These tests make use of Jest and Puppeteer, with a setup very similar to that of the e2e tests, together with jest-image-snapshot for generating the visual diffs.

1. Check out trunk.
2. Run npm run test:visual to generate some base snapshots.
3. Check out the feature branch to be tested.
4. Run npm run test:visual again. If any tests fail, the diff images can be found in tests/visual-regression/specs/__image_snapshots__/__diff_output__.