Javascript 如何在使用Jest测试Node.js应用程序时模拟调用的函数中的方法

关于同一个问题，有很多问题被问到，我试图解决很多问题，但我似乎没有找到正确的答案

我正在编写一些单元测试来使用Jest库测试功能

我有一个名为postController.js的控制器，它有一个我正在测试的功能，您可以在下面看到

postController.js

const globalResponseHandler(item1, item2, item3) {
   // do something
}


exports.createPost = async (req, res, next) => {
    const doc = Post.create({ userObj });

    globalResponseHandler(doc, 201, res);
}

const postController = require('./postController');
const Post = require('./models/postModel');
const httpMocks = require('node-mocks-http');

Post.create = jest.fn();

let req, res, next;
beforeEach(() => {
    req = httpMocks.createRequest();
    res = httpMocks.createResponse();
    next = null;
 });

describe('PostController.createPost', () => {

     it('should call Post.create', async () => {

          await postController.createPost(req, res, next);
          expect(Post.create).toBeCalled();

      }
}

我有一个测试文件来测试后置控制器

postController.test.js

const globalResponseHandler(item1, item2, item3) {
   // do something
}


exports.createPost = async (req, res, next) => {
    const doc = Post.create({ userObj });

    globalResponseHandler(doc, 201, res);
}

const postController = require('./postController');
const Post = require('./models/postModel');
const httpMocks = require('node-mocks-http');

Post.create = jest.fn();

let req, res, next;
beforeEach(() => {
    req = httpMocks.createRequest();
    res = httpMocks.createResponse();
    next = null;
 });

describe('PostController.createPost', () => {

     it('should call Post.create', async () => {

          await postController.createPost(req, res, next);
          expect(Post.create).toBeCalled();

      }
}

因此，如果我删除globalResponseHandler处理程序方法，测试就会通过

但是如果我添加globalResponseHandler方法，它会抛出以下错误

承诺被拒绝，原因是“TypeError:无法读取未定义的属性“\u id”。]

据我所知，它正在调用globalResponseHandler函数，这需要模拟

如何模拟未导出的函数