miniblog.

Test code is total: we require it to always terminate or it's a failure! It also typically has 100% line and branch coverage. I feel way less nervous about refactoring tests, you can always just run them.

I don't care what your project's test coverage is, but the fact that you're measuring it is a great sign.

The examples coverage in Rust is exceptionally good. It's weird how few languages include an example in their stdlib docs for sorting.