How to test this piece on JEST?

Question

Software testing

static get(action, params = {}) {

        return new Promise((resolve, reject) => {
          fetch(UrlHelper.apiUrl(action, params), {
            credentials: 'same-origin'
          })
            .then(response => {
              return Api.checkStatus(resolve, reject, response)
            })
            .then(([ ok, response ]) => {
              return ok ? resolve(response) : reject(response);
            });
        });
     }

How to test this piece on JEST ?
This is part of the API, so you don't actually need to make any requests.

Answer 1

https://medium.com/@rishabhsrao/mocking-and-testin...
as an option