Hacker News Reader

How do you test individual components in isolation if they depend on the global state store?

That's a code smell. 99% of components in a project should rely on props.

How does that play with Redux Hooks for example? https://react-redux.js.org/next/api/hooks

If you are using hooks in your components, you need the global store instance. To call this unit testing is too big a stretch for me.