feat(unstable): add `Deno.jupyter.broadcast` API (#20656)

Closes https://github.com/denoland/deno/issues/20591

---------

Co-authored-by: Kyle Kelley <rgbkrk@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/cli/tests/unit/jupyter_test.ts b/cli/tests/unit/jupyter_test.ts
new file mode 100644
index 000000000..40eaf4623
--- /dev/null
+++ b/cli/tests/unit/jupyter_test.ts
@@ -0,0 +1,9 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+import { assertThrows } from "./test_util.ts";
+
+Deno.test("Deno.jupyter is not available", () => {
+  assertThrows(
+    () => Deno.jupyter,
+    "Deno.jupyter is only available in `deno jupyter` subcommand.",
+  );
+});