What API does this problem complete?

POST /notes/:id/share creates a share link, and GET /share/:key reads the shared note.

What should the tests check?

Check that a link is issued, that the issued link returns title and body, and that an unknown link is handled properly.

Shared note linksWorkplace case

A real-world situation reported by 박**

Your task

Add share links to a small notes service. A user can make one of their notes shared, and anyone with the link can view the note title and body without logging in. POST /notes/:id/share creates a share link, and GET /share/:key shows the shared note. Complete NotesService.createShareLink and NotesService.getSharedNote.

Ground rules

•Use only in-memory data.
•Keep the controller route structure as-is.
•Add tests for new or changed behavior.

Not required

•Login or authorization system.
•Note create, update, or delete APIs.
•Persistent storage.

▶About this challenge

Complete a NestJS notes service with share-link creation and shared-note lookup. A user can make a note shared, and the returned link should let someone view the title and body.

Share-link features are common in collaboration and document tools. You need to separate the internal note model, the external link, the shared state, and the response shape. This problem focuses on the small API flow of issuing and reading a shared link.

What API does this problem complete?: POST /notes/:id/share creates a share link, and GET /share/:key reads the shared note.
What should the tests check?: Check that a link is issued, that the issued link returns title and body, and that an unknown link is handled properly.