How to test a service that extends TypeOrmCrudService.

i am trying to unit test a basic service, which just extends typeormservice but gets the error below. The service was implemented has follows

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { TypeOrmCrudService } from '@nestjsx/crud-typeorm';
import { Authorization } from '../models/author.entity';
import { Repository } from 'typeorm';

/**
 * CRUD service for Authorization model
 */
@Injectable()
export class AuthorService extends TypeOrmCrudService<Authorization> {
  constructor(@InjectRepository(Authorization) public repository: Repository<Authorization>) {
    super(repository);
  }
}
 ``` 
Is there away to test or format, i had check through the typeormservice with little luck. thank you.

[mkolbusz]

I resolved this kind of error by using the mock class presented by @Darkein here: https://github.com/nestjsx/crud/issues/325#issuecomment-566666542 and adding the metadata property like the following: public metadata = { connection: { options: { type: null } }, columns: [], relations: [] }

So the final mock class for a repository is like below:

export class MockRepository<T> {
  public createQueryBuilder = jest.fn(() => this.queryBuilder);

  public manager = { transaction: a => Promise.resolve(a()) };
  public metadata = { connection: { options: { type: null } }, columns: [], relations: [] }

  public save = jest.fn();
  public delete = jest.fn();
  public update = jest.fn();
  public findOne = jest.fn();
  public findOneOrFail = jest.fn();
  public find = jest.fn();
  public getMany = jest.fn();

  public queryBuilder = {
    offset: jest.fn().mockReturnThis(),
    take: jest.fn().mockReturnThis(),
    orderBy: jest.fn().mockReturnThis(),
    skip: jest.fn().mockReturnThis(),
    limit: jest.fn().mockReturnThis(),
    from: jest.fn().mockReturnThis(),
    addFrom: jest.fn().mockReturnThis(),
    where: jest.fn().mockReturnThis(),
    andWhere: jest.fn().mockReturnThis(),
    innerJoinAndSelect: jest.fn().mockReturnThis(),
    leftJoinAndSelect: jest.fn().mockReturnThis(),
    getManyAndCount: jest.fn(),
    getMany: jest.fn(),
    getOne: jest.fn(),
    delete: jest.fn().mockReturnThis(),
    execute: jest.fn().mockReturnThis()
  };
}

[KnyGoo]

Not working for me:

TypeError: Cannot read property ‘options’ of undefined in constructor of service.