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test/app.e2e-spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { INestApplication } from '@nestjs/common';
+import request from 'supertest';
+
+import { AppModule } from '../src/app.module';
+import { PrismaService } from '../src/prisma/prisma.service';
+
+describe('AppController (e2e)', () => {
+  let app: INestApplication;
+
+  beforeEach(async () => {
+    const moduleFixture: TestingModule = await Test.createTestingModule({
+      imports: [AppModule],
+    })
+      .overrideProvider(PrismaService)
+      .useValue({
+        $connect: jest.fn(),
+        $disconnect: jest.fn(),
+        $queryRaw: jest.fn().mockResolvedValue([{ '?column?': 1 }]),
+      })
+      .compile();
+
+    app = moduleFixture.createNestApplication();
+    await app.init();
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+
+  it('/health (GET)', () => {
+    return request(app.getHttpServer())
+      .get('/health')
+      .expect(200)
+      .expect(({ body }) => {
+        expect(body.status).toBe('ok');
+      });
+  });
+});