func Benchmark(b *testing.B, enc encoding.Encoding)
func TestEncoding(t *testing.T, e encoding.Encoding, encoded, utf8, prefix, suffix string)
func TestFile(t *testing.T, e encoding.Encoding)
Encoder or Decoder
type Transcoder interface { transform.Transformer Bytes([]byte) ([]byte, error) String(string) (string, error) }