Testing react-intl components with enzyme

I've posted an answer to a similar question:

Injecting react-intl object into mounted Enzyme components for testing

You would be able to import { shallowWithIntl } from 'intl-helper' and then use shallowWithIntl() instead of Enzyme's shallow().

I got it working by using

const customMessage = shallow(<CustomMessage />, { context: intl });

instead.