** I want to do unit testing of service in nestjs using mongoose ** This error comes up at the end Returning a Promise from "describe" is not supported. Tests must be defined synchronously. Returning a value from "describe" will fail the test in a future version of Jest.
`
import { Test, TestingModule } from '@nestjs/testing';
import { MongooseModule } from '@nestjs/mongoose';
import { closeInMongodConnection, rootMongooseTestModule } from '../test-utils/mongo/MongooseTestModule';
import { UserSchema } from './user.model';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';
describe('UserController', async () => {
let controller: UsersController;
let service: UsersService;
beforeEach(async () => {
const module: TestingModule = await Test.createTestingModule({
imports: [rootMongooseTestModule(), MongooseModule.forFeature([{ name: 'User', schema: UserSchema }])],
controllers: [UsersController],
providers: [UsersService],
}).compile();
controller = module.get<UsersController>(UsersController);
service = module.get<UsersService>(UsersService);
});
it('should be defined', () => {
expect(controller).toBeDefined();
});
it('should return all the events', async () => {
const result = {
totalDocs: 0,
resource: [],
};
const data = await service.findAll();
expect(data).toEqual(result);
});
afterAll(async () => {
await closeInMongodConnection();
});
});
`
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