Add unit tests for services

**Description**
Currently lib lacks proper import support.

**Proposed solution**
Add configurable import with sensible defaults.

**Priority**: Low/Medium

Start by inspecting lib and locating the service import path, then review any existing unit-test structure. Clarify the expected configurable import behavior and defaults before making changes; done means the import behavior is covered by unit tests and the defaults are sensible.

Written by the indexing model from the issue text.