""" Tests for the unicodedata module.

    Written by Marc-Andre Lemburg (mal@lemburg.com).

    (c) Copyright CNRI, All Rights Reserved. NO WARRANTY.

"""

from functools import partial
import hashlib
from http.client import HTTPException
import sys
import unicodedata
import unittest
import weakref
from test.support import (
    gc_collect,
    open_urlresource,
    requires_resource,
    script_helper,
    cpython_only,
    check_disallow_instantiation,
    force_not_colorized,
    is_resource_enabled,
    findfile,
)


quicktest = not is_resource_enabled('cpu')

def iterallchars():
    maxunicode = 0xffff if quicktest else sys.maxunicode
    return map(chr, range(maxunicode + 1))


def check_version(testfile):
    hdr = testfile.readline()
    return unicodedata.unidata_version in hdr


def download_test_data_file(filename):
    TESTDATAURL = f"http://www.pythontest.net/unicode/{unicodedata.unidata_version}/{filename}"

    try:
        return open_urlresource(TESTDATAURL, encoding="utf-8", check=check_version)
    except PermissionError:
        raise unittest.SkipTest(
            f"Permission error when downloading {TESTDATAURL} "
            f"into the test data directory"
        )
    except (OSError, HTTPException) as exc:
        raise unittest.SkipTest(f"Failed to download {TESTDATAURL}: {exc}")


class UnicodeMethodsTest(unittest.TestCase):

    # update this, if the database changes
    expectedchecksum = ('47a99fa654ef1f50e89d2e9697b7b041fccb5a05'
                        if quicktest else
                        '8b2615a9fc627676cbc0b6fac0191177df97ef5f')

    def test_method_checksum(self):
        h = hashlib.sha1()
        for char in iterallchars():
            s1 = char + 'abc'
            s2 = char + 'ABC'
            s3 = char + '123'
            data = (
                # Predicates (single char)
                "01"[char.isalnum()],
                "01"[char.isalpha()],
                "01"[char.isdecimal()],
                "01"[char.isdigit()],
                "01"[char.islower()],
                "01"[char.isnumeric()],
                "01"[char.isspace()],
                "01"[char.istitle()],
                "01"[char.isupper()],

                # Predicates (multiple chars)
                "01"[s1.isalnum()],
                "01"[s1.isalpha()],
                "01"[s3.isdecimal()],
                "01"[s3.isdigit()],
                "01"[s1.islower()],
                "01"[s3.isnumeric()],
                "01"[(char + ' \t').isspace()],
                "01"[s1.istitle()],
                "01"[s2.isupper()],

                # Mappings (single char)
                char.lower(),
                char.upper(),
                char.title(),

                # Mappings (multiple chars)
                s1.lower(),
                s2.upper(),
                s1.title(),
                s2.title(),

                )
            h.update(''.join(data).encode('utf-8', 'surrogatepass'))
        result = h.hexdigest()
        self.assertEqual(result, self.expectedchecksum)


class BaseUnicodeFunctionsTest:

    def test_function_checksum(self):
        db = self.db
        data = []
        h = hashlib.sha1()

        for char in iterallchars():
            data = "%.12g%.12g%.12g%s%s%s%s%s%s%s" % (
                # Properties
                db.digit(char, -1),
                db.numeric(char, -1),
                db.decimal(char, -1),
                db.category(char),
                db.bidirectional(char),
                db.decomposition(char),
                db.mirrored(char),
                db.combining(char),
                db.east_asian_width(char),
                db.name(char, ""),
            )
            h.update(data.encode("ascii"))
        result = h.hexdigest()
        self.assertEqual(result, self.expectedchecksum)

    def test_name(self):
        name = self.db.name
        self.assertRaises(ValueError, name, '\0')
        self.assertRaises(ValueError, name, '\n')
        self.assertRaises(ValueError, name, '\x1F')
        self.assertRaises(ValueError, name, '\x7F')
        self.assertRaises(ValueError, name, '\x9F')
        self.assertRaises(ValueError, name, '\uFFFE')
        self.assertRaises(ValueError, name, '\uFFFF')
        self.assertRaises(ValueError, name, '\U0010FFFF')
        self.assertEqual(name('\U0010FFFF', 42), 42)

        self.assertEqual(name(' '), 'SPACE')
        self.assertEqual(name('1'), 'DIGIT ONE')
        self.assertEqual(name('A'), 'LATIN CAPITAL LETTER A')
        self.assertEqual(name('\xA0'), 'NO-BREAK SPACE')
        self.assertEqual(name('\u0221', None), None if self.old else
                         'LATIN SMALL LETTER D WITH CURL')
        self.assertEqual(name('\u3400'), 'CJK UNIFIED IDEOGRAPH-3400')
        self.assertEqual(name('\u9FA5'), 'CJK UNIFIED IDEOGRAPH-9FA5')
        self.assertEqual(name('\uAC00'), 'HANGUL SYLLABLE GA')
        self.assertEqual(name('\uD7A3'), 'HANGUL SYLLABLE HIH')
        self.assertEqual(name('\uF900'), 'CJK COMPATIBILITY IDEOGRAPH-F900')
        self.assertEqual(name('\uFA6A'), 'CJK COMPATIBILITY IDEOGRAPH-FA6A')
        self.assertEqual(name('\uFBF9'),
                         'ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA '
                         'ABOVE WITH ALEF MAKSURA ISOLATED FORM')
        self.assertEqual(name('\U00013460', None), None if self.old else
                         'EGYPTIAN HIEROGLYPH-13460')
        self.assertEqual(name('\U000143FA', None), None if self.old else
                         'EGYPTIAN HIEROGLYPH-143FA')
        self.assertEqual(name('\U00017000', None), None if self.old else
                         'TANGUT IDEOGRAPH-17000')
        self.assertEqual(name('\U00018B00', None), None if self.old else
                         'KHITAN SMALL SCRIPT CHARACTER-18B00')
        self.assertEqual(name('\U00018CD5', None), None if self.old else
                         'KHITAN SMALL SCRIPT CHARACTER-18CD5')
        self.assertEqual(name('\U00018CFF', None), None if self.old else
                         'KHITAN SMALL SCRIPT CHARACTER-18CFF')
        self.assertEqual(name('\U00018D1E', None), None if self.old else
                         'TANGUT IDEOGRAPH-18D1E')
        self.assertEqual(name('\U0001B170', None), None if self.old else
                         'NUSHU CHARACTER-1B170')
        self.assertEqual(name('\U0001B2FB', None), None if self.old else
                         'NUSHU CHARACTER-1B2FB')
        self.assertEqual(name('\U0001FBA8', None), None if self.old else
                         'BOX DRAWINGS LIGHT DIAGONAL UPPER CENTRE TO '
                         'MIDDLE LEFT AND MIDDLE RIGHT TO LOWER CENTRE')
        self.assertEqual(name('\U0002A6D6'), 'CJK UNIFIED IDEOGRAPH-2A6D6')
        self.assertEqual(name('\U0002FA1D'), 'CJK COMPATIBILITY IDEOGRAPH-2FA1D')
        self.assertEqual(name('\U00033479', None), None if self.old else
                         'CJK UNIFIED IDEOGRAPH-33479')

