Add unit tests for hooks

**Description**
Currently handlers lacks proper monitoring support.

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

**Priority**: Low/Medium

Start by locating the handlers and hook implementations, then find the existing unit-test entry points for them. The issue does not name files or specify the monitoring behavior and defaults, so confirm the expected configuration and define completion with the maintainers before making changes.

Written by the indexing model from the issue text.