In my previous job I used a Python library called openpyxl to write a suite of unit tests for some unwieldy spreadsheets that our team owned. The tests were ru

In my previous job I used a Python library called openpyxl to write a suite of unit tests for some unwieldy spreadsheets that our team owned. The tests were run every time the sheets were updated so we had a form of test driven development when working with the sheets. There was a long running project on the go to retire the spreadsheets and replace them with a proper application but that was a multiyear effort.