    @requires_resource('cpu')
    def test_name_inverse_lookup(self):
        for char in iterallchars():
            looked_name = self.db.name(char, None)
            if looked_name is not None:
                self.assertEqual(self.db.lookup(looked_name), char)

    def test_no_names_in_pua(self):
        puas = [*range(0xe000, 0xf8ff),
                *range(0xf0000, 0xfffff),
                *range(0x100000, 0x10ffff)]
        for i in puas:
            char = chr(i)
            self.assertRaises(ValueError, self.db.name, char)

    def test_lookup_nonexistant(self):
        # just make sure that lookup can fail
        for nonexistent in [
            "LATIN SMLL LETR A",
            "OPEN HANDS SIGHS",
            "DREGS",
            "HANDBUG",
            "MODIFIER LETTER CYRILLIC SMALL QUESTION MARK",
            "???",
            "CJK UNIFIED IDEOGRAPH-03400",
            "CJK UNIFIED IDEOGRAPH-020000",
            "CJK UNIFIED IDEOGRAPH-33FF",
            "CJK UNIFIED IDEOGRAPH-F900",
            "CJK UNIFIED IDEOGRAPH-13460",
            "CJK UNIFIED IDEOGRAPH-17000",
            "CJK UNIFIED IDEOGRAPH-18B00",
            "CJK UNIFIED IDEOGRAPH-1B170",
            "CJK COMPATIBILITY IDEOGRAPH-3400",
            "TANGUT IDEOGRAPH-3400",
            "HANGUL SYLLABLE AC00",
        ]:
            self.assertRaises(KeyError, self.db.lookup, nonexistent)

    def test_digit(self):
        self.assertEqual(self.db.digit('A', None), None)
        self.assertEqual(self.db.digit('9'), 9)
        self.assertEqual(self.db.digit('\u215b', None), None)
        self.assertEqual(self.db.digit('\u2468'), 9)
        self.assertEqual(self.db.digit('\U00020000', None), None)
        self.assertEqual(self.db.digit('\U0001D7FD'), 7)

        # New in 13.0.0
        self.assertEqual(self.db.digit('\U0001fbf9', None), 9)
        # New in 14.0.0
        self.assertEqual(self.db.digit('\U00016ac9', None), 9)
        # New in 15.0.0
        self.assertEqual(self.db.digit('\U0001e4f9', None), 9)

        self.assertRaises(TypeError, self.db.digit)
        self.assertRaises(TypeError, self.db.digit, 'xx')
        self.assertRaises(ValueError, self.db.digit, 'x')

    def test_numeric(self):
        self.assertEqual(self.db.numeric('A',None), None)
        self.assertEqual(self.db.numeric('9'), 9)
        self.assertEqual(self.db.numeric('\u215b'), 0.125)
        self.assertEqual(self.db.numeric('\u2468'), 9.0)
        self.assertEqual(self.db.numeric('\U00020000', None), None)

        # New in 4.1.0
        self.assertEqual(self.db.numeric('\U0001012A', None), None if self.old else 9000)
        # Changed in 4.1.0
        self.assertEqual(self.db.numeric('\u5793', None), 1e20 if self.old else None)
        # New in 5.0.0
        self.assertEqual(self.db.numeric('\u07c0', None), None if self.old else 0.0)
        # New in 5.1.0
        self.assertEqual(self.db.numeric('\ua627', None), None if self.old else 7.0)
        # Changed in 5.2.0
        self.assertEqual(self.db.numeric('\u09f6'), 3.0 if self.old else 3/16)
        # New in 6.0.0
        self.assertEqual(self.db.numeric('\u0b72', None), None if self.old else 0.25)
        # New in 12.0.0
        self.assertEqual(self.db.numeric('\U0001ed3c', None), None if self.old else 0.5)
        # New in 13.0.0
        self.assertEqual(self.db.numeric('\U0001fbf9', None), None if self.old else 9)
        # New in 14.0.0
        self.assertEqual(self.db.numeric('\U00016ac9', None), None if self.old else 9)
        # New in 15.0.0
        self.assertEqual(self.db.numeric('\U0001e4f9', None), None if self.old else 9)

        self.assertRaises(TypeError, self.db.numeric)
        self.assertRaises(TypeError, self.db.numeric, 'xx')
        self.assertRaises(ValueError, self.db.numeric, 'x')

    def test_decimal(self):
        self.assertEqual(self.db.decimal('A',None), None)
        self.assertEqual(self.db.decimal('9'), 9)
        self.assertEqual(self.db.decimal('\u215b', None), None)
        self.assertEqual(self.db.decimal('\u2468', None), None)
        self.assertEqual(self.db.decimal('\U00020000', None), None)
        self.assertEqual(self.db.decimal('\U0001D7FD'), 7)

        # New in 4.1.0
        self.assertEqual(self.db.decimal('\xb2', None), 2 if self.old else None)
        self.assertEqual(self.db.decimal('\u1369', None), 1 if self.old else None)
        # New in 5.0.0
        self.assertEqual(self.db.decimal('\u07c0', None), None if self.old else 0)
        # New in 13.0.0
        self.assertEqual(self.db.decimal('\U0001fbf9', None), None if self.old else 9)
        # New in 14.0.0
        self.assertEqual(self.db.decimal('\U00016ac9', None), None if self.old else 9)
        # New in 15.0.0
        self.assertEqual(self.db.decimal('\U0001e4f9', None), None if self.old else 9)

        self.assertRaises(TypeError, self.db.decimal)
        self.assertRaises(TypeError, self.db.decimal, 'xx')
        self.assertRaises(ValueError, self.db.decimal, 'x')

    def test_category(self):
        self.assertEqual(self.db.category('\uFFFE'), 'Cn')
        self.assertEqual(self.db.category('a'), 'Ll')
        self.assertEqual(self.db.category('A'), 'Lu')
        self.assertEqual(self.db.category('\U00020000'), 'Lo')

