Spring Import Annotation - initial commit (#9424)

GilvanOrnelas · Gilvan Ornelas Fernandes Filho · web-flow · commit aa5551bd9ba0 · 2020-06-07T17:18:58.000-05:00
Co-authored-by: Gilvan Ornelas Fernandes Filho &lt;gilvan.fernandes@bairesdev.com&gt;
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/AnimalConfiguration.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/AnimalConfiguration.java
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import({ MammalConfiguration.class, BirdConfig.class })
+class AnimalConfiguration {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/AnimalScanConfiguration.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/AnimalScanConfiguration.java
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan
+public class AnimalScanConfiguration {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Bird.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Bird.java
@@ -0,0 +1,4 @@
+package com.baeldung.importannotation.animal;
+
+class Bird {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/BirdConfig.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/BirdConfig.java
@@ -0,0 +1,13 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class BirdConfig {
+
+    @Bean
+    Bird bird() {
+        return new Bird();
+    }
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Bug.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Bug.java
@@ -0,0 +1,7 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.stereotype.Component;
+
+@Component(value = "bug")
+class Bug {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/BugConfig.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/BugConfig.java
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import(Bug.class)
+class BugConfig {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Cat.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Cat.java
@@ -0,0 +1,4 @@
+package com.baeldung.importannotation.animal;
+
+class Cat {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/CatConfig.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/CatConfig.java
@@ -0,0 +1,13 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class CatConfig {
+
+    @Bean
+    Cat cat() {
+        return new Cat();
+    }
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Dog.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/Dog.java
@@ -0,0 +1,4 @@
+package com.baeldung.importannotation.animal;
+
+class Dog {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/DogConfig.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/DogConfig.java
@@ -0,0 +1,13 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class DogConfig {
+
+    @Bean
+    Dog dog() {
+        return new Dog();
+    }
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/animal/MammalConfiguration.java b/spring-core-4/src/main/java/com/baeldung/importannotation/animal/MammalConfiguration.java
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import({ DogConfig.class, CatConfig.class })
+class MammalConfiguration {
+}
diff --git a/spring-core-4/src/main/java/com/baeldung/importannotation/zoo/ZooApplication.java b/spring-core-4/src/main/java/com/baeldung/importannotation/zoo/ZooApplication.java
@@ -0,0 +1,11 @@
+package com.baeldung.importannotation.zoo;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+import com.baeldung.importannotation.animal.AnimalScanConfiguration;
+
+@Configuration
+@Import(AnimalScanConfiguration.class)
+class ZooApplication {
+}
diff --git a/spring-core-4/src/test/java/com/baeldung/importannotation/animal/AnimalConfigUnitTest.java b/spring-core-4/src/test/java/com/baeldung/importannotation/animal/AnimalConfigUnitTest.java
@@ -0,0 +1,31 @@
+package com.baeldung.importannotation.animal;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = { AnimalConfiguration.class })
+class AnimalConfigUnitTest {
+
+    @Autowired
+    ApplicationContext context;
+
+    @Test
+    void givenImportedBeans_whenGettingEach_shallFindOnlyTheImportedBeans() {
+        assertThatBeanExists("dog", Dog.class);
+        assertThatBeanExists("cat", Cat.class);
+        assertThatBeanExists("bird", Cat.class);
+    }
+
+    private void assertThatBeanExists(String beanName, Class<?> beanClass) {
+        assertTrue(context.containsBean(beanName));
+        assertNotNull(context.getBean(beanClass));
+    }
+}
diff --git a/spring-core-4/src/test/java/com/baeldung/importannotation/animal/BugConfigUnitTest.java b/spring-core-4/src/test/java/com/baeldung/importannotation/animal/BugConfigUnitTest.java
@@ -0,0 +1,25 @@
+package com.baeldung.importannotation.animal;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = BugConfig.class)
+class BugConfigUnitTest {
+
+    @Autowired
+    ApplicationContext context;
+
+    @Test
+    void givenImportInComponent_whenLookForBean_shallFindIt() {
+        assertTrue(context.containsBean("bug"));
+        assertNotNull(context.getBean(Bug.class));
+    }
+}
diff --git a/spring-core-4/src/test/java/com/baeldung/importannotation/animal/ConfigUnitTest.java b/spring-core-4/src/test/java/com/baeldung/importannotation/animal/ConfigUnitTest.java
@@ -0,0 +1,31 @@
+package com.baeldung.importannotation.animal;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = { BirdConfig.class, CatConfig.class, DogConfig.class })
+class ConfigUnitTest {
+
+    @Autowired
+    ApplicationContext context;
+
+    @Test
+    void givenImportedBeans_whenGettingEach_shallFindIt() {
+        assertThatBeanExists("dog", Dog.class);
+        assertThatBeanExists("cat", Cat.class);
+        assertThatBeanExists("bird", Bird.class);
+    }
+
+    private void assertThatBeanExists(String beanName, Class<?> beanClass) {
+        assertTrue(context.containsBean(beanName));
+        assertNotNull(context.getBean(beanClass));
+    }
+}
diff --git a/spring-core-4/src/test/java/com/baeldung/importannotation/animal/MammalConfigUnitTest.java b/spring-core-4/src/test/java/com/baeldung/importannotation/animal/MammalConfigUnitTest.java
@@ -0,0 +1,33 @@
+package com.baeldung.importannotation.animal;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = { MammalConfiguration.class })
+class MammalConfigUnitTest {
+
+    @Autowired
+    ApplicationContext context;
+
+    @Test
+    void givenImportedBeans_whenGettingEach_shallFindOnlyTheImportedBeans() {
+        assertThatBeanExists("dog", Dog.class);
+        assertThatBeanExists("cat", Cat.class);
+
+        assertFalse(context.containsBean("bird"));
+    }
+
+    private void assertThatBeanExists(String beanName, Class<?> beanClass) {
+        assertTrue(context.containsBean(beanName));
+        assertNotNull(context.getBean(beanClass));
+    }
+}
diff --git a/spring-core-4/src/test/java/com/baeldung/importannotation/zoo/ZooApplicationUnitTest.java b/spring-core-4/src/test/java/com/baeldung/importannotation/zoo/ZooApplicationUnitTest.java
@@ -0,0 +1,26 @@
+package com.baeldung.importannotation.zoo;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = ZooApplication.class)
+class ZooApplicationUnitTest {
+
+    @Autowired
+    ApplicationContext context;
+
+    @Test
+    void givenTheScanInTheAnimalPackage_whenGettingAnyAnimal_shallFindItInTheContext() {
+        assertNotNull(context.getBean("dog"));
+        assertNotNull(context.getBean("bird"));
+        assertNotNull(context.getBean("cat"));
+        assertNotNull(context.getBean("bug"));
+    }
+}

-Original file line number
+Diff line change
@@ @@ -0,0 +1,4 @@ @@
 +package com.baeldung.importannotation.animal;
++
 +class Bird {
 +}