small bug fix

src/de/hsmannheim/informatik/name/domain/starwars/C3PO.java

@@ -34,6 +34,9 @@ public class C3PO extends StarWarsRobot {
     //A: RobotMagicValueException is a subclass of RobotException. So if a RobotException is thrown in a method,
     // the Method signature is already covered for any subclass of RobotException that is thrown inside the method
     public int[] think(int[] numbers) throws RobotException {
+        if (!this.isPowerOn()) {
+            throw new RobotIllegalStateException("The robot is not on!", this);
+        }
         int[] arrToSort = numbers.clone();
         for (int k : arrToSort) {
             if (k == MAGIC_NUMBER) {

src/de/hsmannheim/informatik/name/domain/starwars/R2D2.java

@@ -31,6 +31,9 @@ public class R2D2 extends StarWarsRobot {
      */
     @Override
     public int[] think(int[] numbers) throws RobotException {
+        if (!this.isPowerOn()) {
+            throw new RobotIllegalStateException("The robot is not on!", this);
+        }
         int[] arrayToSort = numbers.clone();
         for (int i = 0; i < arrayToSort.length; i++) {
             if (arrayToSort[i] == MAGIC_NUMBER) {

src/de/hsmannheim/informatik/name/domain/starwars/StarWarsRobot.java

@@ -33,6 +33,9 @@ public abstract class StarWarsRobot extends RobotBluePrint {
      */
     @Override
     public String speak(int[] numbers) throws RobotException {
+        if (!this.isPowerOn()) {
+            throw new RobotIllegalStateException("The robot is not on!", this);
+        }
         if (Arrays.stream(numbers).anyMatch(i -> i == MAGIC_NUMBER)) {
             throw new RobotMagicValueException(String.format("Appearance of Magic Number: %d", MAGIC_NUMBER), this);
         }

tests/de/hsmannheim/informatik/name/domain/starwars/SpeakTest.java

@@ -10,11 +10,13 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 
 
 class SpeakTest {
+    final R2D2 r2d2 = new R2D2(9999, "test");
+    final C3PO c3po = new C3PO(19999, "test");
 
-    private final R2D2 r2d2 = new R2D2(9999, "test");
-    private final C3PO c3po = new C3PO(19999, "test");
 
     SpeakTest() throws RobotIllegalStateException {
+        r2d2.triggerPowerSwitch();
+        c3po.triggerPowerSwitch();
     }
 
     @Test

tests/de/hsmannheim/informatik/name/domain/starwars/ThinkTest.java

@@ -14,11 +14,12 @@ class ThinkTest {
     private final C3PO c3po = new C3PO(19999, "test");
 
     ThinkTest() throws RobotIllegalStateException {
+        r2d2.triggerPowerSwitch();
+        c3po.triggerPowerSwitch();
     }
 
     @Test
     void thinkTestStandard() throws RobotException {
-
         assertArrayEquals(new int[]{0, 1, 2, 3, 4, 5}, r2d2.think(new int[]{3, 0, 1, 5, 2, 4}));
     }
 
@@ -43,7 +44,6 @@ class ThinkTest {
     }
     @Test
     void thinkTestStandardC3PO() throws RobotException {
-
         assertArrayEquals(new int[]{5, 4, 3, 2, 1, 0}, c3po.think(new int[]{3, 0, 1, 5, 2, 4}));
     }