        # New in 4.1.0
        self.assertEqual(self.db.category('\U0001012A'), 'Cn' if self.old else 'No')
        self.assertEqual(self.db.category('\U000e01ef'), 'Cn' if self.old else 'Mn')
        # New in 5.1.0
        self.assertEqual(self.db.category('\u0374'), 'Sk' if self.old else 'Lm')
        # Changed in 13.0.0
        self.assertEqual(self.db.category('\u0b55'), 'Cn' if self.old else 'Mn')
        self.assertEqual(self.db.category('\U0003134a'), 'Cn' if self.old else 'Lo')
        # Changed in 14.0.0
        self.assertEqual(self.db.category('\u061d'), 'Cn' if self.old else 'Po')
        self.assertEqual(self.db.category('\U0002b738'), 'Cn' if self.old else 'Lo')
        # Changed in 15.0.0
        self.assertEqual(self.db.category('\u0cf3'), 'Cn' if self.old else 'Mc')
        self.assertEqual(self.db.category('\U000323af'), 'Cn' if self.old else 'Lo')

        self.assertRaises(TypeError, self.db.category)
        self.assertRaises(TypeError, self.db.category, 'xx')

    def test_bidirectional(self):
        self.assertEqual(self.db.bidirectional('\uFFFE'), 'BN')
        self.assertEqual(self.db.bidirectional(' '), 'WS')
        self.assertEqual(self.db.bidirectional('A'), 'L')
        self.assertEqual(self.db.bidirectional('\U00020000'), 'L')

        # New in 4.1.0
        self.assertEqual(self.db.bidirectional('+'), 'ET' if self.old else 'ES')
        self.assertEqual(self.db.bidirectional('\u0221'), '' if self.old else 'L')
        self.assertEqual(self.db.bidirectional('\U000e01ef'), '' if self.old else 'NSM')
        # New in 13.0.0
        self.assertEqual(self.db.bidirectional('\u0b55'), '' if self.old else 'NSM')
        self.assertEqual(self.db.bidirectional('\U0003134a'), '' if self.old else 'L')
        # New in 14.0.0
        self.assertEqual(self.db.bidirectional('\u061d'), '' if self.old else 'AL')
        self.assertEqual(self.db.bidirectional('\U0002b738'), '' if self.old else 'L')
        # New in 15.0.0
        self.assertEqual(self.db.bidirectional('\u0cf3'), '' if self.old else 'L')
        self.assertEqual(self.db.bidirectional('\U000323af'), '' if self.old else 'L')
        # New in 16.0.0
        self.assertEqual(self.db.bidirectional('\u0897'), '' if self.old else 'NSM')
        self.assertEqual(self.db.bidirectional('\U0001fbef'), '' if self.old else 'ON')
        # New in 17.0.0
        self.assertEqual(self.db.bidirectional('\u088f'), '' if self.old else 'AL')
        self.assertEqual(self.db.bidirectional('\U0001fbfa'), '' if self.old else 'ON')

        self.assertRaises(TypeError, self.db.bidirectional)
        self.assertRaises(TypeError, self.db.bidirectional, 'xx')

    def test_bidirectional_unassigned(self):
        if self.old:
            return
        self.assertEqual(self.db.bidirectional('\u0378'), 'L')
        self.assertEqual(self.db.bidirectional('\u077F'), 'AL')
        self.assertEqual(self.db.bidirectional('\u20CF'), 'ET')
        self.assertEqual(self.db.bidirectional('\u0590'), 'R')
        self.assertEqual(self.db.bidirectional('\uFFFF'), 'BN')
        self.assertEqual(self.db.bidirectional('\U0001FFFE'), 'BN')
        self.assertEqual(self.db.bidirectional('\U00010D01'), 'AL')

    def test_decomposition(self):
        self.assertEqual(self.db.decomposition('\uFFFE'),'')
        self.assertEqual(self.db.decomposition('\u00bc'), '<fraction> 0031 2044 0034')

        # New in 4.1.0
        self.assertEqual(self.db.decomposition('\u03f9'), '' if self.old else '<compat> 03A3')
        # New in 13.0.0
        self.assertEqual(self.db.decomposition('\uab69'), '' if self.old else '<super> 028D')
        self.assertEqual(self.db.decomposition('\U00011938'), '' if self.old else '11935 11930')
        self.assertEqual(self.db.decomposition('\U0001fbf9'), '' if self.old else '<font> 0039')
        # New in 14.0.0
        self.assertEqual(self.db.decomposition('\ua7f2'), '' if self.old else '<super> 0043')
        self.assertEqual(self.db.decomposition('\U000107ba'), '' if self.old else '<super> 1DF1E')
        # New in 15.0.0
        self.assertEqual(self.db.decomposition('\U0001e06d'), '' if self.old else '<super> 04B1')
        # New in 16.0.0
        self.assertEqual(self.db.decomposition('\U0001CCD6'), '' if self.old else '<font> 0041')
        # New in 17.0.0
        self.assertEqual(self.db.decomposition('\uA7F1'), '' if self.old else '<super> 0053')

        # Hangul characters
        self.assertEqual(self.db.decomposition('\uAC00'), '1100 1161')
        self.assertEqual(self.db.decomposition('\uD4DB'), '1111 1171 11B6')
        self.assertEqual(self.db.decomposition('\uC2F8'), '110A 1161')
        self.assertEqual(self.db.decomposition('\uD7A3'), '1112 1175 11C2')

        self.assertRaises(TypeError, self.db.decomposition)
        self.assertRaises(TypeError, self.db.decomposition, 'xx')

    def test_mirrored(self):
        self.assertEqual(self.db.mirrored('\uFFFE'), 0)
        self.assertEqual(self.db.mirrored('a'), 0)
        self.assertEqual(self.db.mirrored('\u2201'), 1)
        self.assertEqual(self.db.mirrored('\U00020000'), 0)

        # New in 5.0.0
        self.assertEqual(self.db.mirrored('\u0f3a'), 0 if self.old else 1)
        self.assertEqual(self.db.mirrored('\U0001d7c3'), 0 if self.old else 1)
        # New in 11.0.0
        self.assertEqual(self.db.mirrored('\u29a1'), 1 if self.old else 0)
        # New in 14.0.0
        self.assertEqual(self.db.mirrored('\u2e5c'), 0 if self.old else 1)
        # New in 16.0.0
        self.assertEqual(self.db.mirrored('\u226D'), 0 if self.old else 1)

        self.assertRaises(TypeError, self.db.mirrored)
        self.assertRaises(TypeError, self.db.mirrored, 'xx')

    def test_combining(self):
        self.assertEqual(self.db.combining('\uFFFE'), 0)
        self.assertEqual(self.db.combining('a'), 0)
        self.assertEqual(self.db.combining('\u20e1'), 230)
        self.assertEqual(self.db.combining('\U00020000'), 0)

