refactor: dedupe channel outbound and monitor tests

src/telegram/webhook.test.ts

@@ -1,6 +1,6 @@
 import { createHash } from "node:crypto";
 import { once } from "node:events";
-import { request } from "node:http";
+import { request, type IncomingMessage } from "node:http";
 import { setTimeout as sleep } from "node:timers/promises";
 import { describe, expect, it, vi } from "vitest";
 import { startTelegramWebhook } from "./webhook.js";
@@ -24,6 +24,22 @@ const TELEGRAM_TOKEN = "tok";
 const TELEGRAM_SECRET = "secret";
 const TELEGRAM_WEBHOOK_PATH = "/hook";
 
+function collectResponseBody(
+  res: IncomingMessage,
+  onDone: (payload: { statusCode: number; body: string }) => void,
+): void {
+  const chunks: Buffer[] = [];
+  res.on("data", (chunk: Buffer | string) => {
+    chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
+  });
+  res.on("end", () => {
+    onDone({
+      statusCode: res.statusCode ?? 0,
+      body: Buffer.concat(chunks).toString("utf-8"),
+    });
+  });
+}
+
 vi.mock("grammy", async (importOriginal) => {
   const actual = await importOriginal<typeof import("grammy")>();
   return {
@@ -124,16 +140,7 @@ async function postWebhookPayloadWithChunkPlan(params: {
         },
       },
       (res) => {
-        const chunks: Buffer[] = [];
-        res.on("data", (chunk: Buffer | string) => {
-          chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
-        });
-        res.on("end", () => {
-          finishResolve({
-            statusCode: res.statusCode ?? 0,
-            body: Buffer.concat(chunks).toString("utf-8"),
-          });
-        });
+        collectResponseBody(res, finishResolve);
       },
     );
 
@@ -555,16 +562,8 @@ describe("startTelegramWebhook", () => {
               },
             },
             (res) => {
-              const chunks: Buffer[] = [];
-              res.on("data", (chunk: Buffer | string) => {
-                chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
-              });
-              res.on("end", () => {
-                resolve({
-                  kind: "response",
-                  statusCode: res.statusCode ?? 0,
-                  body: Buffer.concat(chunks).toString("utf-8"),
-                });
+              collectResponseBody(res, (payload) => {
+                resolve({ kind: "response", ...payload });
               });
             },
           );