In one of our projects, we ‘somehow’ decided that every part of the system should be ‘unit test’-ed . It was a classical ETL->DWH->Cube project where web dashboard was built to show BI reports from cube (using MDX as reporting language).  Off course, unit testing was nothing new to our web developers. But, our data warehouse developers … More What I have learned in the name of unit testing of ETL, DWH, OLAP Cube and MDX