jest-global-setup.js

// Why this file is .js and not .ts
// https://github.com/kulshekhar/ts-jest/issues/411

module.exports = async () => {
    const db = process.env.PGDATABASE;

    if (db && db !== 'test') {
        // eslint-disable-next-line
        console.error(`
        
        > jest-global-setup.js
        Running test on a non 'test' db will wipe out your entire db!
        PGDATABASE is specified as '${db}' and not 'test'. Aborting...
        
        `);
        throw new Error();
    }
};