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Spring Boot - Using @TestConfiguration In static nested class

[Updated: Apr 18, 2020, Created: Apr 18, 2020]

In last example we saw how to use @TestConfiguration to define beans for test classes. Following example shows how to use @TestConfiguration in a static nested class. In that case we don't have to import it explicitly in enclosing class.

Example

Spring Boot example project

@Component
public class MyHelloProcessor {
  @Autowired
  private HelloService helloService;

  public String sayHi(String name) {
      return helloService.getMessage(name);
  }
}
public interface HelloService {
  String getMessage(String name);
}
@Service
public class HelloServiceImpl implements HelloService {
  public String getMessage(String name) {
      return String.format("Hi there, %s.", name);
  }
}
package com.logicbig.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class AppMain {
  public static void main(String[] args) {
      ConfigurableApplicationContext context =
              SpringApplication.run(AppMain.class, args);
      MyHelloProcessor bean = context.getBean(MyHelloProcessor.class);
      String msg = bean.sayHi("Joe");
      System.out.println(msg);
  }
}

. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.5.RELEASE)

2020-04-18 02:01:44.885 INFO 2304 --- [ main] com.logicbig.example.AppMain : Starting AppMain on DESKTOP-VCSEKL5 with PID 2304 (D:\example-projects\spring-boot\unit-testing\spring-boot-nested-test-configuration-class\target\classes started by Joe in d:\example-projects\spring-boot\unit-testing\spring-boot-nested-test-configuration-class)
2020-04-18 02:01:44.889 INFO 2304 --- [ main] com.logicbig.example.AppMain : No active profile set, falling back to default profiles: default
2020-04-18 02:01:45.541 INFO 2304 --- [ main] com.logicbig.example.AppMain : Started AppMain in 1.084 seconds (JVM running for 1.617)
Hi there, Joe.

Using @TestConfiguration in nested class

package com.logicbig.example;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.context.TestConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class MyHelloProcessorTest {
    @Autowired
    private MyHelloProcessor myHelloProcessor;

    @Test
    public void testSayHi() {
        String message = myHelloProcessor.sayHi("Joe");
        System.out.println(message);
        Assert.assertEquals(message, "Test hello: Joe");
    }

    @TestConfiguration
    static class MyTestConfig {
        @Bean
        public HelloService helloService() {
            return new HelloService() {
                @Override
                public String getMessage(String name) {
                    return "Test hello: " + name;
                }
            };
        }
    }
}
D:\spring-boot-nested-test-configuration-class>mvn test -Dtest=MyHelloProcessorTest.java
[INFO] Scanning for projects...
[INFO]
[INFO] --< com.logicbig.example:spring-boot-nested-test-configuration-class >--
[INFO] Building spring-boot-nested-test-configuration-class 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ spring-boot-nested-test-configuration-class ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ spring-boot-nested-test-configuration-class ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ spring-boot-nested-test-configuration-class ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ spring-boot-nested-test-configuration-class ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ spring-boot-nested-test-configuration-class ---
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
02:19:08.118 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class com.logicbig.example.MyHelloProcessorTest]
02:19:08.124 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
02:19:08.140 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
02:19:08.213 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.logicbig.example.MyHelloProcessorTest] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
02:19:08.245 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.logicbig.example.MyHelloProcessorTest], using SpringBootContextLoader
02:19:08.252 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest]: class path resource [com/logicbig/example/MyHelloProcessorTest-context.xml] does not exist
02:19:08.253 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest]: class path resource [com/logicbig/example/MyHelloProcessorTestContext.groovy] does not exist
02:19:08.253 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.logicbig.example.MyHelloProcessorTest]: no resource found for suffixes {-context.xml, Context.groovy}.
02:19:08.329 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.416 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.logicbig.example.AppMain for test class com.logicbig.example.MyHelloProcessorTest
02:19:08.529 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [com.logicbig.example.MyHelloProcessorTest]: using defaults.
02:19:08.530 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
02:19:08.546 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [javax/servlet/ServletContext]
02:19:08.550 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
02:19:08.552 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
02:19:08.553 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@36804139, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@20bd8be5, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@730d2164, org.springframework.test.context.support.DirtiesContextTestExecutionListener@24959ca4, org.springframework.test.context.event.EventPublishingTestExecutionListener@10289886, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@5c86dbc5, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@461ad730, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@4ee203eb, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@1a5a4e19, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@7068e664]
02:19:08.568 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.570 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.640 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class com.logicbig.example.MyHelloProcessorTest]
02:19:08.640 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
02:19:08.641 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
02:19:08.643 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.logicbig.example.MyHelloProcessorTest] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
02:19:08.645 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.logicbig.example.MyHelloProcessorTest], using SpringBootContextLoader
02:19:08.652 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest]: class path resource [com/logicbig/example/MyHelloProcessorTest-context.xml] does not exist
02:19:08.653 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest]: class path resource [com/logicbig/example/MyHelloProcessorTestContext.groovy] does not exist
02:19:08.654 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.logicbig.example.MyHelloProcessorTest]: no resource found for suffixes {-context.xml, Context.groovy}.
02:19:08.657 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.659 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.logicbig.example.AppMain for test class com.logicbig.example.MyHelloProcessorTest
02:19:08.663 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [com.logicbig.example.MyHelloProcessorTest]: using defaults.
02:19:08.664 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
02:19:08.665 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [javax/servlet/ServletContext]
02:19:08.666 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
02:19:08.667 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
02:19:08.668 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@2663e964, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@48b67364, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@189cbd7c, org.springframework.test.context.support.DirtiesContextTestExecutionListener@7bf3a5d8, org.springframework.test.context.event.EventPublishingTestExecutionListener@42e25b0b, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@39b43d60, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@44be0077, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@2205a05d, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@72ef8d15, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@6aa8e115]
02:19:08.668 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.669 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.726 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.726 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest]
[INFO] Running com.logicbig.example.MyHelloProcessorTest
02:19:08.726 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.726 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.726 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.726 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.744 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@38604b81 testClass = MyHelloProcessorTest, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@1e44b638 testClass = MyHelloProcessorTest, locations = '{}', classes = '{class com.logicbig.example.AppMain, class com.logicbig.example.MyHelloProcessorTest$MyTestConfig}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@702657cc, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@6025e1b6, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@77c2494c, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@2aceadd4], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null].
02:19:08.752 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.752 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest]
02:19:08.758 [main] DEBUG org.springframework.test.context.support.DependencyInjectionTestExecutionListener - Performing dependency injection for test context [[DefaultTestContext@38604b81 testClass = MyHelloProcessorTest, testInstance = com.logicbig.example.MyHelloProcessorTest@1efe439d, testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@1e44b638 testClass = MyHelloProcessorTest, locations = '{}', classes = '{class com.logicbig.example.AppMain, class com.logicbig.example.MyHelloProcessorTest$MyTestConfig}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@702657cc, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@6025e1b6, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@77c2494c, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@2aceadd4], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]].
02:19:08.787 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=-1}

. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.5.RELEASE)

2020-04-18 02:19:09.066 INFO 8940 --- [ main] c.logicbig.example.MyHelloProcessorTest : No active profile set, falling back to default profiles: default
2020-04-18 02:19:09.774 INFO 8940 --- [ main] c.logicbig.example.MyHelloProcessorTest : Started MyHelloProcessorTest in 0.984 seconds (JVM running for 2.549)
Test hello: Joe
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.59 s - in com.logicbig.example.MyHelloProcessorTest
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.974 s
[INFO] Finished at: 2020-04-18T02:19:10-05:00
[INFO] ------------------------------------------------------------------------

Another test class without @TestConfiguration

package com.logicbig.example;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class MyHelloProcessorTest2 {
    @Autowired
    private MyHelloProcessor myHelloProcessor;

    @Test
    public void testSayHi() {
        String message = myHelloProcessor.sayHi("Joe");
        System.out.println(message);
        Assert.assertEquals(message, "Hi there, Joe.");
    }
}
D:\spring-boot-nested-test-configuration-class>mvn test -Dtest=MyHelloProcessorTest2.java
[INFO] Scanning for projects...
[INFO]
[INFO] --< com.logicbig.example:spring-boot-nested-test-configuration-class >--
[INFO] Building spring-boot-nested-test-configuration-class 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ spring-boot-nested-test-configuration-class ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ spring-boot-nested-test-configuration-class ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ spring-boot-nested-test-configuration-class ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ spring-boot-nested-test-configuration-class ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ spring-boot-nested-test-configuration-class ---
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
02:17:33.586 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class com.logicbig.example.MyHelloProcessorTest2]
02:17:33.592 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
02:17:33.607 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
02:17:33.663 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.logicbig.example.MyHelloProcessorTest2] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
02:17:33.693 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.logicbig.example.MyHelloProcessorTest2], using SpringBootContextLoader
02:17:33.701 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest2]: class path resource [com/logicbig/example/MyHelloProcessorTest2-context.xml] does not exist
02:17:33.702 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest2]: class path resource [com/logicbig/example/MyHelloProcessorTest2Context.groovy] does not exist
02:17:33.702 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.logicbig.example.MyHelloProcessorTest2]: no resource found for suffixes {-context.xml, Context.groovy}.
02:17:33.703 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.logicbig.example.MyHelloProcessorTest2]: MyHelloProcessorTest2 does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
02:17:33.757 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.logicbig.example.MyHelloProcessorTest2]
02:17:33.859 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.logicbig.example.AppMain for test class com.logicbig.example.MyHelloProcessorTest2
02:17:33.972 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [com.logicbig.example.MyHelloProcessorTest2]: using defaults.
02:17:33.974 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
02:17:33.991 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [javax/servlet/ServletContext]
02:17:33.996 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
02:17:33.997 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
02:17:33.998 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@3bcd05cb, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@3b6d844d, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@36804139, org.springframework.test.context.support.DirtiesContextTestExecutionListener@20bd8be5, org.springframework.test.context.event.EventPublishingTestExecutionListener@730d2164, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@24959ca4, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@10289886, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@5c86dbc5, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@461ad730, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@4ee203eb]
02:17:34.030 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.045 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.105 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class com.logicbig.example.MyHelloProcessorTest2]
02:17:34.105 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
02:17:34.106 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
02:17:34.107 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.logicbig.example.MyHelloProcessorTest2] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
02:17:34.108 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.logicbig.example.MyHelloProcessorTest2], using SpringBootContextLoader
02:17:34.109 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest2]: class path resource [com/logicbig/example/MyHelloProcessorTest2-context.xml] does not exist
