Refactoring

Before refactoring

• Check the test coverage. If not sufficient, add more

• Tests should pass before attempting to refactor

• Ensure public access points/interfaces are well tested

• Depending on the refactoring level, ensure some of the lower level aspects are tested as well

Refactoring techniques

https://refactoring.guru/refactoring/techniques

Abstract

• Encapsulate fields

• Type checking/ cases => polymorphism

Break-up code

• Large method => smaller multiple methods

• Large class => smaller classes with limited responsibility

Improve naming and location

• Hard constant value => variable with a constant value. Gives a better name and allows searchability