Corrigiendo email controller test

src/email/email.controller.spec.ts

@@ -1,12 +1,25 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { EmailController } from './email.controller';
+import { EmailService } from './email.service';
 
 describe('EmailController', () => {
   let controller: EmailController;
 
+  const mockEmailService = {
+    sendEmail: jest.fn(),
+    sendConstancias: jest.fn(),
+    getParticipantesExcel: jest.fn(),
+  };
+
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       controllers: [EmailController],
+      providers: [
+        {
+          provide: EmailService,
+          useValue: mockEmailService,
+        },
+      ],
     }).compile();
 
     controller = module.get<EmailController>(EmailController);