Beau/bin/cli/__mocks__/fs.js

const fs = jest.genMockFromModule('fs');

fs.existsSync = filename => filename === 'beau.yml';
fs.readFileSync = () => `
version: 1
endpoint: https://example.org/

GET /anything:
  alias: anything
  payload:
    name: $env.params.name
`;

module.exports = fs;