public void Calc7_Sum0()
 {
     Assert.AreEqual("21", Ex3aLoops.Calc7("21 39 42 58 33 7 ", "0"));
 }
 public void Calc7_Sum200()
 {
     Assert.AreEqual("200", Ex3aLoops.Calc7("21 39 42 58 33 7 ", "6"));
 }
 public void Calc7_Sum100()
 {
     Assert.AreEqual("100", Ex3aLoops.Calc7("11 29 32 28 ", "4"));
 }
 public void Calc7_InvalidCount2()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc7("11 29 32 48 ", "5"));
 }
 public void Calc7_InvalidCount1()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc7("10 12 14 16 ", "1a"));
 }
 public void Calc7_InvalidNumbers()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc7("10 a12 14 16 ", "4"));
 }