        # New in 4.1.0
        self.assertEqual(self.db.combining('\u0350'), 0 if self.old else 230)
        # New in 9.0.0
        self.assertEqual(self.db.combining('\U0001e94a'), 0 if self.old else 7)
        # New in 13.0.0
        self.assertEqual(self.db.combining('\u1abf'), 0 if self.old else 220)
        self.assertEqual(self.db.combining('\U00016ff1'), 0 if self.old else 6)
        # New in 14.0.0
        self.assertEqual(self.db.combining('\u0c3c'), 0 if self.old else 7)
        self.assertEqual(self.db.combining('\U0001e2ae'), 0 if self.old else 230)
        # New in 15.0.0
        self.assertEqual(self.db.combining('\U00010efd'), 0 if self.old else 220)
        # New in 16.0.0
        self.assertEqual(self.db.combining('\u0897'), 0 if self.old else 230)
        # New in 17.0.0
        self.assertEqual(self.db.combining('\u1ACF'), 0 if self.old else 230)

        self.assertRaises(TypeError, self.db.combining)
        self.assertRaises(TypeError, self.db.combining, 'xx')

    def test_normalization(self):
        # Test normalize() and is_normalized()
        def check(ch, expected):
            if isinstance(expected, str):
                expected = [expected]*4
            forms = ('NFC', 'NFD', 'NFKC', 'NFKD')
            result = [self.db.normalize(form, ch) for form in forms]
            self.assertEqual(ascii(result), ascii(list(expected)))
            self.assertEqual([self.db.is_normalized(form, ch) for form in forms],
                             [ch == y for x, y in zip(result, expected)])

        check('', '')
        check('A', 'A')
        check(' ', ' ')
        check('\U0010ffff', '\U0010ffff')
        check('abc', 'abc')
        # Broken in 4.0.0
        check('\u0340', '\u0300')
        check('\u0300', '\u0300')
        check('\U0002fa1d', '\U0002a600')
        check('\U0002a600', '\U0002a600')
        check('\u0344', '\u0308\u0301')
        check('\u0308\u0301', '\u0308\u0301')
        # Broken in 4.0.0 and 4.0.1
        check('\U0001d1bc', '\U0001d1ba\U0001d165')
        check('\U0001d1ba\U0001d165', '\U0001d1ba\U0001d165')
        check('\ufb2c', '\u05e9\u05bc\u05c1')
        check('\u05e9\u05bc\u05c1', '\u05e9\u05bc\u05c1')
        check('\U0001d1c0', '\U0001d1ba\U0001d165\U0001d16f')
        check('\U0001d1ba\U0001d165\U0001d16f', '\U0001d1ba\U0001d165\U0001d16f')

        # Broken in 4.0.0
        check('\xa0', ['\xa0', '\xa0', ' ', ' '])
        check('\u2003', ['\u2003', '\u2003', ' ', ' '])
        check('\U0001d7ff', ['\U0001d7ff', '\U0001d7ff', '9', '9'])

        check('\xa8', ['\xa8', '\xa8', ' \u0308', ' \u0308'])
        check(' \u0308', ' \u0308')

        check('\xc0', ['\xc0', 'A\u0300']*2)
        check('A\u0300', ['\xc0', 'A\u0300']*2)

        check('\ud7a3', ['\ud7a3', '\u1112\u1175\u11c2']*2)
        check('\u1112\u1175\u11c2', ['\ud7a3', '\u1112\u1175\u11c2']*2)

        check('\xb4', ['\xb4', '\xb4', ' \u0301', ' \u0301'])
        check('\u1ffd', ['\xb4', '\xb4', ' \u0301', ' \u0301'])
        check(' \u0301', ' \u0301')

        check('\xc5', ['\xc5', 'A\u030a']*2)
        check('\u212b', ['\xc5', 'A\u030a']*2)
        check('A\u030a', ['\xc5', 'A\u030a']*2)

        check('\u1f71', ['\u03ac', '\u03b1\u0301']*2)
        check('\u03ac', ['\u03ac', '\u03b1\u0301']*2)
        check('\u03b1\u0301', ['\u03ac', '\u03b1\u0301']*2)

        check('\u01c4', ['\u01c4', '\u01c4', 'D\u017d', 'DZ\u030c'])
        check('D\u017d', ['D\u017d', 'DZ\u030c']*2)
        check('DZ\u030c', ['D\u017d', 'DZ\u030c']*2)

        check('\u1fed', ['\u1fed', '\xa8\u0300', ' \u0308\u0300', ' \u0308\u0300'])
        check('\xa8\u0300', ['\u1fed', '\xa8\u0300', ' \u0308\u0300', ' \u0308\u0300'])
        check(' \u0308\u0300', ' \u0308\u0300')

        check('\u326e', ['\u326e', '\u326e', '\uac00', '\u1100\u1161'])
        check('\u320e', ['\u320e', '\u320e', '(\uac00)', '(\u1100\u1161)'])
        check('(\uac00)', ['(\uac00)', '(\u1100\u1161)']*2)
        check('(\u1100\u1161)', ['(\uac00)', '(\u1100\u1161)']*2)

        check('\u0385', ['\u0385', '\xa8\u0301', ' \u0308\u0301', ' \u0308\u0301'])
        check('\u1fee', ['\u0385', '\xa8\u0301', ' \u0308\u0301', ' \u0308\u0301'])
        check('\xa8\u0301', ['\u0385', '\xa8\u0301', ' \u0308\u0301', ' \u0308\u0301'])
        check(' \u0308\u0301', ' \u0308\u0301')

        check('\u1fdf', ['\u1fdf', '\u1ffe\u0342', ' \u0314\u0342', ' \u0314\u0342'])
        check('\u1ffe\u0342', ['\u1fdf', '\u1ffe\u0342', ' \u0314\u0342', ' \u0314\u0342'])
        check('\u1ffe', ['\u1ffe', '\u1ffe', ' \u0314', ' \u0314'])
        check(' \u0314\u0342', ' \u0314\u0342')

        check('\u03d3', ['\u03d3', '\u03d2\u0301', '\u038e', '\u03a5\u0301'])
        check('\u03d2\u0301', ['\u03d3', '\u03d2\u0301', '\u038e', '\u03a5\u0301'])
        check('\u038e', ['\u038e', '\u03a5\u0301']*2)
        check('\u1feb', ['\u038e', '\u03a5\u0301']*2)
        check('\u03a5\u0301', ['\u038e', '\u03a5\u0301']*2)

        check('\u0626', ['\u0626', '\u064a\u0654']*2)
        check('\u064a\u0654', ['\u0626', '\u064a\u0654']*2)
        check('\ufe89', ['\ufe89', '\ufe89', '\u0626', '\u064a\u0654'])
        check('\ufe8a', ['\ufe8a', '\ufe8a', '\u0626', '\u064a\u0654'])
        check('\ufe8b', ['\ufe8b', '\ufe8b', '\u0626', '\u064a\u0654'])
        check('\ufe8c', ['\ufe8c', '\ufe8c', '\u0626', '\u064a\u0654'])

        check('\ufef9', ['\ufef9', '\ufef9', '\u0644\u0625', '\u0644\u0627\u0655'])
        check('\ufefa', ['\ufefa', '\ufefa', '\u0644\u0625', '\u0644\u0627\u0655'])
        check('\ufefb', ['\ufefb', '\ufefb', '\u0644\u0627', '\u0644\u0627'])
        check('\ufefc', ['\ufefc', '\ufefc', '\u0644\u0627', '\u0644\u0627'])
        check('\u0644\u0625', ['\u0644\u0625', '\u0644\u0627\u0655']*2)
        check('\u0644\u0627\u0655', ['\u0644\u0625', '\u0644\u0627\u0655']*2)
        check('\u0644\u0627', '\u0644\u0627')

