message: Mock storage functions
diff: // @flow
  -const { getServerInfoFromFilename } = require('../../storage/site');
  +const { getServerInfoFromFilename, getSiteFiles, getAllSites } = require('../../storage/site');
  +
  +jest.mock('../../storage', () => ({
  + readYamlFile: jest.fn(async filename => filename),
  + listYamlFiles: jest.fn(async () => ['compact/site1.yaml', 'compact/site2.yaml']),
  +}));
  describe('getServerInfoFromFilename', () => {
  test('should return server information', () => {
  