Create farrowing for gestating sow

gistfile1.cs

[Test]
public void Create_farrowing_for_gestating_sow()
{
    byte parity = 1;

    var farrowing = new Farrowing
    {
        Id = Guid.NewGuid(),
        Date = new DateTime(2011, 3, 22),
        Farm = new PigX.Farms.Farm(),
        Shed = "F",
        Pen = 17,
    };

    var mating = new Mating
    {
        Id = Guid.NewGuid(),
        Date = farrowing.Date.AddDays(-116),
        Fate = GestationFate.Gestating,
    };

    var pig = new Pig
    {
        Id = Guid.NewGuid(),
        Farm = farrowing.Farm,
        Parity = parity,
        Lactation = null,
        Gestation = mating,
    };

    farrowing.Pig = new Pig { Id = pig.Id };

    _repository.Setup(r => r.GetPig(farrowing.Pig.Id)).Returns(pig);
    _repository.Setup(r => r.Add(farrowing)).Returns(farrowing);
    _repository.Setup(r => r.SaveChanges()).Returns(1);

    var result = _service.CreateFarrowing(farrowing);

    Assert.AreEqual(ValidationResult.Success, result);
    Assert.IsNull(pig.Gestation);
    Assert.AreEqual(GestationFate.Farrowed, mating.Fate);
    Assert.AreEqual(farrowing, mating.FateEvent);
    Assert.AreEqual(farrowing, pig.Lactation);
    Assert.AreEqual(parity + 1, pig.Parity);
    Assert.AreEqual(farrowing.Shed, pig.Shed);
    Assert.AreEqual(farrowing.Pen, pig.Pen);
}