The Storybook Driven Development example.
Dependents on @storybook/react@next and @storybook/testing-react@next.
https://storybook.js.org/blog/stories-are-tests/
https://storybook.js.org/blog/ui-testing-playbook/
https://storybook.js.org/blog/component-story-format-3-0/
https://medium.com/storybookjs/testing-lib-storybook-react-8c36716fab86