express javascript jestjs node.js unit-testing

Unit Testing Controllers use Jest, NodeJS

I want to check a case that certain routes are calling the correct controller use Jest specific (mock or spy).

It is case specific for unit testing. Somebody can help me how to check it use jest. I don’t need verify kind of
expect (status code or res object) i need to check if controller have been called.

For instance:

// todoController.js
function todoController (req, res) {
res.send('Hello i am todo controller')
// index.spec.js
const express = require('express');
const request = require('request-promise');
const todoController = require('./todoController');
const app = express();
app.get('/todo', todoController)
test('If certain routes are calling the correct controller , controller should to have been called times one.', async() => {
await request({url: ''})