MongoDB is one of the NoSQL databases that Spring Boot offers great testing support for. Like all other test slice annotations from Spring Boot, when using @DataMongoTest, we'll
MongoDB Testcontainers Setup for @DataMongoTest
Use GreenMail For Spring Mail (JavaMailSender) JUnit 5 Integration Tests
Philip Riecks
Sending emails is a common responsibility of enterprise applications. With the Spring Boot Starter Mail dependency, this becomes a trivial task. But how can we write integration tests
How to Test Java HTTP Client Usages (e.g. OkHttp, Apache HttpClient)
Philip Riecks
Fetching data via HTTP from a remote system is a task almost every application has to solve. Fortunately, there are mature Java HTTP client libraries available that are
Override Spring Boot Configuration Properties For Tests
Philip Riecks
As a general best practice, we should externalize configuration values for our applications. This allows overriding them per stage and e.g. connect to a PayPal test instance for
Fix No Qualifying Spring Bean Error For Spring Boot Tests
Philip Riecks
When working for the first time with Spring, you might encounter several no qualifying bean exceptions when you try to start your application. The stack trace is quite
Spring Data JPA Persistence Layer Tests With @DataJpaTest
Philip Riecks
Similar to testing our web layer in isolation with @WebMvcTest, Spring Boot provides a convenient way to test our Spring Boot JPA persistence layer. Using the @DataJpaTest test
Test Your Spring MVC Controller with the WebTestClient and MockMvc
Philip Riecks
Starting with Spring Framework version 5.3 (part of Spring Boot since version 2.4.0) you can perform requests with the WebTestClient against MockMvc. This allows unifying the way you
@Mock vs. @MockBean When Testing Spring Boot Applications
Philip Riecks
When you start testing your Spring Boot application sooner or later you'll stumble over @Mock and @MockBean. Both annotations create mock objects but with a slightly different purpose.
Write Concise Web Tests With Selenide and Testcontainers
Philip Riecks
Good old web tests – extremely valuable, sometimes hard to maintain, and annoying once they get flaky. If you are familiar with Selenium, you might find your self-writing
Mocking Static Methods with Mockito (Java & Kotlin)
Philip Riecks
Want to start a religious discussion? Start asking your teammates whether or not you should mock static method calls. It's debatable if this is an absolute no-go or
