If you’re aiming for test-driven development, you need to make sure that your code is getting properly covered by tests as you go. Originally released with...
https://blogs.unity3d.com/2020/05/22/code-coverage-spot-gaps-in-your-tests/
* Code Coverage preview package * Test Runner * version 0.3.0-preview * Unity 2020.1 beta * coverage API * ReportGenerator * install * HTML Report * Test Runner * Coverage Recording * Get started * Code Coverage package documentation * this forum thread