public void AttachDB_DetachDB_inmemory()
        {
            using (var maindb = new CruiseDatastore())
                using (var db2 = new CruiseDatastore())
                {
                    maindb.AttachDB(db2, "db2");

                    maindb.Invoking(x => x.Execute("SELECT count(*) FROM db2.sqlite_master"))
                    .Should().NotThrow();

                    maindb.DetachDB("db2");

                    maindb.Invoking(x => x.Execute("SELECT count(*) FROM db2.sqlite_master"))
                    .Should().Throw <SQLException>();
                }
        }