02:17:34.110 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.logicbig.example.MyHelloProcessorTest2]: class path resource [com/logicbig/example/MyHelloProcessorTest2Context.groovy] does not exist
02:17:34.110 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.logicbig.example.MyHelloProcessorTest2]: no resource found for suffixes {-context.xml, Context.groovy}.
02:17:34.111 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.logicbig.example.MyHelloProcessorTest2]: MyHelloProcessorTest2 does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
02:17:34.116 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.117 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.logicbig.example.AppMain for test class com.logicbig.example.MyHelloProcessorTest2
02:17:34.122 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [com.logicbig.example.MyHelloProcessorTest2]: using defaults.
02:17:34.123 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
02:17:34.125 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [javax/servlet/ServletContext]
02:17:34.128 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
02:17:34.131 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
02:17:34.132 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@6dd7b5a3, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@6f3187b0, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@2663e964, org.springframework.test.context.support.DirtiesContextTestExecutionListener@48b67364, org.springframework.test.context.event.EventPublishingTestExecutionListener@189cbd7c, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@7bf3a5d8, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@42e25b0b, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@39b43d60, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@44be0077, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@2205a05d]
02:17:34.132 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.133 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.212 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.212 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest2]
[INFO] Running com.logicbig.example.MyHelloProcessorTest2
02:17:34.215 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.215 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.216 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.216 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.226 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@44d52de2 testClass = MyHelloProcessorTest2, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@95e33cc testClass = MyHelloProcessorTest2, locations = '{}', classes = '{class com.logicbig.example.AppMain}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@3754a4bf, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@175c2241, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@815b41f, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@3857f613], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null].
02:17:34.232 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.233 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.logicbig.example.MyHelloProcessorTest2]
02:17:34.241 [main] DEBUG org.springframework.test.context.support.DependencyInjectionTestExecutionListener - Performing dependency injection for test context [[DefaultTestContext@44d52de2 testClass = MyHelloProcessorTest2, testInstance = com.logicbig.example.MyHelloProcessorTest2@46b61c56, testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@95e33cc testClass = MyHelloProcessorTest2, locations = '{}', classes = '{class com.logicbig.example.AppMain}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@3754a4bf, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@175c2241, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@815b41f, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@3857f613], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]].
02:17:34.289 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=-1}

. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.5.RELEASE)

2020-04-18 02:17:34.572 INFO 16476 --- [ main] c.l.example.MyHelloProcessorTest2 : No active profile set, falling back to default profiles: default
2020-04-18 02:17:35.256 INFO 16476 --- [ main] c.l.example.MyHelloProcessorTest2 : Started MyHelloProcessorTest2 in 0.963 seconds (JVM running for 2.479)
Hi there, Joe.
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.649 s - in com.logicbig.example.MyHelloProcessorTest2
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.340 s
[INFO] Finished at: 2020-04-18T02:17:36-05:00
[INFO] ------------------------------------------------------------------------

Example Project

Dependencies and Technologies Used:

  • Spring Boot 2.2.5.RELEASE
  • spring-boot-starter-test : Starter for testing Spring Boot applications with libraries including JUnit, Hamcrest and Mockito.
  • JDK 1.8
  • Maven 3.5.4

Spring Boot - @TestConfiguration in a nested class Select All Download
  • spring-boot-nested-test-configuration-class
    • src
      • main
        • java
          • com
            • logicbig
              • example
      • test
        • java
          • com
            • logicbig
              • example
                • MyHelloProcessorTest.java

    See Also