fix(ext/node): refactor http.ServerResponse into function class (#26210)

While testing, I found out that light-my-request relies on
`ServerResponse.connection`, which is deprecated, so I added that and
`socket`, the non deprecated property.

It also relies on an undocumented `_header` property, apparently for
[raw header
processing](https://github.com/fastify/light-my-request/blob/v6.1.0/lib/response.js#L180-L186).
I added it as an empty string, feel free to provide other approaches.

Fixes #19901

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 78 insertions, 2 deletions

diff --git a/tests/unit_node/http_test.ts b/tests/unit_node/http_test.ts
index 0faf7fb34..84d6f5727 100644
--- a/tests/unit_node/http_test.ts
+++ b/tests/unit_node/http_test.ts
@@ -3,10 +3,14 @@
 // deno-lint-ignore-file no-console
 
 import EventEmitter from "node:events";
-import http, { type RequestOptions, type ServerResponse } from "node:http";
+import http, {
+  IncomingMessage,
+  type RequestOptions,
+  ServerResponse,
+} from "node:http";
 import url from "node:url";
 import https from "node:https";
-import net from "node:net";
+import net, { Socket } from "node:net";
 import fs from "node:fs";
 import { text } from "node:stream/consumers";
 
@@ -1704,3 +1708,75 @@ Deno.test("[node/http] upgraded socket closes when the server closed without clo
   await clientSocketClosed.promise;
   await serverProcessClosed.promise;
 });
+
+// deno-lint-ignore require-await
+Deno.test("[node/http] ServerResponse.call()", async () => {
+  function Wrapper(this: unknown, req: IncomingMessage) {
+    ServerResponse.call(this, req);
+  }
+  Object.setPrototypeOf(Wrapper.prototype, ServerResponse.prototype);
+
+  // deno-lint-ignore no-explicit-any
+  const wrapper = new (Wrapper as any)(new IncomingMessage(new Socket()));
+
+  assert(wrapper instanceof ServerResponse);
+});
+
+Deno.test("[node/http] ServerResponse _header", async () => {
+  const { promise, resolve } = Promise.withResolvers<void>();
+  const server = http.createServer((_req, res) => {
+    assert(Object.hasOwn(res, "_header"));
+    res.end();
+  });
+
+  server.listen(async () => {
+    const { port } = server.address() as { port: number };
+    const res = await fetch(`http://localhost:${port}`);
+    await res.body?.cancel();
+    server.close(() => {
+      resolve();
+    });
+  });
+
+  await promise;
+});
+
+Deno.test("[node/http] ServerResponse connection", async () => {
+  const { promise, resolve } = Promise.withResolvers<void>();
+  const server = http.createServer((_req, res) => {
+    assert(Object.hasOwn(res, "connection"));
+    assert(res.connection instanceof Socket);
+    res.end();
+  });
+
+  server.listen(async () => {
+    const { port } = server.address() as { port: number };
+    const res = await fetch(`http://localhost:${port}`);
+    await res.body?.cancel();
+    server.close(() => {
+      resolve();
+    });
+  });
+
+  await promise;
+});
+
+Deno.test("[node/http] ServerResponse socket", async () => {
+  const { promise, resolve } = Promise.withResolvers<void>();
+  const server = http.createServer((_req, res) => {
+    assert(Object.hasOwn(res, "socket"));
+    assert(res.socket instanceof Socket);
+    res.end();
+  });
+
+  server.listen(async () => {
+    const { port } = server.address() as { port: number };
+    const res = await fetch(`http://localhost:${port}`);
+    await res.body?.cancel();
+    server.close(() => {
+      resolve();
+    });
+  });
+
+  await promise;
+});