enc = "Shift_JIS";
        assertEquals("Shift_JIS", encodingHelper.normalize(enc));

        enc = "S-JIS";
        assertEquals("S-JIS", encodingHelper.normalize(enc));
    }

    public void test_normalize_map() {
        String enc;

        encodingHelper.addEncodingMapping("S-JIS", "Shift_JIS");

        enc = "UTF-8";
        assertEquals("UTF-8", encodingHelper.normalize(enc));

			comment: "in the 世界",
			flags:   0x808,
		},
		{
			name:    "the replacement rune is �",
			comment: "the replacement rune is �",
			flags:   0x808,
		},
		{
			// Name is Japanese encoded in Shift JIS.
			name:    "\x93\xfa\x96{\x8c\xea.txt",
			comment: "in the 世界",
			flags:   0x008, // UTF-8 must not be set
		},
	}

	// write a zip file
	buf := new(bytes.Buffer)
	w := NewWriter(buf)

		// local character encoding. Most encoding are compatible with a large
		// subset of CP-437, which itself is ASCII-like.
		//
		// 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
			}

		// Some ZIP writers use UTF-8 encoding without setting the UTF-8 flag.
		// Since it is impossible to always distinguish valid UTF-8 from some
		// other encoding (e.g., GBK or Shift-JIS), we trust the flag.
		f.NonUTF8 = f.Flags&0x800 == 0
	}

	needUSize := f.UncompressedSize == ^uint32(0)
	needCSize := f.CompressedSize == ^uint32(0)
	needHeaderOffset := f.headerOffset == int64(^uint32(0))

				Mode:    0644,
				// Name is valid UTF-8, but format does not have UTF-8 flag set.
				// We don't do UTF-8 detection for multi-byte runes due to
				// false-positives with other encodings (e.g., Shift-JIS).
				// Format says encoding is not UTF-8, so we trust it.
				NonUTF8:  true,
				Modified: time.Date(2017, 11, 6, 13, 9, 27, 0, timeZone(-8*time.Hour)),
			},
		},
	},
	{
		Name: "utf8-osx.zip",

["ant", "apie", "ar", "arba", "aš", "be", "bei", "bet", "bus", "būti", "būtų", "buvo", "dėl", "gali", "į", "iki", "ir", "iš", "ja", "ją", "jai", "jais", "jam", "jame", "jas", "jei", "ji", "jį", "jie", "jiedu", "jiedvi", "jiedviem", "jiedviese", "jiems", "jis", "jo", "jodviem", "jog", "joje", "jomis", "joms", "jos", "jose", "jų", "judu", "judvi", "judviejų", "jųdviejų", "judviem", "judviese", "jumis", "jums", "jumyse", "juo", "juodu", "juodviese", "juos", "juose", "jus", "jūs", "jūsų", "ką", "kad", "kai",...