Recently, when talking about testing Spring Boot applications at Spring IO and SpringOne Platform, I’ve mentioned <a href="https://www.testcontainers.org">Testcontainers and <a href="https://youtu.be/Wpz6b8ZEgcU?t=2077">discussed the boilerplate involved in configuring your tests to use the service running inside the container. I’m delighted to say that, with the <a href="https://spring.io/blog/2020/03/24/spring-framework-5-2-5-available-now">recent Spring Framework 5.2.5 release, that boilerplate is no more.
Prior to the changes that we’ve just released, your integration test would look similar to the following:
<code class="prettyprint">@SpringBootTest
@Testcontainers
@ContextConfiguration(initializers = ExampleIntegrationTests.Initializer.class)
class ExampleIntegrationTests {

   @Container
   static Neo4jContainer<?> neo4j = new Neo4jContainer<>();

   static class Initializer implements
           ApplicationContextInitializer {

       @Override
       public void initialize(Configura…