check(t, "TestBasicOperations (1)", &buf, "")

		buf.Reset()
		check(t, "TestBasicOperations (2)", &buf, "")

		buf.Truncate(0)
		check(t, "TestBasicOperations (3)", &buf, "")

		n, err := buf.Write(testBytes[0:1])
		if want := 1; err != nil || n != want {
			t.Errorf("Write: got (%d, %v), want (%d, %v)", n, err, want, nil)
		}
		check(t, "TestBasicOperations (4)", &buf, "a")

}

var (
	updateGolden = flag.Bool("updategolden", false, "update golden files")
)

func TestGolden(t *testing.T) {
	if *flagCheck {
		// slow, not worth repeating in -check
		t.Skip("skipping with -check set")
	}

	testenv.MustHaveGoBuild(t)

	td, err := os.Open("testdata/src/pkg")
	if err != nil {
		t.Fatal(err)
	}
	fis, err := td.Readdir(0)
	if err != nil {
		t.Fatal(err)
	}
	for _, fi := range fis {

	}
}

func TestCVE202139293(t *testing.T) {
	// directory size is so large, that the check in Reader.init
	// overflows when subtracting from the archive size, causing
	// the pre-allocation check to be bypassed.
	data := []byte{
		0x50, 0x4b, 0x06, 0x06, 0x05, 0x06, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b,

				format.mustNotBe(FormatPAX)
			} else {
				paxHdrs[paxKey] = formatPAXTime(ts)
			}
		}
		if v, ok := h.PAXRecords[paxKey]; ok && v == formatPAXTime(ts) {
			paxHdrs[paxKey] = v
		}
	}

	// Check basic fields.
	var blk block
	v7 := blk.toV7()
	ustar := blk.toUSTAR()
	gnu := blk.toGNU()
	verifyString(h.Name, len(v7.name()), "Name", paxPath)
	verifyString(h.Linkname, len(v7.linkName()), "Linkname", paxLinkpath)

Indian/Mauritius Indian/Mayotte Indian/Reunion Iran Israel Jamaica Japan Kwajalein Libya MET MST MST7MDT Mexico/BajaNorte Mexico/BajaSur Mexico/General NZ NZ-CHAT Navajo PRC PST8PDT Pacific/Apia Pacific/Auckland Pacific/Bougainville Pacific/Chatham Pacific/Chuuk Pacific/Easter Pacific/Efate Pacific/Enderbury Pacific/Fakaofo Pacific/Fiji Pacific/Funafuti Pacific/Galapagos Pacific/Gambier Pacific/Guadalcanal Pacific/Guam Pacific/Honolulu Pacific/Johnston Pacific/Kanton Pacific/Kiritimati Pacific/Kosrae Pacific/Kwajalein...

var abcd = "abcd"
var faces = "☺☻☹"
var commas = "1,2,3,4"
var dots = "1....2....3....4"

type BinOpTest struct {
	a string
	b string
	i int
}

func TestEqual(t *testing.T) {
	// Run the tests and check for allocation at the same time.
	allocs := testing.AllocsPerRun(10, func() {
		for _, tt := range compareTests {
			eql := Equal(tt.a, tt.b)
			if eql != (tt.i == 0) {
				t.Errorf(`Equal(%q, %q) = %v`, tt.a, tt.b, eql)

	}
	f.(*fileWriter).crc32 = fakeHash32{}
	chunk := make([]byte, chunkSize)
	for i := range chunk {
		chunk[i] = '.'
	}
	for i := 0; i < chunks; i++ {
		_, err := f.Write(chunk)
		if err != nil {
			t.Fatal("write chunk:", err)
		}
	}
	if frag := int(size % chunkSize); frag > 0 {
		_, err := f.Write(chunk[:frag])
		if err != nil {
			t.Fatal("write chunk:", err)
		}
	}
	end := []byte("END\n")

		if chunkMax == 0 {
			chunkMax = len(b)
		}
	}
	nb := bytealg.MakeNoZero(n)[:n:n]
	bp := copy(nb, b)
	for bp < n {
		chunk := bp
		if chunk > chunkMax {
			chunk = chunkMax
		}
		bp += copy(nb[bp:], nb[:chunk])
	}
	return nb
}

// ToUpper returns a copy of the byte slice s with all Unicode letters mapped to
// their upper case.
func ToUpper(s []byte) []byte {

func (p *Parser) atRegisterShift() bool {
	// ARM only.
	if !p.arch.InFamily(sys.ARM, sys.ARM64) {
		return false
	}
	// R1<<...
	if lex.IsRegisterShift(p.peek()) {
		return true
	}
	// R(1)<<...   Ugly check. TODO: Rethink how we handle ARM register shifts to be
	// less special.
	if p.peek() != '(' || len(p.input)-p.inputPos < 4 {
		return false
	}

		hdr, rawHdr, err := tr.readHeader()
		if err != nil {
			return nil, err
		}
		if err := tr.handleRegularFile(hdr); err != nil {
			return nil, err
		}
		format.mayOnlyBe(hdr.Format)

		// Check for PAX/GNU special headers and files.
		switch hdr.Typeflag {
		case TypeXHeader, TypeXGlobalHeader:
			format.mayOnlyBe(FormatPAX)
			paxHdrs, err = parsePAX(tr)
			if err != nil {
				return nil, err
			}