Cavy + React Navigation (TabNavigator)

app.js

import { TabNavigator } from 'react-navigation'
import Ionicons from 'react-native-vector-icons/Ionicons'
import { hook } from 'cavy'

class Icon extends Component {
  render() {
    const { navigation, generateTestHook, routeName... } = this.props
    return <Ionicons ref={generateTestHook(`Navigation.${routeName}`)} onPress={() => navigation.navigate(routeName)} .../>
  }
}

const TestableIcon = hook(Icon)

const AppNavigator = TabNavigator(
    ...,
    
    navigationOptions: ({ navigation }) => ({
      tabBarIcon: ({ focused, tintColor }) => {
        const { routeName } = navigation.state
        return <TestableIcon navigation={navigation} routeName={routeName} />
      }
    })
  }
)

app_spec.js

const AppSpec = spec => {
  spec.describe('Smoke test', () => {
    spec.it('navigates to Profile screen from the Home screen', async () => {
      await spec.press('Navigation.Profile')
      await spec.exists(/* assert some component that you should see on 'Profile' exists */)
    })
  })
}

export default AppSpec