public void CompoundInterestResult_ReturnsCorrectViewAndModel()
        {
            //Arrange
            CalculatorsController controller = new CalculatorsController();

            //Act
            ViewResult result = controller.CompoundInterestResult(new CompoundInterestModel()) as ViewResult;

            //Assert
            Assert.IsNotNull(result);                                   //... a ViewResult is returned
            Assert.AreEqual("CompoundInterestResult", result.ViewName); //... the View's  name is CompoundInterestResult
            Assert.IsNotNull(result.Model);                             // View returns a model //... the View is bound with a model
            Assert.IsNotNull(result.Model as CompoundInterestModel);    //... the View's Model is a CompoundInterestCalculator
        }