.ts b/tests/unit/broadcast_channel_test.ts
new file mode 100644
index 000000000..c5d7f7e7f
--- /dev/null
+++ b/tests/unit/broadcast_channel_test.ts
@@ -0,0 +1,34 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import { assertEquals } from "@test_util/std/assert/mod.ts";
+
+Deno.test("BroadcastChannel worker", async () => {
+  const intercom = new BroadcastChannel("intercom");
+  let count = 0;
+
+  const url = import.meta.resolve(
+    "../testdata/workers/broadcast_channel.ts",
+  );
+  const worker = new Worker(url, { type: "module", name: "worker" });
+  worker.onmessage = () => intercom.postMessage(++count);
+
+  const { promise, resolve } = Promise.withResolvers<void>();
+
+  intercom.onmessage = function (e) {
+    assertEquals(count, e.data);
+    if (count < 42) {
+      intercom.postMessage(++count);
+    } else {
+      worker.terminate();
+      intercom.close();
+      resolve();
+    }
+  };
+
+  await promise;
+});
+
+Deno.test("BroadcastChannel immediate close after post", () => {
+  const bc = new BroadcastChannel("internal_notification");
+  bc.postMessage("New listening connected!");
+  bc.close();
+});