feat: E2E 테스트가 병렬적으로 수행될 수 있도록 구현

- E2E 테스트 속도 54.32% 증가
- 각 테스트가 uuid값으로 임시 테스트 데이터베이스를 생성하고 테스트 완료 후 삭제
- test:e2e명령어 runInBand(순차적 테스트 실행)삭제

backend/package.json

@@ -19,7 +19,7 @@
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
-    "test:e2e": "jest --config ./test/jest-e2e.json --runInBand"
+    "test:e2e": "jest --config ./test/jest-e2e.json"
   },
   "dependencies": {
     "@nestjs/common": "^10.0.0",

backend/test/setup.ts

@@ -11,6 +11,7 @@ import { io } from 'socket.io-client';
 import { Member } from 'src/member/entity/member.entity';
 import { MemberService } from 'src/member/service/member.service';
 import * as portfinder from 'portfinder';
+import { v4 as uuidv4 } from 'uuid';
 
 export let app: INestApplication;
 export let githubApiService: GithubApiService;
@@ -178,7 +179,33 @@ export const listenAppAndSetPortEnv = async (app) => {
   process.env.PORT = port.toString();
 };
 
+const createDatabase = async (dbName: string) => {
+  const normalDataSource = getDataSource();
+  await normalDataSource.initialize();
+  await normalDataSource.query(`CREATE DATABASE \`${dbName}\`;`);
+  await normalDataSource.destroy();
+};
+
+const dropDatabase = async (dbName: string) => {
+  const normalDataSource = getDataSource();
+  await normalDataSource.initialize();
+  await normalDataSource.query(`DROP DATABASE IF EXISTS \`${dbName}\`;`);
+  await normalDataSource.destroy();
+};
+
+const getDataSource = () => {
+  return new DataSource({
+    type: 'mysql',
+    host: process.env.DATABASE_HOST,
+    port: +process.env.DATABASE_PORT,
+    username: process.env.DATABASE_USER,
+    password: process.env.DATABASE_PASSWORD,
+  });
+};
+
 beforeAll(async () => {
+  process.env.DATABASE_NAME = uuidv4();
+  await createDatabase(process.env.DATABASE_NAME);
   await appInit();
 });
 
@@ -195,4 +222,5 @@ beforeEach(async () => {
 
 afterAll(async () => {
   await app.close();
+  await dropDatabase(process.env.DATABASE_NAME);
 });