Learning TDD together with Stickee

Yari and me recently started doing a project to learn both Spring Boot and test-driven development (TDD). The project, named Stickee, is intended to be a Pastebin clone, but we plan to add more features in the future, like uploading other kind of files. The project follows a typical Spring Boot architecture with controllers, models and services. Today we did the two basic operations of the NoteService: get(), which returns a note given its resource locator, and create() which creates a new note.