Erstellen von Tests in einer echten Datenbank mit NestJS, TypeORM und PostgreSQL

import * as dotenv from 'dotenv';
import { Test, TestingModule } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm'; 
dotenv.config();
describe('Queryes only test', () => {
    let app: INestApplication;
    let foodRepo: FoodRepository;

    beforeAll(async () => {
        const moduleFixture: TestingModule = await Test.createTestingModule({
            imports: [
                TypeOrmModule.forRootAsync({
                    useFactory: (configService: any) => ({
                        type: 'postgres',

                        host: process.env.TYPEORM_HOST,
                        port: Number(process.env.TYPEORM_PORT),
                        username: process.env.TYPEORM_USERNAME,
                        password: process.env.TYPEORM_PASSWORD,
                        database: process.env.TYPEORM_DATABASE,

                        entities: ['src/app/**/entities/*.entity.*'],
                        synchronize: false,
                        logging: true /* That will make the sql queryes appear in the console */
                    })
                }),
                TypeOrmModule.forFeature([FoodRepository])
            ]
        }).compile();

        app = moduleFixture.createNestApplication();
        await app.init();

        foodRepo = moduleFixture.get<FoodRepository>(FoodRepository);
    });

    jest.setTimeout(30000);

    it('Must find foods from regular customers', async () => {
        const foodsFromRegularCustomers = await foodRepo.findFoodsFromRegularCustomers().getMany();
        expect(Array.isArray(foodsFromRegularCustomers)).toBeTruthy();
    });

    afterAll(async () => {
        await app.close();
    });
});

async findFoodsFromRegularCustomers() {
  const currentDate = new Date();
  const startOfWeek = new Date(currentDate.setDate(currentDate.getDate() - currentDate.getDay()));

  return this.createQueryBuilder('food')
    .innerJoin('food.customer', 'customer')
    .innerJoin('customer.orders', 'orders')
    .select([
      'customer.id', 
      'customer.name', 
      'customer.cpf', 
      'customer.address'
    ])
    .where('orders.createdAt >= :startOfWeek', { startOfWeek })
    .groupBy('customer.id')
    .having('COUNT(orders.id) > :minOrders', { minOrders: 10 })  
}