Building Web Apps with Spring 5 and Angular

Introduction to unit testing

Unit testing is defined as testing a block of code in isolation. A class can have multiple methods. And, thus, there could be multiple unit tests for a class. The following are some of the best practices that need to be followed when working with unit tests:

• Refactor code: A method that is long and complex enough, or rather, does multiple things, or has multiple responsibilities that need to be refactored. In other words, a method with a very high cyclomatic complexity would need to be refactored to small methods that conform to the single responsibility principle (a block of code will have just one reason to change).
• Using test doubles: As the unit tests are about testing a block of code in isolation, any dependencies ...