Mock implementation of useDispatch with possibility of dynamic response

reactredux-useDispatch-mock.test.js

import * as ReactRedux from 'react-redux';

describe('nothing', () => {
  let loginFn = jest.fn(() => null);

  jest.spyOn(ReactRedux, 'useDispatch').mockImplementation(() => {
    return loginFn;
  });

  })
  it('does something', () => {
    const actual = render(<LoginComponent />); // component doing let dispatch = useDispatch(loginAction)
    fireEvent.press(actual.getByText(/Log in$/));
    expect(loginFn).toHaveBeenCalledTimes(1);
    expect(loginFn).toHaveBeenCalledWith('something');
  })
})

reactredux-useSelector-mock.test.js

import * as ReactRedux from 'react-redux';

describe('nothing', () => {

  jest.spyOn(ReactRedux, 'useSelector').mockImplementation(state => {
    return {loginStatus: UNPERFORMED};
  });

  })
  it('does something', () => {
    const actual = render(<LoginComponent />); // component having let loginStatus = useSelector(useSelector(state => state.user.loginStatus))
    fireEvent.press(actual.getByText(/Log in$/));
    expect(loginFn).toHaveBeenCalledTimes(1);
    expect(loginFn).toHaveBeenCalledWith('something');
  })
})