        # Broken in 4.0.0
        check('\u327c', '\u327c' if self.old else
              ['\u327c', '\u327c', '\ucc38\uace0', '\u110e\u1161\u11b7\u1100\u1169'])
        check('\ucc38\uace0', ['\ucc38\uace0', '\u110e\u1161\u11b7\u1100\u1169']*2)
        check('\ucc38', ['\ucc38', '\u110e\u1161\u11b7']*2)
        check('\u110e\u1161\u11b7\u1100\u1169',
              ['\ucc38\uace0', '\u110e\u1161\u11b7\u1100\u1169']*2)
        check('\u110e\u1161\u11b7\u1100',
              ['\ucc38\u1100', '\u110e\u1161\u11b7\u1100']*2)
        check('\u110e\u1161\u11b7',
              ['\ucc38', '\u110e\u1161\u11b7']*2)
        check('\u110e\u1161',
              ['\ucc28', '\u110e\u1161']*2)
        check('\u110e', '\u110e')
        # Broken in 4.0.0-12.0.0
        check('\U00011938', '\U00011938' if self.old else
              ['\U00011938', '\U00011935\U00011930']*2)
        check('\U00011935\U00011930', ['\U00011938', '\U00011935\U00011930']*2)
        # New in 4.0.1
        check('\u321d', '\u321d' if self.old else
              ['\u321d', '\u321d', '(\uc624\uc804)', '(\u110b\u1169\u110c\u1165\u11ab)'])
        check('(\uc624\uc804)',
              ['(\uc624\uc804)', '(\u110b\u1169\u110c\u1165\u11ab)']*2)
        check('(\u110b\u1169\u110c\u1165\u11ab)',
              ['(\uc624\uc804)', '(\u110b\u1169\u110c\u1165\u11ab)']*2)
        check('\u4d57', '\u4d57')
        check('\u45d7', '\u45d7' if self.old else '\u45d7')
        check('\U0002f9bf', '\u4d57' if self.old else '\u45d7')
        # New in 4.1.0
        check('\u03a3', '\u03a3')
        check('\u03f9', '\u03f9' if self.old else
              ['\u03f9', '\u03f9', '\u03a3', '\u03a3'])
        # New in 5.0.0
        check('\u1b06', '\u1b06' if self.old else ['\u1b06', '\u1b05\u1b35']*2)
        # New in 5.2.0
        check('\U0001f213', '\U0001f213' if self.old else
                ['\U0001f213', '\U0001f213', '\u30c7', '\u30c6\u3099'])
        # New in 6.1.0
        check('\ufa2e', '\ufa2e' if self.old else '\u90de')
        # New in 13.0.0
        check('\U00011938', '\U00011938' if self.old else
                ['\U00011938', '\U00011935\U00011930', '\U00011938', '\U00011935\U00011930'])
        check('\U0001fbf9', '\U0001fbf9' if self.old else
                ['\U0001fbf9', '\U0001fbf9', '9', '9'])
        # New in 14.0.0
        check('\U000107ba', '\U000107ba' if self.old else
                ['\U000107ba', '\U000107ba', '\U0001df1e', '\U0001df1e'])
        # New in 15.0.0
        check('\U0001e06d', '\U0001e06d' if self.old else
                ['\U0001e06d', '\U0001e06d', '\u04b1', '\u04b1'])
        # New in 16.0.0
        check('\U0001ccd6', '\U0001ccd6' if self.old else
              ['\U0001ccd6', '\U0001ccd6', 'A', 'A'])

        self.assertRaises(TypeError, self.db.normalize)
        self.assertRaises(TypeError, self.db.normalize, 'NFC')
        self.assertRaises(ValueError, self.db.normalize, 'SPAM', 'A')

        self.assertRaises(TypeError, self.db.is_normalized)
        self.assertRaises(TypeError, self.db.is_normalized, 'NFC')
        self.assertRaises(ValueError, self.db.is_normalized, 'SPAM', 'A')

    def test_pr29(self):
        # https://www.unicode.org/review/pr-29.html
        # See issues #1054943 and #10254.
        composed = ("\u0b47\u0300\u0b3e", "\u1100\u0300\u1161",
                    'Li\u030dt-s\u1e73\u0301',
                    '\u092e\u093e\u0930\u094d\u0915 \u091c\u093c'
                    + '\u0941\u0915\u0947\u0930\u092c\u0930\u094d\u0917',
                    '\u0915\u093f\u0930\u094d\u0917\u093f\u091c\u093c'
                    + '\u0938\u094d\u0924\u093e\u0928')
        for text in composed:
            self.assertEqual(self.db.normalize('NFC', text), text)

    def test_issue10254(self):
        # Crash reported in #10254
        # New in 4.1.0
        a = 'C\u0338' * 20  + 'C\u0327'
        b = 'C\u0338' * 20  + '\xC7'
        self.assertEqual(self.db.normalize('NFC', a), b)

    def test_long_combining_mark_run(self):
        # gh-149079: avoid quadratic canonical ordering.
        payload = "a" + ("\u0300\u0327" * 32)
        nfd = "a" + ("\u0327" * 32) + ("\u0300" * 32)
        nfc = "\u00e0" + ("\u0327" * 32) + ("\u0300" * 31)

        self.assertEqual(self.db.normalize("NFD", payload), nfd)
        self.assertEqual(self.db.normalize("NFKD", payload), nfd)
        self.assertEqual(self.db.normalize("NFC", payload), nfc)
        self.assertEqual(self.db.normalize("NFKC", payload), nfc)

    def test_combining_mark_run_fast_paths(self):
        # gh-149079: cover short runs and already-sorted long runs.
        short_payload = "a" + ("\u0300\u0327" * 9) + "\u0300"
        short_nfd = "a" + ("\u0327" * 9) + ("\u0300" * 10)
        short_nfc = "\u00e0" + ("\u0327" * 9) + ("\u0300" * 9)
        long_sorted = "a" + ("\u0327" * 30) + ("\u0300" * 30)
        long_sorted_nfc = "\u00e0" + ("\u0327" * 30) + ("\u0300" * 29)

