手动模拟未导入Nestjs

Question

我创建了一个__mocks__/post.service.ts来模拟post.service。

export const findAllFn = jest.fn();
export const PostService = jest.fn().mockImplementation(() => {
  return {
    findAll: findAllFn,
  };
});

并在我的测试中导入项目。

import { PostController } from './post.controller';

jest.mock('./post.service');

import { PostService, findAllFn } from './post.service';
import { TestingModule, Test } from '@nestjs/testing';

describe('Post Controller(jest mock manually loading from mocks files)', () => {
  let controller: PostController;
  let postService: PostService;

  beforeEach(async () => {
    const module: TestingModule = await Test.createTestingModule({
      providers: [PostService],
      controllers: [PostController],
    }).compile();

    controller = module.get<PostController>(PostController);
    postService = module.get<PostService>(PostService);
  });

  it('should get all posts', async () => {
    await controller.getAllPosts();
    expect(findAllFn).toHaveBeenCalled();
  });
});

运行测试并得到错误。

Module '"./post.service"' has no exported member 'findAllFn'
import { PostService, findAllFn } from './post.service';

但是根据jest docs，应该将其导入。