Navigation & Redux setup providing errors

I am trying to write a test for an app using react-navigation and I am running into issues of the route and params being read correctly.

I am getting an error of

TypeError: Cannot read property ‘params’ of undefined

on const [leadId] = useState(route.params.leadId);

my components looks like

export default function AComponent() {
  const route = useRoute();
  const navigation = useNavigation();
  const dispatch = useDispatch();
  const [leadId] = useState(route.params.leadId);

...rest
}

I have tried following but I received Warning: React.createElement: type is invalid when wrapping the component.

My test looks like

import React from 'react';
import { Provider } from 'react-redux';
import { NavigationContainer } from '@react-navigation/native';
import { render, fireEvent, cleanup } from 'react-native-testing-library';
import configureMockStore from 'redux-mock-store';

import AComponent from 'components/contact/AComponent';

const mockStore = configureMockStore([]);

describe('<AComponent />', () => {
  let getByTestId, store;

  beforeEach(() => {
    store = mockStore({});

    ({ getByTestId } = render(
      <Provider store={store}>
        <NavigationContainer>
          <AComponent />
         </NavigationContainer>
      </Provider>
    ));
  });
});

my mock is

jest.mock('@react-navigation/native', () => {
  return {
    useNavigation: () => ({ goBack: jest.fn() }),
    useRoute: jest.fn(),
  };
});

I am not sure if I am wrapping the components incorrectly, or if I am missing something else.

Any ideas or help would be greatly appreciated.

Thanks.

[thymikee]

@hisham-blackbuck please don’t mock the libraries. It’s hardly ever necessary. Instead use them in your test code as you’d use them in the app. It often comes with some boilerplate, but it’s not really new code, you already use it similarly in your app. When mocking, you’ll need to maintain a more complex setup that’s prone to errors because of implementation details changing in the library. Don’t do it please.

[AugustinLF]

You can see some examples on how to test things with redux in the docs.