Tests for Karte Class

Added tests for the Karte class.

tests/KarteTest.java

@@ -9,7 +9,7 @@ class KarteTest {
 
         for (int i = 0; i < successTestList.length; i++){
             Karte testKarte = new Karte("Herz", successTestList[i]);
-            assertEquals(successResultList[i], testKarte.getPunkte());
+            assertEquals(successResultList[i], testKarte.getWert());
         }
     }
 }