[TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
            var p = new ProcessDefinition();
            p.Nodes = new System.Collections.Generic.List<Node>();
            p.ID = Guid.NewGuid();
            var s = new StartState();            
            s.ID = Guid.NewGuid();
            p.Nodes.Add(s);
            s.ProcessBlock = p;
            s.ProcessDefinition = p;
            p.StartState = s;
            context c = new context();
            c.Processes.Add(p);

            try
            {
                c.SaveChanges();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }