使用MbUnit3的[Rollback]对NHibernate与SQLite的交互进行单元测试

背景:

我的团队致力于确保直接从签出开始,我们的代码编译和单元测试就能成功运行。为了促进这一点并测试一些NHibernate映射,我们在存储库中添加了一个SQLite DB,它是生产SQL Server 2005数据库的镜像。我们正在使用最新版本的:MbUnit3(Gallio的一部分)、System.Data.SQLite和NHibernate。

问题:

我发现下面的单元测试不适用于SQLite,尽管对SQLServer2005执行时没有遇到问题。

    [Test]
    [Rollback]
    public void CompleteCanPersistNode()
    {
        // returns a Configuration for either SQLite or SQL Server 2005 depending on how the project is configured.
        Configuration config = GetDbConfig(); 

        ISessionFactory sessionFactory = config.BuildSessionFactory();
        ISession session = sessionFactory.OpenSession();

        Node node = new Node();
        node.Name = "Test Node";
        node.PhysicalNodeType = session.Get<NodeType>(1);

        // SQLite fails with the exception below after the next line called.
        node.NodeLocation = session.Get<NodeLocation>(2);

        session.Save(node);
        session.Flush();

        Assert.AreNotEqual(-1, node.NodeID);
        Assert.IsNotNull(session.Get<Node>(node.NodeID));
    }

NHibernate.ADOException: cannot open connection --->
System.Data.SQLite.SQLiteException:
  The database file is locked database is locked
    at System.Data.SQLite.SQLite3.Step(SQLiteStatement stmt)
    at System.Data.SQLite.SQLiteDataReader.NextResult()
    at System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave)
    at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
    at System.Data.SQLite.SQLiteCommand.ExecuteNonQuery()
    at System.Data.SQLite.SQLiteTransaction..ctor(SQLiteConnection connection, Boolean deferredLock)
    at System.Data.SQLite.SQLiteConnection.BeginDbTransaction(IsolationLevel isolationLevel)
    at System.Data.SQLite.SQLiteConnection.BeginTransaction()
    at System.Data.SQLite.SQLiteEnlistment..ctor(SQLiteConnection cnn, Transaction scope)
    at System.Data.SQLite.SQLiteConnection.EnlistTransaction(Transaction transaction)
    at System.Data.SQLite.SQLiteConnection.Open()
    at NHibernate.Connection.DriverConnectionProvider.GetConnection()
    at NHibernate.Impl.SessionFactoryImpl.OpenConnection()
    --- End of inner exception stack trace ---
    at NHibernate.Impl.SessionFactoryImpl.OpenConnection()
    at NHibernate.AdoNet.ConnectionManager.GetConnection()
    at NHibernate.AdoNet.AbstractBatcher.Prepare(IDbCommand cmd)
    at NHibernate.AdoNet.AbstractBatcher.ExecuteReader(IDbCommand cmd)
    at NHibernate.Loader.Loader.GetResultSet(IDbCommand st, Boolean autoDiscoverTypes, Boolean callable, RowSelection selection, ISessionImplementor session)
    at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies)
    at NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies)
    at NHibernate.Loader.Loader.LoadEntity(ISessionImplementor session, Object id, IType identifierType, Object optionalObject, String optionalEntityName, Object optionalIdentifier, IEntityPersister persister)
    at NHibernate.Loader.Entity.AbstractEntityLoader.Load(ISessionImplementor session, Object id, Object optionalObject, Object optionalId)
    at NHibernate.Loader.Entity.AbstractEntityLoader.Load(Object id, Object optionalObject, ISessionImplementor session)
    at NHibernate.Persister.Entity.AbstractEntityPersister.Load(Object id, Object optionalObject, LockMode lockMode, ISessionImplementor session)
    at NHibernate.Event.Default.DefaultLoadEventListener.LoadFromDatasource(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options)
    at NHibernate.Event.Default.DefaultLoadEventListener.DoLoad(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options)
    at NHibernate.Event.Default.DefaultLoadEventListener.Load(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options)
    at NHibernate.Event.Default.DefaultLoadEventListener.ProxyOrLoad(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options)
    at NHibernate.Event.Default.DefaultLoadEventListener.OnLoad(LoadEvent event, LoadType loadType)
    at NHibernate.Impl.SessionImpl.FireLoad(LoadEvent event, LoadType loadType)
    at NHibernate.Impl.SessionImpl.Get(String entityName, Object id)
    at NHibernate.Impl.SessionImpl.Get(Type entityClass, Object id)
    at NHibernate.Impl.SessionImpl.Get[T](Object id)
D:\dev\598\Code\test\unit\DataAccess.Test\NHibernatePersistenceTests.cs

问题:

这是因为System.Data.SQLite实现了MbUnit3用于[Rollback]的TransactionScope,还是因为SQLite引擎的限制?