Test ES6 modules with Jest

Question

How to test ES6 modules with Jest.

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Example:

sum.js

const sum = function (a, b         


        

Answer 1

The solutions above didn't work for me. I was able to solve with this:

yarn add --dev babel-jest @babel/core @babel/preset-env @babel/preset-typescript

babel.config.js

module.exports = {
    presets: [
        [
            '@babel/preset-env',
            {
                targets: {
                    node: 'current',
                },
            },
        ],
        '@babel/preset-typescript'
    ],
};

where I'm using typescript.

Reference.