@magento/pwa-buildpack/__mocks__/hastily.js

Build/Layout optimization tooling and Peregrine framework adapters for the Magento PWA

const middleware = jest.fn();
const hastily = (module.exports = {
    imageopto: jest.fn().mockReturnValue(middleware),
    hasSupportedExtension: () => true
});
hastily.__mockMiddleware = middleware;