BAEL-6498 RequiredArgsConstructor Code and Tests (#14281)

* BAEL-6498 RequiredArgsConstructor Code and Tests

* BAEL-6498 RequiredArgsConstructor Code and Tests

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/requiredargsconstructor/ClassWithFinalMembers.java

@@ -0,0 +1,13 @@
+package com.baeldung.lombok.requiredargsconstructor;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class ClassWithFinalMembers {
+
+    private final String stringObject;
+
+    public String getStringObject() {
+        return stringObject;
+    }
+}

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/requiredargsconstructor/ClassWithFinalNonNullMembers.java

@@ -0,0 +1,26 @@
+package com.baeldung.lombok.requiredargsconstructor;
+
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class ClassWithFinalNonNullMembers {
+
+    private final String finalStringObject;
+    @NonNull
+    private String nonNullStringObject;
+
+    private String nonFinalStringObject;
+
+    public String getFinalStringObject() {
+        return finalStringObject;
+    }
+
+    public String getNonNullStringObject() {
+        return nonNullStringObject;
+    }
+
+    public String getNonFinalStringObject() {
+        return nonFinalStringObject;
+    }
+}

lombok-modules/lombok-2/src/main/java/com/baeldung/lombok/requiredargsconstructor/ClassWithNonFinalMembers.java

@@ -0,0 +1,13 @@
+package com.baeldung.lombok.requiredargsconstructor;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class ClassWithNonFinalMembers {
+
+    private String stringObject;
+
+    public String getStringObject() {
+        return stringObject;
+    }
+}

lombok-modules/lombok-2/src/test/java/com/baeldung/lombok/requiredargsconstructor/RequiredArgsConstructorUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.lombok.requiredargsconstructor;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class RequiredArgsConstructorUnitTest {
+    @Test
+    void whenClassHasFinalMembers_thenGeneratedConstructorHasParameters() {
+        ClassWithFinalMembers classWithFinalMembers = new ClassWithFinalMembers("dummyString");
+        Assertions.assertNotNull(classWithFinalMembers);
+        Assertions.assertEquals("dummyString", classWithFinalMembers.getStringObject());
+    }
+
+    @Test
+    void whenClassHasNonFinalMembers_thenGeneratedConstructorHasNoParameters() {
+        ClassWithNonFinalMembers classWithNonFinalMembers = new ClassWithNonFinalMembers();
+        Assertions.assertNotNull(classWithNonFinalMembers);
+    }
+
+    @Test
+    void whenClassHasFinalAndNonNullMembers_thenGeneratedConstructorHasParameters() {
+        ClassWithFinalNonNullMembers classWithFinalNonNullMembers = new ClassWithFinalNonNullMembers("finalString", "nonNullString");
+        Assertions.assertNotNull(classWithFinalNonNullMembers);
+        Assertions.assertEquals("finalString", classWithFinalNonNullMembers.getFinalStringObject());
+        Assertions.assertEquals("nonNullString", classWithFinalNonNullMembers.getNonNullStringObject());
+        Assertions.assertNull(classWithFinalNonNullMembers.getNonFinalStringObject());
+    }
+}