Course – LS (cat=Spring)

Get started with Spring 5 and Spring Boot 2, through the reference Learn Spring course:


1. Introduction

In this quick article, we’ll take a look at the new @SpringJUnitConfig and @SpringJUnitWebConfig annotations available in Spring 5.

These annotations are a composition of JUnit 5 and Spring 5 annotations that make test creation easier and faster.

2. @SpringJUnitConfig

@SpringJUnitConfig combines these 2 annotations:

  • @ExtendWith(SpringExtension.class) from JUnit 5 to run the test with the SpringExtension class and
  • @ContextConfiguration from Spring Testing to load the Spring context

Let’s create a test and use this annotation in practice:

public class SpringJUnitConfigIntegrationTest {

    static class Config {}

Notice that, in contrast to the @ContextConfiguration, configuration classes are declared using the value attribute. However, resource locations should be specified with the locations attribute.

We can now verify that the Spring context was really loaded:

private ApplicationContext applicationContext;

void givenAppContext_WhenInjected_ThenItShouldNotBeNull() {

Finally, here we have the equivalent code of @SpringJUnitConfig(SpringJUnitConfigTest.Config.class):

@ContextConfiguration(classes = SpringJUnitConfigTest.Config.class)

3. @SpringJUnitWebConfig

@SpringJUnitWebConfig combines the same annotations of @SpringJUnitConfig plus the @WebAppConfiguration from Spring testing – to load the WebApplicationContext.

Let’s see how this annotation works:

public class SpringJUnitWebConfigIntegrationTest {

    static class Config {

Like @SpringJUnitConfig, the configuration classes go in the value attribute and any resources are specified using the locations attribute.

Also, the value attribute of @WebAppConfiguration should now be specified using the resourcePath attribute. By default, this attribute is set to “src/main/webapp”.

Let’s now verify that the WebApplicationContext was really loaded:

private WebApplicationContext webAppContext;

void givenWebAppContext_WhenInjected_ThenItShouldNotBeNull() {

Again, here we have the equivalent code without using @SpringJUnitWebConfig:

@ContextConfiguration(classes = SpringJUnitWebConfigIntegrationTest.Config.class)

4. Conclusion

In this brief tutorial, we showed how to use the newly introduced @SpringJUnitConfig and @SpringJUnitWebConfig annotations in Spring 5.

The full source code for the examples is available over on GitHub.

Course – LS (cat=Spring)

Get started with Spring 5 and Spring Boot 2, through the Learn Spring course:

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