Each directory in the fixtures directory represents one testing scenario, with a corresponding test file for each bundler we currently support.
When pnpm run test:e2e is ran, we run jest, which will pick up all *.test.ts files.
In the test-api directory is a simple API that we use to create more realistic testing scenarios for each bundler.
In the test-apps directory are a set of apps that we use to test the integration with each bundler.