public void DoSumming_UsingRomanNumbersAsLeftAndRightOperand_DisplaysSummingResult()
{
SummingModel summingModel = new SummingModel {LeftOperand = "MD", RightOperand = "LX"};
SummingController summingController = new SummingController();
ViewResult viewResult = (ViewResult) summingController.DoSumming(summingModel);
Assert.AreEqual("MDLX", viewResult.ViewBag.SummingResult);
}
public void DoSumming_UsingInvalidRomanNumberAsRightOperand_DisplaysError()
{
SummingModel summingModel = new SummingModel {LeftOperand = "MD", RightOperand = "IIII"};
SummingController summingController = new SummingController();
summingController.DoSumming(summingModel);
Assert.IsTrue(summingController.ModelState.ContainsKey("RightOperand"));
}
public void DoSumming_UsingMissingRightOperand_DisplaysError()
{
SummingModel summingModel = new SummingModel {LeftOperand = "leftoperand"};
SummingController summingController = new SummingController();
summingController.DoSumming(summingModel);
Assert.IsTrue(summingController.ModelState.ContainsKey("RightOperand"));
}
public ActionResult DoSumming(SummingModel model)
{
if (ModelState.IsValid)
{
bool hasErrors = false;
RomanNumber leftOperand;
RomanNumber rightOperand;
if (!RomanNumber.TryParse(model.LeftOperand, out leftOperand))
{
ModelState.AddModelError("LeftOperand", string.Format("'{0}' is not a valid Roman number", model.LeftOperand));
hasErrors = true;
}
if (!RomanNumber.TryParse(model.RightOperand, out rightOperand))
{
ModelState.AddModelError("RightOperand", string.Format("'{0}' is not a valid Roman number", model.RightOperand));
hasErrors = true;
}
if (!hasErrors)
{
Abacus abacus = new RomanAbacus(100); // Roman abacus wil be able to handle hundreds of thousands
ViewBag.SummingResult = abacus.PerformSumming(model.LeftOperand, model.RightOperand);
}
}
InitSummingView();
return View("Index", model);
}
