Introduce tests for basic functionality
These tests are related to the very basic functionality introduced in https://gitext.gfz-potsdam.de/dynamicexposure/the-engine/the-engine/-/merge_requests/20/
These tests are related to the very basic functionality introduced in https://gitext.gfz-potsdam.de/dynamicexposure/the-engine/the-engine/-/merge_requests/20/