// test the tsv codec
        public void TestTsvExport(DBFile originalFile)
        {
            Tuple <string, int> tuple = new Tuple <string, int>(originalFile.CurrentType.Name, originalFile.Header.Version);
            DBFile reimport;

            try {
                // export to tsv
                TextDbCodec codec      = new TextDbCodec();
                string      exportPath = Path.Combine(Path.GetTempPath(), "exportTest.tsv");
#if DEBUG
                if (originalFile.CurrentType.Name.Equals(debug_at))
                {
                    Console.WriteLine("stop right here");
                }
#endif
                using (Stream filestream = File.Open(exportPath, FileMode.Create)) {
                    codec.Encode(filestream, originalFile);
                }
                // re-import
                using (Stream filestream = File.OpenRead(exportPath)) {
                    reimport = codec.Decode(filestream);
                    // check all read values against original ones
                    for (int row = 0; row < originalFile.Entries.Count; row++)
                    {
                        for (int column = 0; column < originalFile.CurrentType.Fields.Count; column++)
                        {
                            FieldInstance originalValue = originalFile[row, column];
                            FieldInstance reimportValue = reimport[row, column];
                            if (!originalValue.Equals(reimportValue))
                            {
                                tsvFails.Add(tuple);
                            }
                        }
                    }
                }
            } catch (Exception x) {
                Console.WriteLine(x);
                tsvFails.Add(tuple);
            }
        }