gistfile1.txt

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using CodeSlice.UnitTesting.Model;
using NSpec;

namespace CodeSlice.UnitTesting.NSpec
{
    class describe_Vote : nspec
    {
        void when_validating_a_valid_vote()
        {
            new[] { -1, 1 }.Do(vote =>
                it["of {0}, should be no errors".With(vote)] = () => Validate(vote).should_be_empty()
            );
        }

        void when_validating_an_invalid_vote()
        {
            new[] { -2, 0, 2 }.Do(vote =>
                it["of {0}, should be errors".With(vote)] = () => Validate(vote).should_not_be_empty()
            );
        }

        IEnumerable<ValidationResult> Validate(int value)
        {
            Vote _vote = new Vote { Value = value };
            List<ValidationResult> _results = new List<ValidationResult>();
            ValidationContext _ctx = new ValidationContext(_vote, null, null);
            Validator.TryValidateObject(_vote, _ctx, _results, true);

            return from result in _results
                   where result.MemberNames.Contains("Value")
                   select result;
        }
        // output:
        //      describe Vote
        //        when validating a valid vote
        //          of -1, should be no errors
        //          of 1, should be no errors
        //        when validating an invalid vote
        //          of -2, should be errors
        //          of 0, should be errors
        //          of 2, should be errors
        //
        //      5 Examples, 0 Failed, 0 Pending
    }
}