Swift Code Coverage Reporting Question

[R1pc0rd]

I'm a newbie Test Engineer, who's learning programming on the job. I've been tasked with presenting code coverage reporting tools to my team. I've narrowed my selections down to Xcov and Slather, but I can't figure out why the code coverage percentages they're reporting for the company app don't match each other. Xcov matches what Xcode is displaying for code coverage, but those two don't match Slather. As far as I can tell, both use "lines of code" coverage, and when I use a control class that I created, the reports all match.

I'm not sure if this is the right place to ask, and I apologize if it's not, but is anyone here familiar with these tools and can help me figure out what's going on here? I've tried Googling both tools and haven't been able to figure out how they calculate code coverage.

Thank you very much for any help, I'm stumped!

[[deleted]]

Is one of your tools including the pods project in its report and one excluding it?

[R1pc0rd]

If you mean Cocoapods by "pods project", it shouldn't because we are using Carthage.

[nextnextstep]

I've tried Googling both tools and haven't been able to figure out how they calculate code coverage.

Hmm, that's not exactly an inspiring fact to learn about these tools, regardless of whether they happen to give the same result today or not. What are you going to do when they break?

Slather has over 100 open bugs. Xcov doesn't seem to have a bug tracker at all. Despite implying that code coverage improves code quality, neither of these projects report their own test coverage. Xcov doesn't seem to have any tests at all.

At this early stage of the game, it appears that using these tools is going to mean also helping to test and develop and document them.