public void Calc6_Sum0()
 {
     Assert.AreEqual("0", Ex3aLoops.Calc6("21 39 42 58 33 7 ", "0"));
 }
 public void Calc6_Sum100()
 {
     Assert.AreEqual("100", Ex3aLoops.Calc6("11 29 32 28 ", "4"));
 }
 public void Calc6_InvalidCount1()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc6("10 12 14 16 ", "1a"));
 }
 public void Calc6_InvalidCount2()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc6("11 29 32 48 ", "5"));
 }
 public void Calc6_InvalidNumbers()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc6("10 a12 14 16 ", "4"));
 }