How to debug simple mapping based pipeline?

[ossDataEngineer]

Hello,

I have a simple mapping pipeline which has mapping input at start and mapping output at the end. How can I debug this pipeline? How can I supply mapping input field values to simulate this pipeline behaviour to see mapping output field values when using apache hop IDE?

PS: I set custom logging on simple mapping transform, which doesnot log any details about it.

[hansva]

You can use unit testing for this and provide sample data https://hop.apache.org//manual/latest/metadata-types/pipeline-unit-test.html