Do they hinder refactoring or rewriting? When I am doing legitimate refactoring in simple steps by the book, unit tests are helpful and speed it up. When I am

Do they hinder refactoring or rewriting? When I am doing legitimate refactoring in simple steps by the book, unit tests are helpful and speed it up. When I am rewriting, I see your issue. For example, a sprout method or sprout class refactor do not change the tests.