BAEL-4785 | Add scenarios to demonstrate the spring naming strategies

spring-core-5/src/test/java/com/baeldung/springbean/naming/SpringBeanNamingTest.java

@@ -0,0 +1,70 @@
+package com.baeldung.springbean.naming;
+
+import com.baeldung.springbean.naming.service.PetShow;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@ExtendWith(SpringExtension.class)
+public class SpringBeanNamingTest {
+
+    private AnnotationConfigApplicationContext context;
+
+    @BeforeEach
+    void setUp() {
+        context = new AnnotationConfigApplicationContext();
+        context.scan("com.baeldung.springbean.naming");
+        context.refresh();
+    }
+
+    //    To name a bean spring gets the class name and converts the first letter to lowercase. 
+    //    Default naming strategy of the spring bean which is using class level annotation
+
+    @Test
+    void givenLoggingServiceBeanIsCreated_whenThereIsNoValueProvided_thenBeanNameShouldBeDefaultName() {
+        assertNotNull(context.getBean("loggingService"));
+    }
+
+    //    In this case, to name a bean spring gets the class name and converts the first letter to lowercase.
+    @Test
+    void givenAuditServiceBeanIsCreatedWithMethodLevelAnnotation_whenThereIsNoValueProvided_thenBeanNameShouldBeTheNameOfMethod() {
+        assertNotNull(context.getBean("audit"));
+    }
+
+    //    To name a bean spring gets the class name and converts the first letter to lowercase.
+    //    Default naming strategy of the spring bean which is using class level annotation
+    @Test
+    void givenLoggingGatewayBeanIsCreatedWithFieldLevelAnnotation_whenThereIsNoValueProvided_thenBeanNameShouldBeDefaultName() {
+        assertNotNull(context.getBean("loggingGateway"));
+    }
+
+    //    spring will create the bean of type CustomComponent with the name "myBean".
+    //    As we're explicitly giving the name to the bean, spring will use this name to refer to it.
+    @Test
+    void givenCustomComponentBeanIsCreate_whenThereIsCustomNameGivenToBean_thenBeanShouldBeIdentifiedByThatName() {
+        assertNotNull(context.getBean("myBean"));
+    }
+
+    @Test
+    void givenCustomComponentBeanIsCreated_whenCustomNameIsGivenOnMethodLevelAnnotation_thenBeanShouldBeIdentifiedByThatName() {
+        assertNotNull(context.getBean("beanComponent"));
+        assertNotNull(context.getBean("configuration"));
+        assertNotNull(context.getBean("qualifierComponent"));
+    }
+
+    @Test
+    void givenMultipleImplementationsOfAnimal_whenFieldIsInjectedWithQualifiedName_thenTheSpecificBeanShouldGetInjected() {
+        PetShow petShow = (PetShow) context.getBean("petShow");
+
+        assertNotNull(context.getBean("cat"));
+        assertNotNull(context.getBean("dog"));
+
+        assertThat(petShow.getCat().name()).isEqualTo("Cat");
+        assertThat(petShow.getDog().name()).isEqualTo("Dog");
+    }
+}