For working with legacy systems I tend to start with Approval Tests (https://approvaltests.com/ https://approvaltests.com/). Because they don't require me to un

For working with legacy systems I tend to start with Approval Tests (https://approvaltests.com/ https://approvaltests.com/). Because they don't require me to understand the SUT very well before I can get started with them, and because they help me start to understand it more quickly.