public ActionResult Index(CalculatorViewModel viewModel)
{
if (!ModelState.IsValid)
{
viewModel.Result = string.Empty;
}
else
{
try
{
viewModel.Result = this.calculator.GetNthValue(viewModel.N);
}
catch
{
ModelState.AddModelError("Global", "An unexpected error occurred");
}
}
return View(viewModel);
}
public void Post_WithModelError_ClearsResult_Test()
{
// Setup
var viewModel = new CalculatorViewModel
{
N = 100001,
Result = "test"
};
target.ModelState.AddModelError("Test", "Some error message");
// Act
var result = target.Index(viewModel) as ViewResult;
viewModel = result.Model as CalculatorViewModel;
// Assert
Assert.IsNotNull(result);
Assert.IsNotNull(viewModel);
Assert.AreEqual(100001, viewModel.N);
Assert.AreEqual(string.Empty, viewModel.Result);
mockFibonacciCalculator.Verify(o => o.GetNthValue(It.IsAny<int>()), Times.Never);
}
public void Post_WithException_DisplaysError_Test()
{
// Setup
var viewModel = new CalculatorViewModel
{
N = 1,
Result = "1"
};
mockFibonacciCalculator.Setup(o => o.GetNthValue(It.IsAny<int>())).Throws(new Exception());
// Act
var result = target.Index(viewModel) as ViewResult;
viewModel = result.Model as CalculatorViewModel;
// Assert
Assert.IsFalse(target.ModelState.IsValid);
Assert.IsNotNull(result);
Assert.IsNotNull(viewModel);
Assert.AreEqual(1, viewModel.N);
Assert.AreEqual("1", viewModel.Result);
}
public void Post_WithValidN_Test()
{
// Setup
var viewModel = new CalculatorViewModel
{
N = 1
};
mockFibonacciCalculator.Setup(o => o.GetNthValue(1)).Returns("1").Verifiable();
// Act
var result = target.Index(viewModel) as ViewResult;
viewModel = result.Model as CalculatorViewModel;
// Assert
mockFibonacciCalculator.Verify();
Assert.IsNotNull(result);
Assert.IsNotNull(viewModel);
Assert.AreEqual(1, viewModel.N);
Assert.AreEqual("1", viewModel.Result);
}
public ActionResult Index()
{
var viewModel = new CalculatorViewModel();
viewModel.N = 0;
return View(viewModel);
}