Use Shift+Cmd+T (or Alt+Cmd+T for current daily builds) to switch between the production class and the related unit test.
If it doesn't work, you probably forgot to write a test (it happens sometimes :-))
See you at Java EE Workshops at MUC Airport (March 25th-28th)!
NEW MUC Airport Workshop: Migrating Java Client (Swing / Java FX) to Web Standards
Airport MUC workshops: Web (SPA, PWAs, Offline, Desktop, Mobile) Applications Essentials and Effective Web Applications. No migrations. #usetheplatform
Podcast: airhacks.fm and newsletter: airhacks.news
A book about rethinking Java EE Patterns