fix: check if BroadcastChannel is open before sending (#17366)

Fixes #16978

1 files changed, 7 insertions, 1 deletions

diff --git a/cli/tests/unit/broadcast_channel_test.ts b/cli/tests/unit/broadcast_channel_test.ts
index 06821c4db..b13a47574 100644
--- a/cli/tests/unit/broadcast_channel_test.ts
+++ b/cli/tests/unit/broadcast_channel_test.ts
@@ -2,7 +2,7 @@
 import { assertEquals } from "../../../test_util/std/testing/asserts.ts";
 import { deferred } from "../../../test_util/std/async/deferred.ts";
 
-Deno.test("broadcastchannel worker", async () => {
+Deno.test("BroadcastChannel worker", async () => {
   const intercom = new BroadcastChannel("intercom");
   let count = 0;
 
@@ -27,3 +27,9 @@ Deno.test("broadcastchannel worker", async () => {
 
   await promise;
 });
+
+Deno.test("BroadcastChannel immediate close after post", () => {
+  const bc = new BroadcastChannel("internal_notification");
+  bc.postMessage("New listening connected!");
+  bc.close();
+});