public void Verify_complex_expression_evaluation()
{
var evaluator = new Evaluator();
Assert.IsTrue(evaluator.Compute("(true || ((true || (false || true)))) || (true && true && false || (false || true && (true && true || ((false))))) && false"));
Assert.IsTrue(evaluator.Compute("( !!((!(!!!true || !!false || !true))) && true && !(true && false) ) && (!((!(!true))) || !!!(((!true))))"));
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (DependentProperties.Length != TargetValues.Length)
throw new ArgumentException("Number of elements in DependentProperties and TargetValues must match.");
var tokens = new List<object>();
for (var i = 0; i < DependentProperties.Count(); i++)
{
var dependentValue = Helper.ExtractValue(validationContext.ObjectInstance, DependentProperties[i]);
var targetValue = Helper.FetchTargetValue(TargetValues[i], validationContext);
var result = Helper.Compare(dependentValue, targetValue);
tokens.Add(result.ToString().ToLowerInvariant());
}
var expression = string.Format(Expression, tokens.ToArray());
var evaluator = new Evaluator();
if (evaluator.Compute(expression))
{
// match => means we should try to validate this field
if (!_innerAttribute.IsValid(value) || (value is bool && !(bool) value))
{
// validation failed - return an error
return new ValidationResult(string.Format(ErrorMessageString, validationContext.DisplayName));
}
}
return ValidationResult.Success;
}