FYI: fixing the import issue with Jest breaks using class properties shorthand and breaks dev build. Get the following in Terminal when running npm run start script:
ERROR in ./src/App.js
/Users/mariacam/Development/text-to-speech-app/src/App.js
2:18 error Parse errors in imported module './components/text/Text': Unexpected token = (6:11) import/namespace
2:18 error Parse errors in imported module './components/text/Text': Unexpected token = (6:11) import/default
2:18 warning Parse errors in imported module './components/text/Text': Unexpected token = (6:11) import/no-named-as-default
2:18 warning Parse errors in imported module './components/text/Text': Unexpected token = (6:11) import/no-named-as-default-member
✖ 4 problems (2 errors, 2 warnings)