When looking at a candidate's report, you can click on the triangle (found on the left) to get a more detailed view of a candidate's results for each sub-case within that case that we are testing.
You can see on simple_two_elems that we are actually testing 2 different sub-cases to see if a correct solution has been achieved.
You also get the ability to see which sub-cases were failed and which have passed, so that you have a better idea of what happened in an individual case.
Note: Sub-cases are only available to be viewed in the regular report and do not appear in the e-mail or PDF reports.
If you have any additional questions about Sub-cases in Candidate's Report or would like to leave your feedback, please reach out to your Customer Success Manager or contact us at support@codility.com.