Answers

1. Unit testing is done to test the smallest code unit, such as a method, whereas integration testing is performed where either different layers or multiple modules are involved. In this chapter, integration testing has been performed for the entire application, which involves all the layers of the application, including the database, whereas unit testing has been performed class-wise for each of the methods. In the context of this chapter, unit testing is white-box testing, whereas API integration testing is a kind of black-box testing because you verify the API’s functional requirement.
2. Having separate unit and integration tests (and including their source location) allows you to manage tests easily. You can also have a configurable build setup that will perform unit testing during development or on demand because unit tests are faster. You can run only unit tests by using the gradlew clean build –x integrationTest command, whereas on merge request builds...