I strongly disagree for the reasons listed in the article; it induces the construction and testing of abstractions which exist solely to enable testing, and do not enable simpler reasoning.
Refactoring is even worse. Refactoring after you've split something up into multiple parts and tested their interfaces in isolation is far more work. Any refactoring worth a damn changes the boundaries of abstractions. I frequently find myself throwing away all the unit tests after a significant refactoring; only integration tests outside the blast radius of the refactoring survive.
Refactoring is even worse. Refactoring after you've split something up into multiple parts and tested their interfaces in isolation is far more work. Any refactoring worth a damn changes the boundaries of abstractions. I frequently find myself throwing away all the unit tests after a significant refactoring; only integration tests outside the blast radius of the refactoring survive.