using System.Reflection;
using Ploeh.AutoFixture.Kernel;

namespace AutofixtureDemo
{
    public class ContinuousAutoIdSpecimenBuilder : ISpecimenBuilder
    {
        private int _nextId;

        public ContinuousAutoIdSpecimenBuilder()
            : this(1)
        {
        }

        public ContinuousAutoIdSpecimenBuilder(int start)
        {
            _nextId = start;
        }

        public object Create(object request, ISpecimenContext context)
        {
            var pi = request as PropertyInfo;
            if (pi != null && pi.Name.Equals("Id") && pi.PropertyType == typeof(int))
            {
                return _nextId++;
            }

            return new NoSpecimen(request);
        }
    }
}