BAEL-628: Added sources for "Constructor Injection in Spring with Lombok" article. (#1064)

* BAEL-628: Added sources for "Constructor Injection in Spring with Lombok" article.

* BAEL-628: Removed unneccessary @Autowired + Apologizer example.

spring-core/README.md

@@ -3,3 +3,4 @@
 - [Exploring the Spring BeanFactory API](http://www.baeldung.com/spring-beanfactory)
 - [How to use the Spring FactoryBean?](http://www.baeldung.com/spring-factorybean)
 - [Constructor Dependency Injection in Spring](http://www.baeldung.com/constructor-injection-in-spring)
+- [Constructor Injection in Spring with Lombok](http://inprogress.baeldung.com/constructor-injection-in-spring-with-lombok)

spring-core/pom.xml

@@ -52,6 +52,11 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -131,6 +136,7 @@
         <junit.version>4.12</junit.version>
         <guava.version>20.0</guava.version>
         <maven-war-plugin.version>2.6</maven-war-plugin.version>
+        <lombok.version>1.16.12</lombok.version>
     </properties>
 
     <repositories>

spring-core/src/main/java/com/baeldung/lombok/Apologizer.java

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

spring-core/src/main/java/com/baeldung/lombok/Fareweller.java

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

spring-core/src/main/java/com/baeldung/lombok/Greeter.java

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

spring-core/src/main/java/com/baeldung/lombok/Thanker.java

@@ -0,0 +1,16 @@
+package com.baeldung.lombok;
+
+import lombok.AllArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+@AllArgsConstructor
+public class Thanker {
+
+    private final Translator translator;
+
+    public String thank() {
+        return translator.translate("thank you");
+    }
+}

spring-core/src/main/java/com/baeldung/lombok/Translator.java

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

spring-core/src/test/java/com/baeldung/lombok/ApologizerAutowiringTest.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 ApologizerAutowiringTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Autowired
+    private Apologizer apologizer;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void apologizeWithTranslatedMessage() {
+        when(translator.translate("sorry")).thenReturn(TRANSLATED);
+        assertEquals(TRANSLATED, apologizer.apologize());
+    }
+
+}

spring-core/src/test/java/com/baeldung/lombok/ApologizerTest.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 ApologizerTest {
+
+    private final static String MESSAGE = "MESSAGE";
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void apologizeWithCustomTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        Apologizer apologizer = new Apologizer(translator, MESSAGE);
+        when(translator.translate(MESSAGE)).thenReturn(TRANSLATED);
+        assertEquals(TRANSLATED, apologizer.apologize());
+    }
+}

spring-core/src/test/java/com/baeldung/lombok/FarewellAutowiringTest.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 FarewellAutowiringTest {
+
+    @Autowired
+    private Fareweller fareweller;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void sayByeWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("bye")).thenReturn(translated);
+        assertEquals(translated, fareweller.farewell());
+    }
+}

spring-core/src/test/java/com/baeldung/lombok/FarewellerTest.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 FarewellerTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void sayByeWithTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        when(translator.translate("bye")).thenReturn(TRANSLATED);
+        Fareweller fareweller = new Fareweller(translator);
+        assertEquals(TRANSLATED, fareweller.farewell());
+    }
+}

spring-core/src/test/java/com/baeldung/lombok/GreeterTest.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 GreeterTest {
+
+    @Autowired
+    private Greeter greeter;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void greetWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("hello")).thenReturn(translated);
+        assertEquals(translated, greeter.greet());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void throwWhenInstantiated() {
+        Greeter greeter = new Greeter();
+        greeter.greet();
+    }
+}

spring-core/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);
+    }
+}

spring-core/src/test/java/com/baeldung/lombok/ThankerAutowiringTest.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 ThankerAutowiringTest {
+
+    @Autowired
+    private Thanker thanker;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void thankWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("thank you")).thenReturn(translated);
+        assertEquals(translated, thanker.thank());
+    }
+}

spring-core/src/test/java/com/baeldung/lombok/ThankerTest.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 ThankerTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void thankWithTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        when(translator.translate("thank you")).thenReturn(TRANSLATED);
+        Thanker thanker = new Thanker(translator);
+        assertEquals(TRANSLATED, thanker.thank());
+    }
+}