Add unit tests for helpers

**Feature request**
It would be great to have encryption for lib.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_encryption` with default `false`.

Start by reconciling the title's request for unit tests for helpers with the body’s request for library encryption. The issue does not name files, helpers, entry points, or tests, so clarify the encryption scope and where the new enable_encryption option belongs before coding. Done should include a defined behavior for the default false setting and tests covering the agreed functionality.

Written by the indexing model from the issue text.