test/improve test coverage

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src/contact/contact.controller.spec.ts

@@ -2,14 +2,24 @@ import { Test, TestingModule } from '@nestjs/testing';
 import { ContactController } from './contact.controller';
 import { ContactService } from './contact.service';
 import { MailerModule } from '../mailer/mailer.module';
+import { ContactMessage } from './schemas/contact-message.schema';
 
 describe('ContactController', () => {
   let controller: ContactController;
 
+  const contactServiceMock = {
+    sendMessage: jest.fn(),
+  };
+
   beforeEach(async () => {
     const module: TestingModule = await Test.createTestingModule({
       imports: [MailerModule],
-      providers: [ContactService],
+      providers: [
+        {
+          provide: ContactService,
+          useValue: contactServiceMock,
+        },
+      ],
       controllers: [ContactController],
     }).compile();
 
@@ -19,4 +29,11 @@ describe('ContactController', () => {
   it('should be defined', () => {
     expect(controller).toBeDefined();
   });
+
+  it('should call sendMessage', async () => {
+    const spyer = jest.spyOn(contactServiceMock, 'sendMessage');
+    await controller.sendContactMessage({ contactMessage: new ContactMessage() });
+    expect(spyer).toBeCalledTimes(1);
+    expect(spyer).toBeCalledWith(new ContactMessage());
+  });
 });