Hello all, I finally got a chance to do some final minor fixes and merge the operator unit test framework I posted a while back, thanks again to Path for doing a review on it. There are still some enhancements I would like to add to make the tests more flexible, but for examples of what can be done with the current version please check out the tests that were included with the patch [1]. Please don't hesitate to ask questions or suggest improvements. I think that writing tests in smaller units like this could go a long way in improving our coverage and ensure that we can write tests that consistently cover a particular execution path, independent of the query planner.
For anyone looking to get more familiar with how Drill executes operations, these tests might be a little easier way to start getting antiquated with the internals of Drill. The tests mock a number of the more complex parts of the system and try to produce a minimal environment where a single operation can run. [1] - https://github.com/apache/drill/blob/d93a3633815ed1c7efd6660eae62b7351a2c9739/exec/java-exec/src/test/java/org/apache/drill/exec/physical/unit/BasicPhysicalOpUnitTest.java Jason Altekruse Software Engineer at Dremio Apache Drill Committer
