setup tests for HelloWorldService

pom.xml

@@ -48,6 +48,34 @@
             <artifactId>sqlite-jdbc</artifactId>
             <version>3.43.0.0</version>
         </dependency>
+
+        <!-- JUnit 5 for unit testing -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.9.3</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.9.3</version>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- Mockito for mocking (optional, for future complex tests) -->
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>5.3.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-junit-jupiter</artifactId>
+            <version>5.3.1</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -70,6 +98,16 @@
                     <failOnMissingWebXml>false</failOnMissingWebXml>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.22.2</version>
+                <configuration>
+                    <includes>
+                        <include>**/*Test.java</include>
+                    </includes>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 </project>