jest.conf.js

Jest config

const {defaults} = require('jest-config');
module.exports = {
    // ...
    moduleFileExtensions: [...defaults.moduleFileExtensions, 'ts', 'tsx'],
    setupFiles: ["./js/all-browsers/urls.js", "./tests/jest.jquery.js"],
    rootDir: '../',
    // ...
};

///
https://jestjs.io/docs/en/configuration.html#options
https://www.jetbrains.com/help/phpstorm/running-unit-tests-on-jest.html
///
files needed to be tested got to be with .test.js. name.
files needed to load everytime one test loads should be declared in setupFiles.It may be some global variables.
All paths writing relative to jest.conf.js!