JUnit tests for the Spring Boot application

Spring Boot provides two modules for test support—sprint-boot-test and spring-boot-test-autoconfigure. spring-boot-test contains core items, and spring-boot-test-autoconfigure supports auto-configuration for tests. These modules have a number of utilities and annotations to help when testing your application. It is very simple to add these modules in the Spring Boot application by adding the spring-boot-starter-test starter dependency in your Maven file. This starter imports both Spring Boot test modules as well as JUnit, AssertJ, Hamcrest, and a number of other useful libraries. Let's see the following Maven dependency to include test support in the Spring Boot application:

<dependency> 
   <groupId>org.springframework.boot</groupId> 
   <artifactId>spring-boot-starter-test</artifactId> 
   <scope>test</scope> 
</dependency> 

The preceding Maven dependency will add the following libraries to your Spring...