public void has_sqlite_provider_factory()
            {
                DbProviderFactory fac = testable_sut().factory;

                fac.ShouldBeType <System.Data.SqlServerCe.SqlCeProviderFactory>();
            }
            public void has_npgsql_provider_factory()
            {
                DbProviderFactory fac = testable_sut().factory;

                fac.ShouldBeType <Npgsql.NpgsqlFactory>();
            }
            public void has_oledb_provider_factory()
            {
                DbProviderFactory fac = testable_sut().factory;

                fac.ShouldBeType <System.Data.OleDb.OleDbFactory>();
            }
            public void has_oracle_provider_factory()
            {
                DbProviderFactory fac = testable_sut().factory;

                fac.ShouldBeType <System.Data.OracleClient.OracleClientFactory>();
            }
            public void has_mysql_provider_factory()
            {
                DbProviderFactory fac = testable_sut().factory;

                fac.ShouldBeType <global::MySql.Data.MySqlClient.MySqlClientFactory>();
            }
            public void has_sql_server_provider_factory()
            {
                DbProviderFactory fac = testable_sut().factory;

                fac.ShouldBeType <SqlClientFactory>();
            }