The development of a testing framework using test_that has made some good progress. We have now define two categories of tests; expected numerical values for combined and split data set as well as mathematical properties.
We have also defined a new data set for testing that will be available locally and on the Opal server. It includes all the data type available in R and also some factor. We are currently in the last phase to integrate it with our continuous integration test.
I will provide more information in wiki in the coming weeks and provide more information too. You can have a look in the following link, under test and test_that.
I value your feedback.