Unable to find a @SpringBootConfiguration when doing a JpaTest

"Unable to find a @SpringBootConfiguration" error when doing a JpaTest 🤔

So, you're trying to run a simple JUnit test to check if your CrudRepositories are working fine. But you keep getting this pesky error:

Unable to find a @SpringBootConfiguration, you need to use @ContextConfiguration or @SpringBootTest(classes=...) with your test
java.lang.IllegalStateException

And you're wondering, doesn't Spring Boot configure itself? 🧐

Understanding the Issue

The error message is quite explicit. It's saying that it couldn't find a @SpringBootConfiguration annotation. This annotation is used to signal Spring Boot to configure itself for the test.

The Solution

To fix this issue, you need to make a small modification to your test class. Update your JpaTest class with the following changes:

@RunWith(SpringRunner.class)
@DataJpaTest
@ContextConfiguration(classes = Application.class)       // Add this line
public class JpaTest {
    // ...
}

By adding @ContextConfiguration(classes = Application.class), you're explicitly telling Spring Boot to use the Application class to configure itself.

Why This Solution Works

The @ContextConfiguration annotation allows you to specify the configuration class for your test. In this case, we instructed Spring Boot to use the Application class to configure the test environment.

Wrapping Up

Now you should be able to run your JpaTest without any issues! 🎉

But keep in mind that this solution assumes your Application class is properly configured. Make sure you have the necessary annotations like @SpringBootApplication, @EnableJpaRepositories, and @ComponentScan in your Application class.

If you're still facing any problems, don't hesitate to leave a comment below or reach out to the Spring Boot community for further assistance.

Happy testing! 💪

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