public void BadModel()
{
var model = new CalculatorViewModel() { Expression = new string('1', 201) };
var context = new ValidationContext(model, null, null);
var results = new List<ValidationResult>();
var isModelStateValid = Validator.TryValidateObject(model, context, results, true);
Assert.IsFalse(isModelStateValid);
}
public void GoodModel()
{
var model = new CalculatorViewModel() { Expression = "123" };
var context = new ValidationContext(model, null, null);
var results = new List<ValidationResult>();
var isModelStateValid = Validator.TryValidateObject(model, context, results, true);
Assert.IsTrue(isModelStateValid);
}