📍Use lombok, reformat, and optimize the code (#1560)

* Use lombok, reformat, and optimize the code

* Fix merge conflicts and some sonar issues

Co-authored-by: va1m <va1m@email.com>

feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/propertiesversion/PropertiesFeatureToggleVersionTest.java

@@ -35,17 +35,17 @@ import org.junit.jupiter.api.Test;
 /**
  * Test Properties Toggle
  */
-public class PropertiesFeatureToggleVersionTest {
+class PropertiesFeatureToggleVersionTest {
 
   @Test
-  public void testNullPropertiesPassed() {
+  void testNullPropertiesPassed() {
     assertThrows(IllegalArgumentException.class, () -> {
       new PropertiesFeatureToggleVersion(null);
     });
   }
 
   @Test
-  public void testNonBooleanProperty() {
+  void testNonBooleanProperty() {
     assertThrows(IllegalArgumentException.class, () -> {
       final var properties = new Properties();
       properties.setProperty("enhancedWelcome", "Something");
@@ -54,7 +54,7 @@ public class PropertiesFeatureToggleVersionTest {
   }
 
   @Test
-  public void testFeatureTurnedOn() {
+  void testFeatureTurnedOn() {
     final var properties = new Properties();
     properties.put("enhancedWelcome", true);
     var service = new PropertiesFeatureToggleVersion(properties);
@@ -64,7 +64,7 @@ public class PropertiesFeatureToggleVersionTest {
   }
 
   @Test
-  public void testFeatureTurnedOff() {
+  void testFeatureTurnedOff() {
     final var properties = new Properties();
     properties.put("enhancedWelcome", false);
     var service = new PropertiesFeatureToggleVersion(properties);

feature-toggle/src/test/java/com/iluwatar/featuretoggle/pattern/tieredversion/TieredFeatureToggleVersionTest.java

@@ -35,34 +35,34 @@ import org.junit.jupiter.api.Test;
 /**
  * Test Tiered Feature Toggle
  */
-public class TieredFeatureToggleVersionTest {
+class TieredFeatureToggleVersionTest {
 
   final User paidUser = new User("Jamie Coder");
   final User freeUser = new User("Alan Defect");
   final Service service = new TieredFeatureToggleVersion();
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
     UserGroup.addUserToPaidGroup(paidUser);
     UserGroup.addUserToFreeGroup(freeUser);
   }
 
   @Test
-  public void testGetWelcomeMessageForPaidUser() {
+  void testGetWelcomeMessageForPaidUser() {
     final var welcomeMessage = service.getWelcomeMessage(paidUser);
     final var expected = "You're amazing Jamie Coder. Thanks for paying for this awesome software.";
     assertEquals(expected, welcomeMessage);
   }
 
   @Test
-  public void testGetWelcomeMessageForFreeUser() {
+  void testGetWelcomeMessageForFreeUser() {
     final var welcomeMessage = service.getWelcomeMessage(freeUser);
     final var expected = "I suppose you can use this software.";
     assertEquals(expected, welcomeMessage);
   }
 
   @Test
-  public void testIsEnhancedAlwaysTrueAsTiered() {
+  void testIsEnhancedAlwaysTrueAsTiered() {
     assertTrue(service.isEnhanced());
   }
 }

feature-toggle/src/test/java/com/iluwatar/featuretoggle/user/UserGroupTest.java

@@ -32,24 +32,24 @@ import org.junit.jupiter.api.Test;
 /**
  * Test User Group specific feature
  */
-public class UserGroupTest {
+class UserGroupTest {
 
   @Test
-  public void testAddUserToFreeGroup() {
+  void testAddUserToFreeGroup() {
     var user = new User("Free User");
     UserGroup.addUserToFreeGroup(user);
     assertFalse(UserGroup.isPaid(user));
   }
 
   @Test
-  public void testAddUserToPaidGroup() {
+  void testAddUserToPaidGroup() {
     var user = new User("Paid User");
     UserGroup.addUserToPaidGroup(user);
     assertTrue(UserGroup.isPaid(user));
   }
 
   @Test
-  public void testAddUserToPaidWhenOnFree() {
+  void testAddUserToPaidWhenOnFree() {
     var user = new User("Paid User");
     UserGroup.addUserToFreeGroup(user);
     assertThrows(IllegalArgumentException.class, () -> {
@@ -58,7 +58,7 @@ public class UserGroupTest {
   }
 
   @Test
-  public void testAddUserToFreeWhenOnPaid() {
+  void testAddUserToFreeWhenOnPaid() {
     var user = new User("Free User");
     UserGroup.addUserToPaidGroup(user);
     assertThrows(IllegalArgumentException.class, () -> {