refactor: renamed Validation to ValidationUtility

src/main/java/uulm/teamname/marvelous/gamelibrary/json/ValidationUtility.java

@@ -1,26 +1,23 @@
 package uulm.teamname.marvelous.gamelibrary.json;
 
 import jakarta.validation.ConstraintViolation;
+import jakarta.validation.Validation;
 import jakarta.validation.Validator;
 
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
 
-public class Validation {
-    private Validation() {}
+public class ValidationUtility {
+    private ValidationUtility() {}
 
     private static final Validator validator;
 
     static {
-        var factory = jakarta.validation.Validation.buildDefaultValidatorFactory();
+        var factory = Validation.buildDefaultValidatorFactory();
         validator = factory.getValidator();
     }
 
-    public static Set<ConstraintViolation<Object>> validate(Object object) {
-        return validator.validate(object);
-    }
-
     /**
      * Validates the given object by using a {@link Validator}, and generates
      * a {@link String} from the violations. If there aren't any violations, and the object perfectly
@@ -29,7 +26,7 @@ public class Validation {
      * @return an {@link Optional}<{@link String}> describing the violations the object commits,
      *         or an empty {@link Optional} if there aren't any
      */
-    public static Optional<String> validateAndGetString(Object object) {
+    public static Optional<String> validate(Object object) {
         var violations = validator.validate(object);
         if (violations.isEmpty()) return Optional.empty();
         else {

src/test/java/uulm/teamname/marvelous/gamelibrary/messages/MessageValidationUtilityTest.java

@@ -4,6 +4,7 @@ import jakarta.validation.ConstraintViolation;
 import jakarta.validation.ValidatorFactory;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import uulm.teamname.marvelous.gamelibrary.json.ValidationUtility;
 import uulm.teamname.marvelous.gamelibrary.messages.client.CharacterSelectionMessage;
 
 import jakarta.validation.Validation;
@@ -15,7 +16,7 @@ import static org.mockito.Mockito.*;
 import static org.junit.jupiter.api.Assertions.*;
 import static org.assertj.core.api.Assertions.*;
 
-class MessageValidationTest {
+class MessageValidationUtilityTest {
 
     ValidatorFactory factory;
     Validator validator;
@@ -49,6 +50,9 @@ class MessageValidationTest {
         assertThat(violations).isNotEmpty();
         assertThat(violationsString)
                 .isEqualTo("characters doesn't have twelve elements");
+
+        assertThat(ValidationUtility.validate(message).get())
+                .isEqualTo("characters: doesn't have twelve elements");
     }
 
 }