I failed to mentioned that the tests themselves founds lots of bugs. I needed those tests. Also, those weren't mere individual tests, I ran a number of property

I failed to mentioned that the tests themselves founds lots of bugs. I needed those tests. Also, those weren't mere individual tests, I ran a number of property-based tests as well, they tend to be much more thorough. I wrote those tests because I was writing foundational code. The outer layers hardly have any test, which is good enough for the proof of concept we were asked for. We'll need to be a bit more rigorous to polish this into production.