        self.assertEqual(self.db.normalize("NFD", short_payload), short_nfd)
        self.assertEqual(self.db.normalize("NFKD", short_payload), short_nfd)
        self.assertEqual(self.db.normalize("NFC", short_payload), short_nfc)
        self.assertEqual(self.db.normalize("NFKC", short_payload), short_nfc)
        self.assertEqual(self.db.normalize("NFD", long_sorted), long_sorted)
        self.assertEqual(self.db.normalize("NFKD", long_sorted), long_sorted)
        self.assertEqual(self.db.normalize("NFC", long_sorted), long_sorted_nfc)
        self.assertEqual(self.db.normalize("NFKC", long_sorted), long_sorted_nfc)

    def test_issue29456(self):
        # Fix #29456
        u1176_str_a = '\u1100\u1176\u11a8'
        u1176_str_b = '\u1100\u1176\u11a8'
        u11a7_str_a = '\u1100\u1175\u11a7'
        u11a7_str_b = '\uae30\u11a7'
        u11c3_str_a = '\u1100\u1175\u11c3'
        u11c3_str_b = '\uae30\u11c3'
        self.assertEqual(self.db.normalize('NFC', u1176_str_a), u1176_str_b)
        # New in 4.1.0
        self.assertEqual(self.db.normalize('NFC', u11a7_str_a), u11a7_str_b)
        self.assertEqual(self.db.normalize('NFC', u11c3_str_a), u11c3_str_b)

    def test_east_asian_width(self):
        eaw = self.db.east_asian_width
        self.assertRaises(TypeError, eaw, b'a')
        self.assertRaises(TypeError, eaw, bytearray())
        self.assertRaises(TypeError, eaw, '')
        self.assertRaises(TypeError, eaw, 'ra')
        self.assertEqual(eaw('\x1e'), 'N')
        self.assertEqual(eaw('\x20'), 'Na')
        self.assertEqual(eaw('\uC894'), 'W')
        self.assertEqual(eaw('\uFF66'), 'H')
        self.assertEqual(eaw('\uFF1F'), 'F')
        self.assertEqual(eaw('\u2010'), 'A')
        self.assertEqual(eaw('\U00020000'), 'W')

        # New in 4.1.0
        self.assertEqual(eaw('\u0350'), 'N' if self.old else 'A')
        self.assertEqual(eaw('\U000e01ef'), 'N' if self.old else 'A')
        # New in 5.2.0
        self.assertEqual(eaw('\u115a'), 'N' if self.old else 'W')
        # New in 9.0.0
        self.assertEqual(eaw('\u231a'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\u2614'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0001f19a'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0001f991'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0001f9c0'), 'N' if self.old else 'W')
        # New in 12.0.0
        self.assertEqual(eaw('\u32ff'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0001fa95'), 'N' if self.old else 'W')
        # New in 13.0.0
        self.assertEqual(eaw('\u31bb'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0003134a'), 'N' if self.old else 'W')
        # New in 14.0.0
        self.assertEqual(eaw('\u9ffd'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0002b738'), 'N' if self.old else 'W')
        # New in 15.0.0
        self.assertEqual(eaw('\U000323af'), 'N' if self.old else 'W')
        # New in 16.0.0
        self.assertEqual(eaw('\u2630'), 'N' if self.old else 'W')
        self.assertEqual(eaw('\U0001FAE9'), 'N' if self.old else 'W')
        # New in 17.0.0
        self.assertEqual(eaw('\U00016FF2'), 'N' if self.old else 'W')

    def test_east_asian_width_unassigned(self):
        eaw = self.db.east_asian_width
        # unassigned
        for char in '\u0530\u0ecf\u10c6\u20fc\uaaca\U000107bd\U000115f2':
            self.assertEqual(eaw(char), 'N')
            self.assertIs(self.db.name(char, None), None)

        # unassigned but reserved for CJK
        for char in ('\U0002A6E0\U0002FA20\U0003134B\U0003FFFD'
                     '\uFA6E\uFADA'): # New in 5.2.0
            self.assertEqual(eaw(char), 'W')
            self.assertIs(self.db.name(char, None), None)

        # private use areas
        for char in '\uE000\uF800\U000F0000\U000FFFEE\U00100000\U0010FFF0':
            self.assertEqual(eaw(char), 'A')
            self.assertIs(self.db.name(char, None), None)

class UnicodeFunctionsTest(unittest.TestCase, BaseUnicodeFunctionsTest):
    db = unicodedata
    old = False

    # Update this if the database changes. Make sure to do a full rebuild
    # (e.g. 'make distclean && make') to get the correct checksum.
    expectedchecksum = ('00b13fa975a60b1d3f490f1fc8c126ab24990c75'
                        if quicktest else
                        'ebfc9dd281c2226998fd435744dd2e9321899beb')

    @requires_resource('network')
    def test_all_names(self):
        TESTDATAFILE = "DerivedName.txt"
        testdata = download_test_data_file(TESTDATAFILE)

        with testdata:
            self.run_name_tests(testdata)

    def run_name_tests(self, testdata):
        names_ref = {}

        def parse_cp(s):
            return int(s, 16)

        # Parse data
        for line in testdata:
            line = line.strip()
            if not line or line.startswith("#"):
                continue
            raw_cp, name = line.split("; ")
            # Check for a range
            if ".." in raw_cp:
                cp1, cp2 = map(parse_cp, raw_cp.split(".."))
                # remove ‘*’ at the end
                assert name[-1] == '*', (raw_cp, name)
                name = name[:-1]
                for cp in range(cp1, cp2 + 1):
                    names_ref[cp] = f"{name}{cp:04X}"
            elif name[-1] == '*':
                cp = parse_cp(raw_cp)
                name = name[:-1]
                names_ref[cp] = f"{name}{cp:04X}"
            else:
                assert '*' not in name, (raw_cp, name)
                cp = parse_cp(raw_cp)
                names_ref[cp] = name

        for cp in range(0, sys.maxunicode + 1):
            self.assertEqual(self.db.name(chr(cp), None), names_ref.get(cp))

    def test_isxidstart(self):
        self.assertTrue(self.db.isxidstart('S'))
        self.assertTrue(self.db.isxidstart('\u0AD0'))  # GUJARATI OM
        self.assertTrue(self.db.isxidstart('\u0EC6'))  # LAO KO LA
        self.assertTrue(self.db.isxidstart('\u17DC'))  # KHMER SIGN AVAKRAHASANYA
        self.assertTrue(self.db.isxidstart('\uA015'))  # YI SYLLABLE WU
        self.assertTrue(self.db.isxidstart('\uFE7B'))  # ARABIC KASRA MEDIAL FORM

