I have a file called environment.js that looks like this:

exports.newEnvironment = function () {

    const thisObject = {
        DEMO_MODE: false,
        DEMO_MODE_HOST: "aws",
        BASE_PATH: "./",
        WEB_SERVER_URL: 'localhost'
        }
    return thisObject
}

I want to create an environment.test.js test file in Jest that will check to make sure that should any environment variables get added or removed, jest will catch it. How can I go about doing this?