test: add global jest setup/teardown for db/redis

Author: mijinummi

backend/jest.config.ts

@@ -15,4 +15,7 @@ export default {
     "^(\\.{1,2}/.*)\\.js$": "$1",
   },
   testMatch: ["**/*.test.ts", "**/*.spec.ts"],
+
+  // 👇 Point to the actual location of setup.ts
+  setupFilesAfterEnv: ["<rootDir>/src/__tests__/setup.ts"],
 };

backend/package-lock.json

@@ -0,0 +1,20 @@
+import { db } from "../src/db/connection";
+import Redis from "ioredis";
+
+let redis: Redis;
+
+beforeAll(async () => {
+  redis = new Redis(process.env.REDIS_URL);
+  if (db.connect) {
+    await db.connect();
+  }
+});
+
+afterAll(async () => {
+  if (redis) {
+    await redis.quit();
+  }
+  if (db.end) {
+    await db.end();
+  }
+});