I have been a contractor/consultant for the last 7 years. What I've seen when you try and go down that "write a test" path is. Oh there's a 2500 line stored pro

I have been a contractor/consultant for the last 7 years. What I've seen when you try and go down that "write a test" path is. Oh there's a 2500 line stored procedure with hardcoded network paths for production data in it. Or, this api only runs on the 2nd Tuesday of the Month but only after 8pm when the day of the month is also even. There's so much do-it-live embedded in the legacy systems it takes months to make enough seams to even test things in isolation outside of production. But, if you can get buy-in to make those changes, then exactly what you are talking about helps a ton.