return &decoder{enc: enc, r: &newlineFilteringReader{r}}
}

// DecodedLen returns the maximum length in bytes of the decoded data
// corresponding to n bytes of base32-encoded data.
func (enc *Encoding) DecodedLen(n int) int {
	return decodedLen(n, enc.padChar)
}

func decodedLen(n int, padChar rune) int {
	if padChar == NoPadding {
		return n/8*5 + n%8*5/8
	}
	return n / 8 * 5

		tests = append(tests, test{rawStdEncoding, math.MaxInt, 5764607523034234879})
	}
	for _, tt := range tests {
		if got := tt.enc.DecodedLen(tt.n); int64(got) != tt.want {
			t.Errorf("DecodedLen(%d): got %d, want %d", tt.n, got, tt.want)
		}
	}
}

func TestWithoutPaddingClose(t *testing.T) {
	encodings := []*Encoding{
		StdEncoding,

	}
	if length <= 0 {
		length = secretKeyMaxLen
	}
	if length < secretKeyMinLen {
		return "", errors.New("auth: secret key length is too short")
	}

	key := make([]byte, base64.RawStdEncoding.DecodedLen(length))
	if _, err := io.ReadFull(random, key); err != nil {
		return "", err
	}

	s := base64.RawStdEncoding.EncodeToString(key)
	return strings.ReplaceAll(s, "/", "+"), nil
}

AAAAAAAAAAEAAAAFAAAAAAAAAAAAAAAAAEAAAAAAAAAAQAAAAAAAfQAAAAAAAAB9AAAAAAAAAAAA
IAAAAAAAsDyZDwU=`

	mysteryBinaryBytes := make([]byte, base64.StdEncoding.DecodedLen(len(encodedMysteryBinary)))
	numBytes, err := base64.StdEncoding.Decode(mysteryBinaryBytes, []byte(encodedMysteryBinary))
	if err != nil {
		t.Fatalf("Unexpected error decoding binary payload: %v", err)
	}

			if v.Type().Elem().Kind() != reflect.Uint8 {
				d.saveError(&UnmarshalTypeError{Value: "string", Type: v.Type(), Offset: int64(d.readIndex())})
				break
			}
			b := make([]byte, base64.StdEncoding.DecodedLen(len(s)))
			n, err := base64.StdEncoding.Decode(b, s)
			if err != nil {
				d.saveError(err)
				break
			}
			v.SetBytes(b[:n])
		case reflect.String:
			t := string(s)