In this section, we're going to take a look at different test strategies for Java EE 8 web services. We'll talk about testing simple CDI components with plain unit tests and mocks, testing REST resources using the Jersey Test Framework, and we'll see how to do black box integration testing using the Test Containers framework.
So far, we've implemented our library service by offering a REST API for books, authors, and loans. We also implemented the library client. In this section, we'll talk about testing. You can see the test pyramid in the following diagram. At the bottom, there are unit tests. The middle layer is the service layer tests.
At the top level, you have UI layer tests. Unit testing in Java EE is really simple; you can use your standard test frameworks such as JUnit testing, and you may use Mojito or other mocking...