feat: test ping

Created a health check endpoint with NestJS module structure. Added jest dependency to package.json to fix test runner issue. Implemented HealthModule, HealthController, and HealthService with GET /health endpoint returning status, timestamp, and uptime. Added comprehensive unit tests for both controller and service components.

Generated by AI Feature Factory

src/app.module.ts

@@ -0,0 +1,11 @@
+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+import { HealthModule } from './health/health.module';
+
+@Module({
+  imports: [HealthModule],
+  controllers: [AppController],
+  providers: [AppService],
+})
+export class AppModule {}

src/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;
+  let service: HealthService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [HealthController],
+      providers: [HealthService],
+    }).compile();
+
+    controller = module.get<HealthController>(HealthController);
+    service = module.get<HealthService>(HealthService);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+
+  describe('getHealth', () => {
+    it('should return health status', () => {
+      const result = {
+        status: 'OK',
+        timestamp: '2023-01-01T00:00:00.000Z',
+        uptime: 123.456,
+      };
+
+      jest.spyOn(service, 'getHealthStatus').mockReturnValue(result);
+
+      expect(controller.getHealth()).toBe(result);
+      expect(service.getHealthStatus).toHaveBeenCalled();
+    });
+  });
+});

src/health/health.controller.ts

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

src/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/health/health.service.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { HealthService } from './health.service';
+
+describe('HealthService', () => {
+  let service: HealthService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [HealthService],
+    }).compile();
+
+    service = module.get<HealthService>(HealthService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+
+  describe('getHealthStatus', () => {
+    it('should return health status with OK status', () => {
+      const result = service.getHealthStatus();
+
+      expect(result).toHaveProperty('status', 'OK');
+      expect(result).toHaveProperty('timestamp');
+      expect(result).toHaveProperty('uptime');
+      expect(typeof result.timestamp).toBe('string');
+      expect(typeof result.uptime).toBe('number');
+    });
+
+    it('should return current timestamp', () => {
+      const before = new Date();
+      const result = service.getHealthStatus();
+      const after = new Date();
+
+      const timestamp = new Date(result.timestamp);
+      expect(timestamp.getTime()).toBeGreaterThanOrEqual(before.getTime());
+      expect(timestamp.getTime()).toBeLessThanOrEqual(after.getTime());
+    });
+  });
+});

src/health/health.service.ts

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+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class HealthService {
+  getHealthStatus() {
+    return {
+      status: 'OK',
+      timestamp: new Date().toISOString(),
+      uptime: process.uptime(),
+    };
+  }
+}