Feature 1

String calculator

@@ -2,6 +2,10 @@
 #test no string
 #test add 1 string
 #test adding 2 strings
+
+#add 3 strings
+#add 4 strings
+#add 6 strings
 import unittest
 
 class StringCalculator:
@@ -10,11 +14,10 @@ class StringCalculator:
             return 0
         else:
             number_list = numbers.split(',')#aufteilung der strings
-            if len(number_list) ==1:
-                return int(number_list[0])#bei einem string wird er in int umgewandelt
-            elif len(number_list)==2:
-                return int(number_list[0])+ int(number_list[1])#bei 2 strings wird beides in int verwandelt und die summe zurück gegeben(Position 1/0+Position 2/1)
-            return 0
+            total_sum = 0
+            for number_str in number_list: #jedes element in der liste wird durch genommen
+                total_sum += int(number_str)# summierung der integer
+            return total_sum 
         
     
 class TestStingCalculator(unittest.TestCase):
@@ -27,6 +30,11 @@ class TestStingCalculator(unittest.TestCase):
     def test_multiple_numbers(self):
         calculator=StringCalculator()
         self.assertEqual(calculator.add("5,5"),10)#eingabe mehrere strings
+    def test_unknowen_amount_of_numbers(self):
+        calculator = StringCalculator()
+        self.assertEqual(calculator.add("1,2,3"),6)
+        self.assertEqual(calculator.add("10,20,30,40"),100)
+        self.assertEqual(calculator.add("1,2,3,4,5,6"),21)
 
 if __name__=='__main__':
     unittest.main()