fix(testing): use vitest assertions in shutdown tests

integration/graceful-shutdown/e2e/express.spec.ts

@@ -1,7 +1,6 @@
 import { NestFactory } from '@nestjs/core';
 import { ExpressAdapter } from '@nestjs/platform-express';
 import { INestApplication } from '@nestjs/common';
-import { expect } from 'chai';
 import * as http from 'http';
 import { AppModule } from '../src/app.module';
 
@@ -46,10 +45,10 @@ describe('Graceful Shutdown (Express)', () => {
 
     // The in-flight request should finish successfully
     const response = await requestPromise;
-    expect(response).to.equal('ok');
+    expect(response).toBe('ok');
 
     await closePromise;
-  }).timeout(10000);
+  }, 10000);
 
   it('should return 503 for NEW queued requests on existing connections during shutdown', async () => {
     app = await NestFactory.create(AppModule, new ExpressAdapter() as any, {
@@ -86,9 +85,9 @@ describe('Graceful Shutdown (Express)', () => {
     req1.on('error', () => {});
 
     const status = await statusPromise;
-    expect(status).to.equal(503);
+    expect(status).toBe(503);
 
     await closePromise;
     agent.destroy();
-  }).timeout(10000);
+  }, 10000);
 });

integration/graceful-shutdown/tsconfig.json

@@ -1,18 +1,30 @@
 {
-  "extends": "../../tsconfig.json",
   "compilerOptions": {
+    "types": ["vitest/globals"],
     "module": "commonjs",
-    "target": "es2020",
-    "strict": true,
+    "declaration": false,
+    "noImplicitAny": false,
+    "removeComments": true,
+    "noLib": false,
     "esModuleInterop": true,
-    "baseUrl": ".",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "target": "ES2023",
+    "sourceMap": true,
+    "allowJs": true,
+    "strictNullChecks": true,
+    "outDir": "./dist",
     "paths": {
-      "@nestjs/common": ["../../packages/common/index.ts"],
-      "@nestjs/core": ["../../packages/core/index.ts"],
-      "@nestjs/platform-express": ["../../packages/platform-express/index.ts"],
-      "@nestjs/testing": ["../../packages/testing/index.ts"]
+      "@nestjs/common": ["../../packages/common"],
+      "@nestjs/common/*": ["../../packages/common/*"],
+      "@nestjs/core": ["../../packages/core"],
+      "@nestjs/core/*": ["../../packages/core/*"],
+      "@nestjs/platform-express": ["../../packages/platform-express"],
+      "@nestjs/platform-express/*": ["../../packages/platform-express/*"],
+      "@nestjs/testing": ["../../packages/testing"],
+      "@nestjs/testing/*": ["../../packages/testing/*"]
     }
   },
   "include": ["src/**/*", "e2e/**/*"],
   "exclude": ["node_modules"]
-}
+}