This is how I will use Data class to return multiple values from a method:

Brutal & simple 🙂💪

Yeah. Just shared how it feels for me ;)

I will write tests that will cover code in make_second_letter_upcase, pick_letter & replace_letter, calling only public method - make_second_letter_upcase. Testing replace_letter & pick_letter separately is useless & weird.

Testing private methods is an anti-pattern for me. If developer trying to test private method - means that he can’t find conditions to test class from the public perspective. He just don’t understand how the class works or this private method with its logic is not needed & this code never executes.

Celebrate freedom!

Same. Found this site couple of weeks ago. Very useful! 🔥