Ukonczony krok drugi

StringCalculator/src/test/java/pl/dmcs/CalculatorTest.java

@@ -22,4 +22,11 @@ public class CalculatorTest {
         assertEquals(3, calculator.add("1,2"));
     }
 
+    @Test
+    public void testAddMultipleNumbers() {
+        assertEquals(6, calculator.add("1,2,3"));
+        assertEquals(10, calculator.add("1,2,3,4"));
+        assertEquals(15, calculator.add("1,2,3,4,5"));
+    }
+
 }