fix(ext/node): delay accept() call 2 ticks in net.Server#listen (#25481)

A workaround for the issue #25480

`Deno.Listener` can't be closed synchronously after `accept()` is
called. This PR delays the `accept` call 2 ticks (The listener callback
is called 1 tick later. So the 1 tick delay is not enough), and makes
`net.Server` capable of being closed synchronously.

This unblocks `npm:detect-port` and `npm:portfinder`

closes #18301 
closes #25175

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/unit_node/net_test.ts b/tests/unit_node/net_test.ts
index 708d06386..8196874f3 100644
--- a/tests/unit_node/net_test.ts
+++ b/tests/unit_node/net_test.ts
@@ -228,3 +228,22 @@ Deno.test("[node/net] BlockList doesn't leak resources", () => {
   blockList.addAddress("1.1.1.1");
   assert(blockList.check("1.1.1.1"));
 });
+
+Deno.test("[node/net] net.Server can listen on the same port immediately after it's closed", async () => {
+  const serverClosed = Promise.withResolvers<void>();
+  const server = net.createServer();
+  server.on("error", (e) => {
+    console.error(e);
+  });
+  server.listen(0, () => {
+    // deno-lint-ignore no-explicit-any
+    const { port } = server.address() as any;
+    server.close();
+    server.listen(port, () => {
+      server.close(() => {
+        serverClosed.resolve();
+      });
+    });
+  });
+  await serverClosed.promise;
+});