I kicked off the [unit test generator](/blog/how-can-we-generate-unit-tests-part-1-testability-score) idea with the first post a week ago. It was a great [success on Reddit](https://www.reddit.com/r/PHP/comments/103vtkt/how_can_we_generate_unit_tests_part_1_testability/), and I'm happy there is interest in the PHP community. I often got asked about the **testability score**. How does it work, and how can it be measured in actual code? Well, let's find out.