setup mock store for unit testing

smart-component.spec.tsx

import { render } from '@testing-library/react';
import React from 'react';
import { Provider } from 'react-redux';
import configureStore from 'redux-mock-store';

const mockStore = configureStore([]);

describe('...', () => {
  let store;

  beforeEach(() => {
    store = mockStore({<mock store state value>});
    store.dispatch = jest.fn();
  });
  
  it('...', () => {
    render(
      <Provider store={store}>
        <Component ...>
      </Provider>
    );
  });
});