public void GivenBracketsInputErrorIsThrownAndNoResultGiven()
{
var viewModel = new CalculationViewModel()
{
Expression = "2*(2+8)"
};
var errors = viewModel.Validate();
Assert.IsNotEmpty(errors);
}
public void GivenInputBeginsWithOperatorErrorIsThrownAndNoResultGiven()
{
var viewModel = new CalculationViewModel()
{
Expression = "+2*2+8"
};
var errors = viewModel.Validate();
Assert.IsNotEmpty(errors);
}
public void GivenDecimalInputErrorIsThrownAndNoResultGiven()
{
var viewModel = new CalculationViewModel()
{
Expression = "1.3+4"
};
var errors = viewModel.Validate();
Assert.IsNotEmpty(errors);
}
public void GivenAlphabeticInputErrorIsThrownAndNoResultGiven()
{
var viewModel = new CalculationViewModel()
{
Expression = "House"
};
var errors = viewModel.Validate();
Assert.IsNotEmpty(errors);
}
public void GivenValidInputErrorIsNotThrownAndResultIsGiven(string expressionInput)
{
var viewModel = new CalculationViewModel()
{
Expression = expressionInput
};
var errors = viewModel.Validate();
Assert.IsEmpty(errors);
}
public void GivenInputHasConsecutiveOperatorsErrorIsThrownAndNoResultGiven()
{
var viewModel = new CalculationViewModel()
{
Expression = "12+-67"
};
var errors = viewModel.Validate();
Assert.IsNotEmpty(errors);
}
public IActionResult PerformCalculation(CalculationViewModel model)
{
var errors = model.Validate();
if (errors.Count > 0)
{
foreach (var error in errors)
{
ModelState.AddModelError(error.Key, error.Value);
}
return(View("Index", model));
}
model.Result = CalculationHelper.GetExpressionResult(model.Expression);
return(View("Index", model));
}