diff --git a/tests/de/hsmannheim/informatik/name/domain/starwars/ThinkTest.java b/tests/de/hsmannheim/informatik/name/domain/starwars/ThinkTest.java
index 4d461cb..7fc0f2b 100644
--- a/tests/de/hsmannheim/informatik/name/domain/starwars/ThinkTest.java
+++ b/tests/de/hsmannheim/informatik/name/domain/starwars/ThinkTest.java
@@ -11,6 +11,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 class ThinkTest {
 
     private final R2D2 r2d2 = new R2D2(9999, "test");
+    private final C3PO c3po = new C3PO(19999, "test");
 
     ThinkTest() throws RobotIllegalStateException {
     }
@@ -40,6 +41,27 @@ class ThinkTest {
     void thinkTestMagicNumberException() {
         assertThrows(RobotMagicValueException.class, () -> r2d2.think(new int[]{42}));
     }
+    @Test
+    void thinkTestStandardC3PO() throws RobotException {
 
+        assertArrayEquals(new int[]{5, 4, 3, 2, 1, 0}, c3po.think(new int[]{3, 0, 1, 5, 2, 4}));
+    }
+
+    @Test
+    void thinkTestNegativeC3PO() throws RobotException {
+        assertArrayEquals(new int[]{3, 2, 1, 0, -1, -2, -3}, c3po.think(new int[]{0, -3, 2, -1, 1, 3, -2}));
+    }
+    @Test
+    void thinkTestZerosC3PO() throws RobotException {
+        assertArrayEquals(new int[]{0, 0, 0, 0}, c3po.think(new int[]{0, 0, 0, 0}));
+    }
+    @Test
+    void thinkTestEmptyC3PO() throws RobotException {
+        assertArrayEquals(new int[]{}, c3po.think(new int[]{}));
+    }
+    @Test
+    void thinkTestMagicNumberExceptionC3PO(){
+        assertThrows(RobotMagicValueException.class, () -> c3po.think(new int[]{42}));
+    }
 
 }