diff --git a/domain/C3PO.java b/domain/C3PO.java
index 8390c99..53ad85d 100644
--- a/domain/C3PO.java
+++ b/domain/C3PO.java
@@ -11,21 +11,21 @@ public class C3PO extends RobotBasics {
       super(id, name);
    }
 
-   public String ausgabe(int[] input) throws RobotException{
-      if(input.length != 0 && !checkArray(input)){
-         return Arrays.stream(input)
-                 .mapToObj(Integer::toString)
-                 .collect(Collectors.joining("; "));
-      }else{
-         throw new RobotException(robotExceptions.MAGICVALUE, getName());
-        // throw new RobotMagicValueException(getName()  + " has an unknown Error. Code 42.");
-      }
-   }
+//   public String ausgabe(int[] input) throws RobotException{
+//      if(input.length != 0 && !checkArray(input)){
+//         return Arrays.stream(input)
+//                 .mapToObj(Integer::toString)
+//                 .collect(Collectors.joining("; "));
+//      }else{
+//         throw new RobotException(robotExceptions.MAGICVALUE, getName());
+//        // throw new RobotMagicValueException(getName()  + " has an unknown Error. Code 42.");
+//      }
+//   }
    @Override
    public String speak(int[] input) throws RobotException {
       if(isPowerOn()){
          try{
-            return ausgabe(input);
+            return ausgabe(input, ";");
          }catch(RobotException re){
             return re.toString();
          }
@@ -39,7 +39,7 @@ public class C3PO extends RobotBasics {
    public int[] sorting(int[] input) throws RobotException{
       if(input.length != 0 ){
          if(checkArray(input)){
-            //sort
+            return insertionSort(input);
          }else{
             throw new RobotException(robotExceptions.MAGICVALUE, getName());
             //throw new RobotMagicValueException(getName() + " has an unknown error. Code 42");
diff --git a/domain/C3POTest.java b/domain/C3POTest.java
index 23fa4d8..d7bdeb9 100644
--- a/domain/C3POTest.java
+++ b/domain/C3POTest.java
@@ -1,6 +1,8 @@
 package domain;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import robot.exceptions.RobotException;
+
 import static org.junit.jupiter.api.Assertions.*;
 
 class C3POTest {
@@ -42,6 +44,98 @@ class C3POTest {
       assertTrue(Herbert.isPowerOn());
    }
 
+   @Test
+   void speak(){
+      Herbert.triggerPowerSwitch();
+      String solution = "12; 2; 4; 5; 12; 2; 4; 7; 56; 433; 23";
+      int[] input = {12, 2, 4, 5, 12, 2, 4, 7, 56, 433, 23};
+      String array = "";
+      try{
+         array = Herbert.speak(input);
+      }catch(RobotException re){
+         System.out.println(re);
+      }
+      assertEquals(0, array.compareTo(solution));
+   }
+
+   @Test
+   void think(){
+
+      int[] solution = { 2, 4, 4, 5, 7, 12, 23, 56, 433};
+      int[] input =    { 4, 5, 12, 2, 4, 7, 56, 433, 23};
+      int[] value = new int[9];
+      try{
+         value = Herbert.think(input);
+      }catch(RobotException re){
+         System.out.println(re);
+      }
+      Herbert.triggerPowerSwitch();
+      try{
+         value = Herbert.think(input);
+      }catch(RobotException re){
+         System.out.println(re);
+      }
+
+      for(int i = 0; i < input.length; i++){
+         assertEquals(solution[i], value[i]);
+      }
+
+   }
+
+   @Test
+   void magicValueException(){
+      int[] input = {3,2,42};
+      Herbert.triggerPowerSwitch();
+      String expectedMessage = "Herbert has an unknown error. Code 42.";
+      try{
+         int[] solution = Herbert.think(input);
+      }catch(RobotException re){
+         assertEquals(0, expectedMessage.compareTo(re.getMessage()));
+      }
+      try{
+         String test = Herbert.speak(input);
+      }catch(RobotException re){
+         assertEquals(0, expectedMessage.compareTo(re.getMessage()));
+      }
+   }
+
+   @Test
+   void illegalStateException(){
+      int[] input = {3,2,42};
+      String expectedMessage = "Herbert is turned off.";
+      try{
+         int[] solution = Herbert.think(input);
+      }catch(RobotException re){
+         assertEquals(0, expectedMessage.compareTo(re.getMessage()));
+      }
+      try{
+         String test = Herbert.speak(input);
+      }catch(RobotException re){
+         assertEquals(0, expectedMessage.compareTo(re.getMessage()));
+      }
+
+   }
+
+   @Test
+   void arrayEmptyException(){
+      String expectedMessage = "Herbert got an empty array.";
+      Herbert.triggerPowerSwitch();
+      try{
+         int[] solution = Herbert.think(new int[0]);
+      }catch(RobotException re){
+         System.out.println(re);
+         assertEquals(0, expectedMessage.compareTo(re.getMessage()));
+      }
+
+      try{
+         String test = Herbert.speak(new int[0]);
+      }catch(RobotException re){
+         System.out.println(re);
+         assertEquals(0, expectedMessage.compareTo(re.getMessage()));
+      }
+   }
+
+
 
 
 }
\ No newline at end of file