Module mock in Jest using `react-redux/connect` as example

react-redux.ts

const connect = jest.fn((mapStateToProps) => {
  const React = require.requireActual('react');
  const { rootReducer } = require.requireActual('../domains/root.reducer');

  const state = rootReducer({}, { type: '__jest-mock-react-redux__' });
  const fromConnectProps = mapStateToProps(state);

  return jest.fn(Component => {
    function Wrapper(props: any) {
      const finalProps = { ...props, ...fromConnectProps };
      return React.createElement(Component, finalProps);
    }
    return Wrapper;
  });
});

export {
  connect
}