first commit

src/modules/health/health.controller.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { HealthController } from './health.controller';
+import { HealthService } from './health.service';
+
+describe('HealthController', () => {
+  let controller: HealthController;
+  const checkMock = jest.fn().mockResolvedValue({
+    status: 'ok',
+    timestamp: new Date().toISOString(),
+    database: 'up',
+  });
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [HealthController],
+      providers: [
+        {
+          provide: HealthService,
+          useValue: { check: checkMock },
+        },
+      ],
+    }).compile();
+
+    controller = module.get<HealthController>(HealthController);
+  });
+
+  it('deve retornar status ok e database up', async () => {
+    const result = await controller.check();
+
+    expect(checkMock).toHaveBeenCalled();
+    expect(result.status).toBe('ok');
+    expect(result.database).toBe('up');
+    expect(result.timestamp).toBeDefined();
+  });
+});

src/modules/health/health.controller.ts

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+import { Controller, Get } from '@nestjs/common';
+import { HealthService, HealthStatus } from './health.service';
+
+@Controller('health')
+export class HealthController {
+  constructor(private readonly healthService: HealthService) {}
+
+  @Get()
+  check(): Promise<HealthStatus> {
+    return this.healthService.check();
+  }
+}

src/modules/health/health.module.ts

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+import { Module } from '@nestjs/common';
+import { HealthController } from './health.controller';
+import { HealthService } from './health.service';
+
+@Module({
+  controllers: [HealthController],
+  providers: [HealthService],
+})
+export class HealthModule {}

src/modules/health/health.service.ts

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+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../../config/prisma.service';
+
+export interface HealthStatus {
+  status: 'ok' | 'error';
+  timestamp: string;
+  database: 'up' | 'down';
+}
+
+@Injectable()
+export class HealthService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async check(): Promise<HealthStatus> {
+    const database = await this.checkDatabase();
+
+    return {
+      status: database === 'up' ? 'ok' : 'error',
+      timestamp: new Date().toISOString(),
+      database,
+    };
+  }
+
+  private async checkDatabase(): Promise<'up' | 'down'> {
+    try {
+      await this.prisma.$queryRaw`SELECT 1`;
+      return 'up';
+    } catch {
+      return 'down';
+    }
+  }
+}