feat: 后端也添加了写了一半的人机验证模块

apps/backend/src/captcha/captcha.service.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { CaptchaService } from './captcha.service';
+
+describe('CaptchaService', () => {
+  let service: CaptchaService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [CaptchaService],
+    }).compile();
+
+    service = module.get<CaptchaService>(CaptchaService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});