The idea that every test should cover only one code change is absurd and a recipe for writing way more code than necessary. More code is more brittle and more d

The idea that every test should cover only one code change is absurd and a recipe for writing way more code than necessary. More code is more brittle and more difficult to change agile-y. Write enough tests to ensure things work, not to ensure every line of code is where you put it. That's folly and a waste of resources.