        self.assertFalse(self.db.isxidstart(' '))
        self.assertFalse(self.db.isxidstart('0'))
        self.assertRaises(TypeError, self.db.isxidstart)
        self.assertRaises(TypeError, self.db.isxidstart, 'xx')

    def test_isxidcontinue(self):
        self.assertTrue(self.db.isxidcontinue('S'))
        self.assertTrue(self.db.isxidcontinue('_'))
        self.assertTrue(self.db.isxidcontinue('0'))
        self.assertTrue(self.db.isxidcontinue('\u00BA'))  # MASCULINE ORDINAL INDICATOR
        self.assertTrue(self.db.isxidcontinue('\u0640'))  # ARABIC TATWEEL
        self.assertTrue(self.db.isxidcontinue('\u0710'))  # SYRIAC LETTER ALAPH
        self.assertTrue(self.db.isxidcontinue('\u0B3E'))  # ORIYA VOWEL SIGN AA
        self.assertTrue(self.db.isxidcontinue('\u17D7'))  # KHMER SIGN LEK TOO

        self.assertFalse(self.db.isxidcontinue(' '))
        self.assertRaises(TypeError, self.db.isxidcontinue)
        self.assertRaises(TypeError, self.db.isxidcontinue, 'xx')

    def test_grapheme_cluster_break(self):
        gcb = self.db.grapheme_cluster_break
        self.assertEqual(gcb(' '), 'Other')
        self.assertEqual(gcb('x'), 'Other')
        self.assertEqual(gcb('\U0010FFFF'), 'Other')
        self.assertEqual(gcb('\r'), 'CR')
        self.assertEqual(gcb('\n'), 'LF')
        self.assertEqual(gcb('\0'), 'Control')
        self.assertEqual(gcb('\t'), 'Control')
        self.assertEqual(gcb('\x1F'), 'Control')
        self.assertEqual(gcb('\x7F'), 'Control')
        self.assertEqual(gcb('\x9F'), 'Control')
        self.assertEqual(gcb('\U000E0001'), 'Control')
        self.assertEqual(gcb('\u0300'), 'Extend')
        self.assertEqual(gcb('\u200C'), 'Extend')
        self.assertEqual(gcb('\U000E01EF'), 'Extend')
        self.assertEqual(gcb('\u1159'), 'L')
        self.assertEqual(gcb('\u11F9'), 'T')
        self.assertEqual(gcb('\uD788'), 'LV')
        self.assertEqual(gcb('\uD7A3'), 'LVT')
        # New in 5.0.0
        self.assertEqual(gcb('\u05BA'), 'Extend')
        self.assertEqual(gcb('\u20EF'), 'Extend')
        # New in 5.1.0
        self.assertEqual(gcb('\u2064'), 'Control')
        self.assertEqual(gcb('\uAA4D'), 'SpacingMark')
        # New in 5.2.0
        self.assertEqual(gcb('\u0816'), 'Extend')
        self.assertEqual(gcb('\uA97C'), 'L')
        self.assertEqual(gcb('\uD7C6'), 'V')
        self.assertEqual(gcb('\uD7FB'), 'T')
        # New in 6.0.0
        self.assertEqual(gcb('\u093A'), 'Extend')
        self.assertEqual(gcb('\U00011002'), 'SpacingMark')
        # New in 6.1.0
        self.assertEqual(gcb('\U000E0FFF'), 'Control')
        self.assertEqual(gcb('\U00016F7E'), 'SpacingMark')
        # New in 6.2.0
        self.assertEqual(gcb('\U0001F1E6'), 'Regional_Indicator')
        self.assertEqual(gcb('\U0001F1FF'), 'Regional_Indicator')
        # New in 6.3.0
        self.assertEqual(gcb('\u180E'), 'Control')
        self.assertEqual(gcb('\u1A1B'), 'Extend')
        # New in 7.0.0
        self.assertEqual(gcb('\u0E33'), 'SpacingMark')
        self.assertEqual(gcb('\u0EB3'), 'SpacingMark')
        self.assertEqual(gcb('\U0001BCA3'), 'Control')
        self.assertEqual(gcb('\U0001E8D6'), 'Extend')
        self.assertEqual(gcb('\U0001163E'), 'SpacingMark')
        # New in 8.0.0
        self.assertEqual(gcb('\u08E3'), 'Extend')
        self.assertEqual(gcb('\U00011726'), 'SpacingMark')
        # New in 9.0.0
        self.assertEqual(gcb('\u0600'), 'Prepend')
        self.assertEqual(gcb('\U000E007F'), 'Extend')
        self.assertEqual(gcb('\U00011CB4'), 'SpacingMark')
        self.assertEqual(gcb('\u200D'), 'ZWJ')
        # New in 10.0.0
        self.assertEqual(gcb('\U00011D46'), 'Prepend')
        self.assertEqual(gcb('\U00011D47'), 'Extend')
        self.assertEqual(gcb('\U00011A97'), 'SpacingMark')
        # New in 11.0.0
        self.assertEqual(gcb('\U000110CD'), 'Prepend')
        self.assertEqual(gcb('\u07FD'), 'Extend')
        self.assertEqual(gcb('\U00011EF6'), 'SpacingMark')
        # New in 12.0.0
        self.assertEqual(gcb('\U00011A84'), 'Prepend')
        self.assertEqual(gcb('\U00013438'), 'Control')
        self.assertEqual(gcb('\U0001E2EF'), 'Extend')
        self.assertEqual(gcb('\U00016F87'), 'SpacingMark')
        # New in 13.0.0
        self.assertEqual(gcb('\U00011941'), 'Prepend')
        self.assertEqual(gcb('\U00016FE4'), 'Extend')
        self.assertEqual(gcb('\U00011942'), 'SpacingMark')
        # New in 14.0.0
        self.assertEqual(gcb('\u0891'), 'Prepend')
        self.assertEqual(gcb('\U0001E2AE'), 'Extend')
        # New in 15.0.0
        self.assertEqual(gcb('\U00011F02'), 'Prepend')
        self.assertEqual(gcb('\U0001343F'), 'Control')
        self.assertEqual(gcb('\U0001E4EF'), 'Extend')
        self.assertEqual(gcb('\U00011F3F'), 'SpacingMark')
        # New in 16.0.0
        self.assertEqual(gcb('\U000113D1'), 'Prepend')
        self.assertEqual(gcb('\U0001E5EF'), 'Extend')
        self.assertEqual(gcb('\U0001612C'), 'SpacingMark')
        self.assertEqual(gcb('\U00016D63'), 'V')
        # New in 17.0.0
        self.assertEqual(gcb('\u1AEB'), 'Extend')
        self.assertEqual(gcb('\U00011B67'), 'SpacingMark')

