public void Calc1_0Mo100US()
 {
     Assert.AreEqual("100.50", Ex3aLoops.Calc1("0", "100.0", "0.005"));
 }
 public void Calc1_120Mo20US()
 {
     Assert.AreEqual("2,892.37", Ex3aLoops.Calc1("120", "20.0", "0.003"));
 }
 public void Calc1_12Mo100US()
 {
     Assert.AreEqual("1,231.66", Ex3aLoops.Calc1("12", "100.0", "0.004"));
 }
 public void Calc1_InvalidRate()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc1("24", "100.0", ""));
 }
 public void Calc1_InvalidPayment()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc1("24", "", "0.005"));
 }
 public void Calc1_InvalidMonths()
 {
     Assert.AreEqual("Invalid input", Ex3aLoops.Calc1("", "100.0", "0.005"));
 }