Spring Data

An application running in complete isolation is quite rare these days. Often, they integrate with other services to increase the value they deliver. When dealing with legacy applications, I often see the pattern of file transmission via FTP. Because the correct and stable integration of services can be an important part of business it should be tested properly.
In this blog post, I will show you how you can test the file transmission via FTP with MockFtpServer.

In my blog post ‘How to use Spring Data’s Specification’ I showed you how you can write automated tests for your Spring Data Specifications. Although it explained how you can test a single specification, it missed a crucial part. The testing of composite specifications. In this follow-up post, I will close the gap left last time.

The query methods of Spring Data JPA are a convenient way to retrieve data from your database. By simply defining methods in an interface, the framework can derive queries. For more complicated things, you can also define named queries and write your own JPQL or native SQL queries. However, with a growing application, this approach shows its drawbacks. New use-cases require new, but only slightly different, queries. The results are growing repositories that become harder and harder to maintain.
In this blog post, I’ll show you how to use Spring Data’s Specification to address this problem.

In this Blogpost, I will show you how to test the MongoDB-based data layer of your Spring Boot Application with @DataMongoTest. While having a look at an example, we will bootstrap some test data, use an embedded in-memory MongoDB and write an actual MongoDB test.

In this Blogpost, I will show you how to test the JPA-based data layer of your Spring Boot Application with @DataJpaTest. You will learn what happens when you use this annotation on a test class and a few ways to customize the default behavior. We will also have a look at an example where we will bootstrap some test data in different ways and write an actual JPA test.

In this blog post, I will give you an overview of Spring Boot’s capabilities to test the data layer of your application.
There is a vast amount of technologies to choose from when it comes to loading and persisting data. There are not only completely different types of data stores but also different ways to communicate with them. Which combination is the most fitting, depends on your application. Whatever you choose, you should consider testing the components communicating with your data store, to prevent working with the wrong data.
The @Data*Test annotations of Spring Boot offer a great way to test these components in isolation while providing some handy niceties to make your life easier.