Uploading coverage reports to Codecov.io and Codacy
Code coverage is a very informative feature of testing. For PHP, PHPUnit offers functionality to run tests as well as gather coverage statistics.
Quite some time ago, I had the brilliant idea to visualize the commits in the Phalcon repository.
Recently I have put some effort in organizing some of our video files. These are mostly home movies, kids doing stuff, places we visited etc.
I have been advocating for testable code for more than a decade now. Admittedly, I have - in numerous cases - ignored tests and proceeded with rapid application development due to time constraints. However, the best code I ever produced was the one that was fully tested or very close to 100% covered by tests. You should always try your best to have your code covered by tests as much as possible.