"\x54\x9e\x08\x29\xf2\x44\x8a\x93\x27\x54\x04",
		io.ErrUnexpectedEOF,
	},
	// This example comes from https://en.wikipedia.org/wiki/Graphics_Interchange_Format.
	{
		"gif;LSB;8",
		"\x28\xff\xff\xff\x28\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
		"\x00\x51\xfc\x1b\x28\x70\xa0\xc1\x83\x01\x01",
		nil,
	},
	// This example comes from http://compgroups.net/comp.lang.ruby/Decompressing-LZW-compression-from-PDF-file
	{
		"pdf;MSB;8",

}

var golden224 = []sha512Test{
	{
		"6ed0dd02806fa89e25de060c19d3ac86cabb87d6a0ddd05c333b84f4",
		"",

// in comment ` + "\x00" + `  // ERROR "NUL"

/* in other comment ` + "\x00" + ` */ // ERROR "NUL"

/* in source code */ ` + "\x00" + `// ERROR "NUL"

var xx = "in string ` + "\xc2\xff" + `" // ERROR "UTF-8"

var yy = ` + "`in raw string \xff foo`" + `  // ERROR "UTF-8"

// in comment ` + "\xe2\x80\x01" + `  // ERROR "UTF-8"

/* in other comment ` + "\xe0\x00\x00" + ` */ // ERROR "UTF-8|NUL"

/* in variable name */

	"(\xb5/\xfd00}\x00\x0020\x00\x9000000000000",
	"(\xb5/\xfd00}\x00\x00&0\x02\x830!000000000",
	"(\xb5/\xfd\x1002000$\x05\x0010\xcc0\xa8100000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",

	{0x211297c8, strings.Repeat("\xff", 5548) + "8", "adl\x01\x9a\xa6\xcb\xc1"},
	{0xbaa198c8, strings.Repeat("\xff", 5549) + "9", "adl\x01gu\xcc\xc0"},
	{0x553499be, strings.Repeat("\xff", 5550) + "0", "adl\x01gu\xcc\xc0"},
	{0xf0c19abe, strings.Repeat("\xff", 5551) + "1", "adl\x015CͿ"},
	{0x8d5c9bbe, strings.Repeat("\xff", 5552) + "2", "adl\x015CͿ"},
	{0x2af69cbe, strings.Repeat("\xff", 5553) + "3", "adl\x01\x04\x10ξ"},

	{0x8ec0e7c835bf9cdf, 0x8a0825223ea6d221, "Discard medicine more than two years old.", "crc\x02s\xba\x84\x84\xbb\xcd]\xef\xc6\xc0\f\xac'\x11\x12\xd5", "crc\x02`&\x9aR\xe1\xb7\xfee\xfd%\xc0&\xa0R\xef\x95"},
	{0xc7db1759e2be5ab4, 0x8562c0ac2ab9a00d, "He who has a shady past knows that nice guys finish last.", "crc\x02s\xba\x84\x84\xbb\xcd]\xef\t\xcb\xd15X[r\t", "crc\x02`&\x9aR\xe1\xb7\xfee\a\x02\xe8|+\xc1\x06\xe3"},

		})
}

// If the PROXY protocol is enabled, and no XFF header is provided, client forwarded IPs from the PROXY protocol payload
// should be used to populate the upstream XFF header.
//
// If the PROXY protocol is enabled, and additionally an XFF header is provided AND numTrustedProxies is set, the XFF header on the incoming request
// will take precedence when populating the upstream XFF header.
func TestProxyProtocolTCPGateway(t *testing.T) {

		}
	}
	filterSrcsetElement(s, written, len(s), &b)
	return b.String()
}

// Derived from https://play.golang.org/p/Dhmj7FORT5
const htmlSpaceAndASCIIAlnumBytes = "\x00\x36\x00\x00\x01\x00\xff\x03\xfe\xff\xff\x07\xfe\xff\xff\x07"

// isHTMLSpace is true iff c is a whitespace character per
// https://infra.spec.whatwg.org/#ascii-whitespace
func isHTMLSpace(c byte) bool {

	{faces, "~", -1, []string{faces}},
	{"1 2 3 4", " ", 3, []string{"1", "2", "3 4"}},
	{"1 2", " ", 3, []string{"1", "2"}},
	{"", "T", math.MaxInt / 4, []string{""}},
	{"\xff-\xff", "", -1, []string{"\xff", "-", "\xff"}},
	{"\xff-\xff", "-", -1, []string{"\xff", "\xff"}},
}

func TestSplit(t *testing.T) {
	for _, tt := range splittests {
		a := SplitN(tt.s, tt.sep, tt.n)
		if !eq(a, tt.a) {

type XfccAuthenticator struct{}

var _ security.Authenticator = &XfccAuthenticator{}

func (xff XfccAuthenticator) AuthenticatorType() string {
	return XfccAuthenticatorType
}

// Authenticate extracts identities from Xfcc Header.
func (xff XfccAuthenticator) Authenticate(ctx security.AuthContext) (*security.Caller, error) {
	remoteAddr := ctx.RemoteAddress()