rerender-test.js

import * as React from 'react';
import { render } from 'react-native-testing-library';
import { Provider } from 'react-redux';
import { createStore } from 'redux';
import { MyContainerComponent, MyPresentationalComponent } from '...';

// Create a real redux store, with your reducers and middleware, and a useful initial
// state tree...
const store = createStore(...);

// Note this test only makes sense if MyPresentationalComponent is a PureComponent
test('MyPresentationalComponent should not be re-rendered when any misc action is dispatched ', () => {
  const wrapper = render(
    <Provider store={store}>
      <MyContainerComponent />
    </Provider>
  );
  
  const presentationalComponentInstance = wrapper.getByType(MyPresentationalComponent).instance;
  const renderSpy = jest.spyOn(presentationalComponentInstance, 'render');
  
  store.dispatch({ type: 'DUMMY_ACTION ' });
  
  // render should not have been called... if it was that means MyPresentationalComponent
  // is getting changed props when it shouldn't be.
  expect(renderSpy).toHaveBeenCalledTimes(0);
});