This has been a great discussion for me as someone that has been programming as a non-profession for over a decade, but is new to applying it to existing projec

This has been a great discussion for me as someone that has been programming as a non-profession for over a decade, but is new to applying it to existing projects that are not mine through open-source. One tool I haven't been able to find that I feel would be super helpful in the IDE is to show where code is covered in tests, like contexts when using python's `coverage`. Does anything like this exist? The benefits are two-fold: they help show me how the methods are supposed to be used, and also guide me on how and where I should test my fix or feature.