test process.env with Jest

Question

I have an app that depends on environmental variables like:

const APP_PORT = process.env.APP_PORT || 8080;

and I would like to test that fo

Answer 1

Expanding a bit on Serhan C.'s answer (https://stackoverflow.com/a/57944454/2708174)...

according to this blog https://tekloon.dev/using-dotenv-with-jest you can include "dotenv/config" directly in setupFiles, without having to create and reference an external script that calls require("dotenv").config().

i.e., simply do

module.exports = {
    setupFiles: ["dotenv/config"]
}