renderWithReduxRouter.js

const renderWithReduxAndRouter = (
  routes,
  {
    initialState = {},
    store = createStore(reducer, initialState, applyMiddleware(thunk))
  } = {},
  {
    route = '/',
    history = createMemoryHistory({ initialEntries: [route] })
  } = {}
) => ({
  ...render(
    <Provider store={store}>
      <Router history={history}>
        <Switch>{routes}</Switch>
      </Router>
    </Provider>
  ),
  store,
  history
})