https://jira.baeldung.com/browse/BAEL-7376

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/springjunitconfiguration/Person.java

@@ -0,0 +1,11 @@
+package com.baeldung.springjunitconfiguration;
+
+public class Person {
+
+    String name;
+
+    public Person(String name) {
+        this.name = name;
+    }
+
+}

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/springjunitconfiguration/SpringJUnitConfigIntegrationTest.java

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+package com.baeldung.springjunitconfiguration;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.junit.Assert.assertNotNull;
+
+/**
+ * @SpringJUnitConfig(SpringJUnitConfigTest.Config.class) is equivalent to:
+ * 
+ * @ExtendWith(SpringExtension.class)
+ * @ContextConfiguration(classes = SpringJUnitConfigTest.Config.class )
+ *
+ */
+@SpringJUnitConfig(SpringJUnitConfigIntegrationTest.Config.class)
+public class SpringJUnitConfigIntegrationTest {
+
+    @Configuration
+    static class Config {
+    }
+
+    @Autowired
+    private ApplicationContext applicationContext;
+
+    @Test
+    void givenAppContext_WhenInjected_ThenItShouldNotBeNull() {
+        assertNotNull(applicationContext);
+    }
+
+}

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/springjunitconfiguration/SpringJUnitConfigurationParameterizedTest.java

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+package com.baeldung.springjunitconfiguration;
+
+import java.util.List;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+
+@SpringJUnitConfig(classes = TestConfig.class , loader = AnnotationConfigContextLoader.class)
+public class SpringJUnitConfigurationParameterizedTest {
+
+    @ParameterizedTest
+    @ValueSource(strings = { "Dilbert", "Wally" })
+    void people(String name, @Autowired List<Person> people) {
+        assertThat(people.stream()
+          .map(Person::getName)
+          .filter(name::equals)).hasSize(1);
+    }
+}

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/springjunitconfiguration/SpringJUnitWebConfigIntegrationTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.springjunitconfiguration;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit.jupiter.web.SpringJUnitWebConfig;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.junit.Assert.assertNotNull;
+
+/**
+ * @SpringJUnitWebConfig(SpringJUnitWebConfigTest.Config.class) is equivalent to:
+ * 
+ * @ExtendWith(SpringExtension.class)
+ * @WebAppConfiguration
+ * @ContextConfiguration(classes = SpringJUnitWebConfigTest.Config.class )
+ *
+ */
+@SpringJUnitWebConfig(SpringJUnitWebConfigIntegrationTest.Config.class)
+public class SpringJUnitWebConfigIntegrationTest {
+
+    @Configuration
+    static class Config {
+    }
+
+    @Autowired
+    private WebApplicationContext webAppContext;
+
+    @Test
+    void givenWebAppContext_WhenInjected_ThenItShouldNotBeNull() {
+        assertNotNull(webAppContext);
+    }
+
+}

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/springjunitconfiguration/TestConfig.java

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+package com.baeldung.springjunitconfiguration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+@Configuration
+public class TestConfig {
+
+    @Bean
+    Person dilbert() {
+        return new Person("Dilbert");
+    }
+
+    @Bean
+    Person wally() {
+        return new Person("Wally");
+    }
+
+}