Creating a value dependent on another value using AutoPoco

Question

I use the large .NET AutoPoco library to create test and seed data.

In my model, I have 2 date properties, StartDate and EndDate.

I want EndDate to be 3 hours after the start date.

I created my own data source for autopoco below, which returns a random Datetime time between the minimum and maximum date

class DefaultRandomDateSource : DatasourceBase<DateTime>
{
    private DateTime _MaxDate { get; set; }
    private DateTime _MinDate { get; set; }
    private Random _random { get; set; }


    public DefaultRandomDateSource(DateTime MaxDate, DateTime MinDate)
    {
        _MaxDate = MaxDate;
        _MinDate = MinDate;

    }

    public override DateTime Next(IGenerationSession session)
    {
        var tspan = _MaxDate - _MinDate;
        var rndSpan = new TimeSpan(0, _random.Next(0, (int) tspan.TotalMinutes), 0);


        return _MinDate + rndSpan;
    }

}

But in the AutoPoco configuration, how can I get EndDate to say 3 hours after the auto-generated start date?

Here is the autopoco configuration

 IGenerationSessionFactory factory = AutoPocoContainer.Configure(x =>
            {
                x.Conventions(c => { c.UseDefaultConventions(); });
                x.AddFromAssemblyContainingType<Meeting>();
                x.Include<Meeting>()
                    .Setup((c => c.CreatedBy)).Use<FirstNameSource>()
                    .Setup(c => c.StartDate).Use<DefaultRandomDateSource>(DateTime.Parse("21/05/2011"), DateTime.Parse("21/05/2012"));
            });

Answer 1

, : EndDate StartDate. DataSource , . , , StartDate EndDate ( , , , AutoPoco). CodePlex (20 2012 .).

public class MeetingsGenerator
{
    public static IList<Meeting> CreateMeeting(int count)
    {
        var factory = AutoPocoContainer.Configure(x =>
        {
            x.Conventions(c => { c.UseDefaultConventions(); });
            x.Include<Meeting>()
                .Setup((c => c.CreatedBy)).Use<FirstNameSource>()
                .Setup(c => c.StartDate).Use<DefaultRandomDateSource>
                                  (DateTime.Parse("21/May/2012"), 
                                    DateTime.Parse("21/May/2011"))
                .Setup(c => c.EndDate).Use<MeetingEndDateSource>(0, 8);
        });
        return factory.CreateSession().List<Meeting>(count).Get();
    }
}

public class Meeting
{
    public string CreatedBy { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
}

public class MeetingEndDateSource : DatasourceBase<DateTime>
{
    private int mMin;
    private int mMax;
    private Random mRandom = new Random(1337);

    public MeetingEndDateSource(int min, int max)
    {
        mMin = min;
        mMax = max;
    }

    public override DateTime Next(IGenerationContext context)
    {
        var node = (TypeGenerationContextNode)((context.Node).Parent);
        var item = node.Target) as Meeting;

        if (item == null)
            return DateTime.Now;

        return item.StartDate.AddHours(mRandom.Next(mMin, mMax + 1));
    }
}

class DefaultRandomDateSource : DatasourceBase<DateTime>
{
    private DateTime _MaxDate { get; set; }
    private DateTime _MinDate { get; set; }
    private Random _random = new Random(1337);

    public DefaultRandomDateSource(DateTime MaxDate, DateTime MinDate)
    {
        _MaxDate = MaxDate;
        _MinDate = MinDate;
    }

    public override DateTime Next(IGenerationContext context)
    {
        var tspan = _MaxDate - _MinDate;

        var rndSpan = new TimeSpan(0 
                                  , _random.Next(0, (int)tspan.TotalMinutes)
                                  , 0);

        return _MinDate + rndSpan;
    }
}