}
}

func TestRuneIO(t *testing.T) {
	const NRune = 1000
	// Built a test slice while we write the data
	b := make([]byte, utf8.UTFMax*NRune)
	var buf Buffer
	n := 0
	for r := rune(0); r < NRune; r++ {
		size := utf8.EncodeRune(b[n:], r)
		nbytes, err := buf.WriteRune(r)
		if err != nil {
			t.Fatalf("WriteRune(%U) error: %s", r, err)
		}
		if nbytes != size {

				Mode:     0666,
			},
		},
	},
	{
		Name: "utf8-7zip.zip",
		File: []ZipTestFile{
			{
				Name:     "世界",
				Content:  []byte{},
				Mode:     0666,
				Modified: time.Date(2017, 11, 6, 13, 9, 27, 867862500, timeZone(-8*time.Hour)),
			},
		},
	},
	{
		Name: "utf8-infozip.zip",
		File: []ZipTestFile{
			{
				Name:    "世界",
				Content: []byte{},

		//
		// Forbid 0x7e and 0x5c since EUC-KR and Shift-JIS replace those
		// characters with localized currency and overline characters.
		if r < 0x20 || r > 0x7d || r == 0x5c {
			if !utf8.ValidRune(r) || (r == utf8.RuneError && size == 1) {
				return false, false
			}
			require = true
		}
	}
	return true, require
}

// prepare performs the bookkeeping operations required at the start of

	case scanner.Int:
		return p.atoi(tok.String())
	case scanner.Char:
		str, err := strconv.Unquote(tok.String())
		if err != nil {
			p.errorf("%s", err)
		}
		r, w := utf8.DecodeRuneInString(str)
		if w == 1 && r == utf8.RuneError {
			p.errorf("illegal UTF-8 encoding for character constant")
		}
		return uint64(r)
	case '+':
		return +p.factor()
	case '-':
		return -p.factor()
	case '~':

				Name:       "file4",
				ModTime:    time.Unix(1400000000, 0),
				PAXRecords: map[string]string{"mtime": "1400000000"},
			}, nil},
			testClose{nil},
		},
	}, {
		file: "testdata/gnu-utf8.tar",
		tests: []testFnc{
			testHeader{Header{
				Typeflag: TypeReg,
				Name:     "☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹",
				Mode:     0644,
				Uid:      1000, Gid: 1000,
				Uname:   "☺",

The <a href="/pkg/cmd/vet"><code>go vet</code></a> tool flags certain
integer-to-string conversions as potential errors.
Library functions such as
<a href="/pkg/unicode/utf8#AppendRune"><code>utf8.AppendRune</code></a> or
<a href="/pkg/unicode/utf8#EncodeRune"><code>utf8.EncodeRune</code></a>
should be used instead.
</li>
</ol>