When individual program units are combined and tested as a group, then it is known as integration testing. The Spring Test context framework provides first-class support for an integration test of a Spring-based application. We have defined lots of Spring managed beans in our web application context, such as services, repositories, view resolvers, and more, to run our application.
These managed beans are instantiated during the startup of an application by the Spring framework. While doing the integration testing, our test environment must also have those beans to test our application successfully. The Spring Test context framework gives us the ability to define a test context that is similar to the web application context. Let's see how to incorporate the Spring Test context to test our ProductValidator class.