fix(ext/node): FsWatcher ref and unref (#22987)

Fixes https://github.com/denoland/deno/issues/22973

---------

Co-authored-by: Satya Rohith <me@satyarohith.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/unit_node/_fs/_fs_watch_test.ts b/tests/unit_node/_fs/_fs_watch_test.ts
index 01236a493..8e2fb619c 100644
--- a/tests/unit_node/_fs/_fs_watch_test.ts
+++ b/tests/unit_node/_fs/_fs_watch_test.ts
@@ -38,3 +38,17 @@ Deno.test({
     unwatchFile(file);
   },
 });
+
+Deno.test({
+  name: "watch.unref() should work",
+  sanitizeOps: false,
+  sanitizeResources: false,
+  async fn() {
+    const file = Deno.makeTempFileSync();
+    const watcher = watch(file, () => {});
+    // Wait for the watcher to be initialized
+    await wait(10);
+    // @ts-ignore node types are outdated in deno.
+    watcher.unref();
+  },
+});