*/
    @Test
    public void testTrimPrefix() throws Exception {
        final CopyOptions option = new CopyOptions();
        assertThat(option.trimPrefix("aaa"), is("aaa"));
        option.prefix(BeanNames.search_());
        assertThat(option.trimPrefix("search_aaa"), is("aaa"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testConvertValue_zeroConverter() throws Exception {

func getHandlerName(f http.HandlerFunc, cmdType string) string {
	name := runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()

	packageName := fmt.Sprintf("github.com/minio/minio/cmd.%s.", cmdType)
	name = strings.TrimPrefix(name, packageName)
	name = strings.TrimSuffix(name, "Handler-fm")
	name = strings.TrimSuffix(name, "-fm")
	return name

// the prefix of `text`, otherwise it must be a substring.
func matcher(text, pat string, leadingPercent bool) (res string, match bool) {
	if !leadingPercent {
		res = strings.TrimPrefix(text, pat)
		if len(text) == len(res) {
			return "", false
		}
	} else {
		parts := strings.SplitN(text, pat, 2)
		if len(parts) == 1 {
			return "", false
		}
		res = parts[1]
	}

		return formatUnknown
	}
	for _, f := range magicHeaders {
		if bytes.Equal(f.header, z[:len(f.header)]) {
			return f.f
		}
	}
	return formatUnknown
}

//go:generate stringer -type=format -trimprefix=format $GOFILE
type format int

const (
	formatUnknown format = iota
	formatGzip
	formatZstd
	formatLZ4
	formatS2
	formatBZ2
)

var magicHeaders = []struct {
	header []byte
	f      format

		Message string `xml:"Message"`
	} `xml:"Error"`
	RequestID string `xml:"RequestId"`
}

// STSErrorCode type of error status.
type STSErrorCode int

//go:generate stringer -type=STSErrorCode -trimprefix=Err $GOFILE

// Error codes, non exhaustive list - http://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRoleWithSAML.html
const (
	ErrSTSNone STSErrorCode = iota
	ErrSTSAccessDenied
	ErrSTSMissingParameter

	if !strings.HasPrefix(s, DestinationARNPrefix) && !strings.HasPrefix(s, DestinationARNMinIOPrefix) {
		return Destination{}, Errorf("invalid destination '%s'", s)
	}

	bucketName := strings.TrimPrefix(s, DestinationARNPrefix)

	return Destination{
		Bucket: bucketName,
		ARN:    s,
	}, nil

	case usersPrefix:
		accessKey := path.Dir(strings.TrimPrefix(event.keyPath, iamConfigUsersPrefix))
		err = sys.store.UserNotificationHandler(ctx, accessKey, regUser)
	case stsPrefix:
		accessKey := path.Dir(strings.TrimPrefix(event.keyPath, iamConfigSTSPrefix))
		err = sys.store.UserNotificationHandler(ctx, accessKey, stsUser)
	case svcPrefix:
		accessKey := path.Dir(strings.TrimPrefix(event.keyPath, iamConfigServiceAccountsPrefix))

	"time"

	"github.com/tinylib/msgp/msgp"
	"github.com/zeebo/xxh3"
)

// Op is operation type.
//
//go:generate msgp -unexported -file=$GOFILE
//go:generate stringer -type=Op -output=msg_string.go -trimprefix=Op $GOFILE

// Op is operation type messages.
type Op uint8

// HandlerID is the ID for the handler of a specific type.
type HandlerID uint8

const (
	// OpConnect is a connect request.

	if !strings.HasPrefix(rangeString, byteRangePrefix) {
		return nil, fmt.Errorf("'%s' does not start with '%s'", rangeString, byteRangePrefix)
	}

	// Trim byte range prefix.
	byteRangeString := strings.TrimPrefix(rangeString, byteRangePrefix)

	// Check if range string contains delimiter '-', else return error. eg. "bytes=8"
	sepIndex := strings.Index(byteRangeString, "-")
	if sepIndex == -1 {

							// set, go to the next set
							continue
						}

						for id, usageInfo := range cache.flattenChildrens(*root) {
							prefix := decodeDirObject(strings.TrimPrefix(id, bucket+slashSeparator))
							// decodeDirObject to avoid any __XLDIR__ objects
							m[prefix] += uint64(usageInfo.Size)
						}
					}
				}
			}
			return m, nil
		},
	)