Unit Testing

We will first look at unit testing REST APIs using JUnit, Mockito and Spring Test (also known as, MockMVC).

JUnit is a popular unit testing framework that allows you to test individual units of source code.
Mockito is a great mocking framework which provices data for JUnit tests.
@MockBean works well with the Mockito library.
@WebMvcTest is used for controller layer unit testing.

SOLUTION:

Controller