Fixed most reported issues by SonarCloud.

extension-objects/src/test/java/concreteextensions/SergeantTest.java

@@ -23,17 +23,41 @@
 
 package concreteextensions;
 
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.read.ListAppender;
 import org.junit.jupiter.api.Test;
+import org.slf4j.LoggerFactory;
 import units.SergeantUnit;
 
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 /**
  * Created by Srdjan on 03-May-17.
  */
-public class SergeantTest {
+class SergeantTest {
+
   @Test
-  public void sergeantReady() {
+  void sergeantReady() {
+
+    Logger sergeantLogger = (Logger) LoggerFactory.getLogger(Sergeant.class);
+
+    ListAppender<ILoggingEvent> listAppender = new ListAppender<>();
+    listAppender.start();
+
+    sergeantLogger.addAppender(listAppender);
+
     final var sergeant = new Sergeant(new SergeantUnit("SergeantUnitTest"));
     sergeant.sergeantReady();
+
+    List<ILoggingEvent> logsList = listAppender.list;
+    assertEquals("[Sergeant] " + sergeant.getUnit().getName() + " is ready!", logsList.get(0)
+            .getMessage());
+    assertEquals(Level.INFO, logsList.get(0)
+            .getLevel());
   }
 
 }