cadilhac.cs

public class cadilhac : RavenTestBase
{
    public class User
    {
        public string Name;
        public int Age;
    }

    [Fact]
    public void ExploringConcurrencyBehavior()
    {
        using (var store = GetDocumentStore())
        {
            using (var s1 = store.OpenSession())
            {
                s1.Store(new User { Name = "Nick", Age = 99 }, "users/1-A");
                s1.SaveChanges();
            }


            using (var s2 = store.OpenSession())
            {
                s2.Advanced.UseOptimisticConcurrency = true;

                var u2 = s2.Load<User>("users/1-A");

                using (var s3 = store.OpenSession())
                {
                    var u3 = s3.Load<User>("users/1-A");
                    Assert.NotSame(u2, u3);

                    u3.Age--;
                    s3.SaveChanges();
                }

                u2.Age++;

                var u2_2 = s2.Load<User>("users/1-A");
                Assert.Same(u2, u2_2);
                Assert.Equal(1, s2.Advanced.NumberOfRequests);

                Assert.Throws<ConcurrencyException>(() => s2.SaveChanges());
                Assert.Equal(2, s2.Advanced.NumberOfRequests);

                var u2_3 = s2.Load<User>("users/1-A");
                Assert.Same(u2, u2_3);
                Assert.Equal(2, s2.Advanced.NumberOfRequests);

                Assert.Throws<ConcurrencyException>(() => s2.SaveChanges());
            }

            using (var s4 = store.OpenSession())
            {
                var u4 = s4.Load<User>("users/1-A");
                Assert.Equal(98, u4.Age);
            }

        }
    }
}