JAVA-19554 Move Constructor Injection in Spring with Lombok article from spring-core-4 module to lombok-2 module (#13758)

lombok-modules/lombok-2/README.md

@@ -9,4 +9,5 @@ This module contains articles about Project Lombok.
 - [Lombok Using @With Annotations](https://www.baeldung.com/lombok-with-annotations)
 - [Lombok’s @ToString Annotation](https://www.baeldung.com/lombok-tostring)
 - [Jackson’s Deserialization With Lombok](https://www.baeldung.com/java-jackson-deserialization-lombok)
+- [Constructor Injection in Spring with Lombok](https://www.baeldung.com/spring-injection-lombok)
 - More articles: [[<-- prev]](../lombok)

lombok-modules/lombok-2/pom.xml

@@ -25,6 +25,10 @@
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
+         <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
     </dependencies>
 
 </project>

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/ApologizeService.java

@@ -0,0 +1,22 @@
+package com.baeldung.lombok;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class ApologizeService {
+
+    private final Translator translator;
+    private final String message;
+
+    @Autowired
+    public ApologizeService(Translator translator) {
+        this(translator, "sorry");
+    }
+
+    public String apologize() {
+        return translator.translate(message);
+    }
+}

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/FarewellService.java

@@ -0,0 +1,18 @@
+package com.baeldung.lombok;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class FarewellService {
+
+    private final Translator translator;
+
+    public FarewellService(Translator translator) {
+        this.translator = translator;
+    }
+
+    public String farewell() {
+        return translator.translate("bye");
+    }
+}

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/GreetingService.java

@@ -0,0 +1,15 @@
+package com.baeldung.lombok;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class GreetingService {
+
+    @Autowired
+    private Translator translator;
+
+    public String greet() {
+        return translator.translate("hello");
+    }
+}

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/ThankingService.java

@@ -0,0 +1,15 @@
+package com.baeldung.lombok;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class ThankingService {
+
+    private final Translator translator;
+
+    public String thank() {
+        return translator.translate("thank you");
+    }
+}

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/Translator.java

@@ -0,0 +1,5 @@
+package com.baeldung.lombok;
+
+public interface Translator {
+    String translate(String input);
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/ApologizeServiceAutowiringIntegrationTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class ApologizeServiceAutowiringIntegrationTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Autowired
+    private ApologizeService apologizeService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void apologizeWithTranslatedMessage() {
+        when(translator.translate("sorry")).thenReturn(TRANSLATED);
+        assertEquals(TRANSLATED, apologizeService.apologize());
+    }
+
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/ApologizeServiceIntegrationTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class ApologizeServiceIntegrationTest {
+
+    private final static String MESSAGE = "MESSAGE";
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void apologizeWithCustomTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        ApologizeService apologizeService = new ApologizeService(translator, MESSAGE);
+        when(translator.translate(MESSAGE)).thenReturn(TRANSLATED);
+        assertEquals(TRANSLATED, apologizeService.apologize());
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/FarewellAutowiringIntegrationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class FarewellAutowiringIntegrationTest {
+
+    @Autowired
+    private FarewellService farewellService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void sayByeWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("bye")).thenReturn(translated);
+        assertEquals(translated, farewellService.farewell());
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/FarewellServiceIntegrationTest.java

@@ -0,0 +1,20 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class FarewellServiceIntegrationTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void sayByeWithTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        when(translator.translate("bye")).thenReturn(TRANSLATED);
+        FarewellService farewellService = new FarewellService(translator);
+        assertEquals(TRANSLATED, farewellService.farewell());
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/GreetingServiceIntegrationTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class GreetingServiceIntegrationTest {
+
+    @Autowired
+    private GreetingService greetingService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void greetWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("hello")).thenReturn(translated);
+        assertEquals(translated, greetingService.greet());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void throwWhenInstantiated() {
+        GreetingService greetingService = new GreetingService();
+        greetingService.greet();
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/TestConfig.java

@@ -0,0 +1,17 @@
+package com.baeldung.lombok;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+import static org.mockito.Mockito.mock;
+
+@Configuration
+@ComponentScan("com.baeldung.lombok")
+class TestConfig {
+
+    @Bean
+    public Translator mockTranslator() {
+        return mock(Translator.class);
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/ThankingServiceAutowiringIntegrationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class ThankingServiceAutowiringIntegrationTest {
+
+    @Autowired
+    private ThankingService thankingService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void thankWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("thank you")).thenReturn(translated);
+        assertEquals(translated, thankingService.thank());
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/ThankingServiceIntegrationTest.java

@@ -0,0 +1,20 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class ThankingServiceIntegrationTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void thankWithTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        when(translator.translate("thank you")).thenReturn(TRANSLATED);
+        ThankingService thankingService = new ThankingService(translator);
+        assertEquals(TRANSLATED, thankingService.thank());
+    }
+}