The basic issue with tests alongside code is that when someone wants to make a minor correction to the test steps, it counts as a code change or a “commit”, which in turn means it sometimes needs merging. So It’s overhead, and my experience is that if it takes > 5 minutes to change a test instruction, it ends up not getting done.
I am seeing data in there that belongs in the TMS system. Priority and Environment are data that belongs in the test “iteration”, not in the test case, likewise the estimatedTime. I have seen EstimatedTime abused, people jsut guess, and then forget to adjust the time taken when they suddenly realize that installing the data needed added 5 minutes to their estimate, so the estimate field becomes useless. I am suspecting that stripping out some of the metadata and moving it to the right place in a TMS system or in a report, will help. For example the time estimate can always be found if you look for a report at the last time the test got run.
Likewise the test status probably does not belong in the source, I’d expect that to change often…but all in all the rest of what you have there is what I like to have and currently do have for automated test comments. The trick is maintaining it once you reach a volume of > 100 test cases, it then becomes a full-time job though if you have lots of stuff to maintain. For example test ID’s need to come from the TMS system, but another approach is simply to either hash the test name, or make a decision to never ever rename tests. The latter is not that hard to stick to and removes the need for an ID. I use hierarchical or folder structure for tests, and have some naming conventions I “like” to aim for, and this ultimately prevents name collisions, so full-names for a test become safe to use as unique ID’s .
I’m not really a manual tester myself (all automation requires a lot of manual exploration) so I am no expert on this problem. But keen to know from the many experienced manual testers, how they keep test cases updated.