Add unit tests for data

**Feature request**
It would be great to have pagination for parsers.

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

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

Start by locating the parser configuration and the existing parser-related tests. Verify how pagination is represented and where the enable_pagination option belongs; done means pagination is covered by unit tests and the option defaults to false.

Written by the indexing model from the issue text.