Nhibernate and SQLite Exception "Cannot write to a Closed TextWriter" - unit-testing

Question

I'm trying to use NHibernate with SQLite for Unit Testing. But I'm keep getting error
ADOException was unhandled by user code
While preparing INSERT INTO User (First_Name, Last_Name, UserName, Password, Email, Active, Default_Clinic_Identification_Number, Login_Icon, Created_Date, Created_By, Modified_Date, Modified_By) VALUES (#p0, #p1, #p2, #p3, #p4, #p5, #p6, #p7, #p8, #p9, #p10, #p11); select last_insert_rowid() an error occurred
Inner Exception: {"Cannot write to a closed TextWriter."}
I don't know what i'm doing wrong. Here is my code
public class InMemoryDatabaseTest : IDisposable
{
private static Configuration Configuration;
private static ISessionFactory SessionFactory;
protected ISession session;
public InMemoryDatabaseTest()
{
if (Configuration == null)
{
Assembly a = Assembly.Load("Astute.Framework.Data");
Configuration = new Configuration()
.SetProperty(Environment.ReleaseConnections, "on_close")
.SetProperty(Environment.Dialect, typeof(SQLiteDialect).AssemblyQualifiedName)
.SetProperty(Environment.ConnectionDriver, typeof(SQLite20Driver).AssemblyQualifiedName)
.SetProperty(Environment.ConnectionString, "data source=:memory:")
.SetProperty(Environment.ProxyFactoryFactoryClass, typeof(ProxyFactoryFactory).AssemblyQualifiedName)
.AddAssembly(a);
SessionFactory = Configuration.BuildSessionFactory();
}
session = SessionFactory.OpenSession();
new SchemaExport(Configuration).Execute(true, true, false, session.Connection, Console.Out);
}
public void Dispose()
{
session.Dispose();
}
}
[TestClass]
public class Test : InMemoryDatabaseTest
{
[TestMethod]
public void CanSaveUser()
{
object id;
using (var tx = session.BeginTransaction())
{
id = session.Save(new User
{
FirstName = "Imran",
LastName = "Ashraf",
UserName = "imran",
Password = "Test",
Email = "Test#test.com",
IsActive = true,
DefaultClinicIdentifcationNumber = "",
LoginIcon = "",
CreatedBy = 1000000,
CreatedDate = DateTime.Today,
ModifiedBy = 1000000,
ModifiedDate = DateTime.Today
});
tx.Commit();
}
session.Clear();
}
}
I'm getting error on this line id = session.Save. I got this example from http://ayende.com/Blog/archive/2009/04/28/nhibernate-unit-testing.aspx
Any idea?
Thanks in advance.

Answer 1

The error message "Inner Exception: {"Cannot write to a closed TextWriter."}" is given when you are trying to write into the Console.Out.
I created a new TextWriter and used it:
TextWriter writer = null;
new SchemaExport(Configuration).Execute(true, true, false, session.Connection, writer);
That fixed that exception.

Answer 2

I can't see the problem. I use this as connection string:
Data Source=:memory:;Version=3;New=True;
You may try it to see if it solves the problem. The New=True; part looks promising.

Answer 3

In my case I noticed that I used two instances of InMemoryDatabaseTest. I deleted one instance from the test.