Hi Niels, You can find detailed suggestions here: https://github.com/paul-rogers/drill/wiki/UDFs-Background-Information
In particular, see the page on debugging UDFs. - Paul Sent from my iPhone > On Jan 22, 2018, at 7:09 AM, Charles Givre <[email protected]> wrote: > > Hi Niels, > Take a look at this file: > > https://github.com/cgivre/drill/blob/67804e9d8a4634df8dbf60e848533a62d64dee64/exec/java-exec/src/test/java/org/apache/drill/exec/fn/impl/TestNetworkFunctions.java > > <https://github.com/cgivre/drill/blob/67804e9d8a4634df8dbf60e848533a62d64dee64/exec/java-exec/src/test/java/org/apache/drill/exec/fn/impl/TestNetworkFunctions.java> > > This should be a pretty good template for unit tests for a function. > — C > >> On Jan 22, 2018, at 10:01, Niels Basjes <[email protected]> wrote: >> >> Hi, >> >> I was reading through the tutorial page on how to write a custom function >> for Drill and I've alos looked at some functions I found on the internet. >> >> There is one thing I would really like to know that I have not yet found so >> far: How do I unut test if I did it right? >> >> Especially the effects of the various annotations and the fact that you >> need to specify all classes "fully" without an import. >> >> -- >> Best regards / Met vriendelijke groeten, >> >> Niels Basjes >
