This is the follow-up to my previous post.

I wrote an example - obviously badly written on purpose - by which I prove why 100% code coverage is useless.

@ToJans �testing can be used very effectively to show the presence of bugs but never to show their absence� https://t.co/l9FujorBfo

— ? Michel Rijnders (@mrijn) 26 februari 2014

While these tests cover 100%, they miss a test case that I added in the comments on the bottom.