        self.assertRaises(TypeError, gcb)
        self.assertRaises(TypeError, gcb, b'x')
        self.assertRaises(TypeError, gcb, 120)
        self.assertRaises(TypeError, gcb, '')
        self.assertRaises(TypeError, gcb, 'xx')

    def test_indic_conjunct_break(self):
        incb = self.db.indic_conjunct_break
        self.assertEqual(incb(' '), 'None')
        self.assertEqual(incb('x'), 'None')
        self.assertEqual(incb('\U0010FFFF'), 'None')
        # New in 15.1.0
        self.assertEqual(incb('\u094D'), 'Linker')
        self.assertEqual(incb('\u0D4D'), 'Linker')
        self.assertEqual(incb('\u0915'), 'Consonant')
        self.assertEqual(incb('\u0D3A'), 'Consonant')
        self.assertEqual(incb('\u0300'), 'Extend')
        self.assertEqual(incb('\U0001E94A'), 'Extend')
        # New in 16.0.0
        self.assertEqual(incb('\u034F'), 'Extend')
        self.assertEqual(incb('\U000E01EF'), 'Extend')
        # New in 17.0.0
        self.assertEqual(incb('\u1039'), 'Linker')
        self.assertEqual(incb('\U00011F42'), 'Linker')
        self.assertEqual(incb('\u1000'), 'Consonant')
        self.assertEqual(incb('\U00011F33'), 'Consonant')
        self.assertEqual(incb('\U0001E6F5'), 'Extend')

        self.assertRaises(TypeError, incb)
        self.assertRaises(TypeError, incb, b'x')
        self.assertRaises(TypeError, incb, 120)
        self.assertRaises(TypeError, incb, '')
        self.assertRaises(TypeError, incb, 'xx')

    def test_extended_pictographic(self):
        ext_pict = self.db.extended_pictographic
        self.assertIs(ext_pict(' '), False)
        self.assertIs(ext_pict('x'), False)
        self.assertIs(ext_pict('\U0010FFFF'), False)
        # New in 13.0.0
        self.assertIs(ext_pict('\xA9'), True)
        self.assertIs(ext_pict('\u203C'), True)
        self.assertIs(ext_pict('\U0001FAD6'), True)
        self.assertIs(ext_pict('\U0001FFFD'), True)
        # New in 17.0.0
        self.assertIs(ext_pict('\u2388'), False)
        self.assertIs(ext_pict('\U0001FA6D'), False)

        self.assertRaises(TypeError, ext_pict)
        self.assertRaises(TypeError, ext_pict, b'x')
        self.assertRaises(TypeError, ext_pict, 120)
        self.assertRaises(TypeError, ext_pict, '')
        self.assertRaises(TypeError, ext_pict, 'xx')

    def test_grapheme_break(self):
        def graphemes(*args):
            return list(map(str, self.db.iter_graphemes(*args)))

        self.assertRaises(TypeError, self.db.iter_graphemes)
        self.assertRaises(TypeError, self.db.iter_graphemes, b'x')
        self.assertRaises(TypeError, self.db.iter_graphemes, 'x', 0, 0, 0)

        self.assertEqual(graphemes(''), [])
        self.assertEqual(graphemes('abcd'), ['a', 'b', 'c', 'd'])
        self.assertEqual(graphemes('abcd', 1), ['b', 'c', 'd'])
        self.assertEqual(graphemes('abcd', 1, 3), ['b', 'c'])
        self.assertEqual(graphemes('abcd', -3), ['b', 'c', 'd'])
        self.assertEqual(graphemes('abcd', 1, -1), ['b', 'c'])
        self.assertEqual(graphemes('abcd', 3, 1), [])
        self.assertEqual(graphemes('abcd', 5), [])
        self.assertEqual(graphemes('abcd', 0, 5), ['a', 'b', 'c', 'd'])
        self.assertEqual(graphemes('abcd', -5), ['a', 'b', 'c', 'd'])
        self.assertEqual(graphemes('abcd', 0, -5), [])
        # GB3
        self.assertEqual(graphemes('\r\n'), ['\r\n'])
        # GB4
        self.assertEqual(graphemes('\r\u0308'), ['\r', '\u0308'])
        self.assertEqual(graphemes('\n\u0308'), ['\n', '\u0308'])
        self.assertEqual(graphemes('\0\u0308'), ['\0', '\u0308'])
        # GB5
        self.assertEqual(graphemes('\u06dd\r'), ['\u06dd', '\r'])
        self.assertEqual(graphemes('\u06dd\n'), ['\u06dd', '\n'])
        self.assertEqual(graphemes('\u06dd\0'), ['\u06dd', '\0'])
        # GB6
        self.assertEqual(graphemes('\u1100\u1160'), ['\u1100\u1160'])
        self.assertEqual(graphemes('\u1100\uAC00'), ['\u1100\uAC00'])
        self.assertEqual(graphemes('\u1100\uAC01'), ['\u1100\uAC01'])
        # GB7
        self.assertEqual(graphemes('\uAC00\u1160'), ['\uAC00\u1160'])
        self.assertEqual(graphemes('\uAC00\u11A8'), ['\uAC00\u11A8'])
        self.assertEqual(graphemes('\u1160\u1160'), ['\u1160\u1160'])
        self.assertEqual(graphemes('\u1160\u11A8'), ['\u1160\u11A8'])
        # GB8
        self.assertEqual(graphemes('\uAC01\u11A8'), ['\uAC01\u11A8'])
        self.assertEqual(graphemes('\u11A8\u11A8'), ['\u11A8\u11A8'])
        # GB9
        self.assertEqual(graphemes('a\u0300'), ['a\u0300'])
        self.assertEqual(graphemes('a\u200D'), ['a\u200D'])
        # GB9a
        self.assertEqual(graphemes('\u0905\u0903'), ['\u0905\u0903'])
        # GB9b
        self.assertEqual(graphemes('\u06dd\u0661'), ['\u06dd\u0661'])
        # GB9c
        self.assertEqual(graphemes('\u0915\u094d\u0924'),
                         ['\u0915\u094d\u0924'])
        self.assertEqual(graphemes('\u0915\u094D\u094D\u0924'),
                         ['\u0915\u094D\u094D\u0924'])
        self.assertEqual(graphemes('\u0915\u094D\u0924\u094D\u092F'),
                         ['\u0915\u094D\u0924\u094D\u092F'])
        # GB11
        self.assertEqual(graphemes(
                '\U0001F9D1\U0001F3FE\u200D\u2764\uFE0F'
                '\u200D\U0001F48B\u200D\U0001F9D1\U0001F3FC'),
                ['\U0001F9D1\U0001F3FE\u200D\u2764\uFE0F'
                '\u200D\U0001F48B\u200D\U0001F9D1\U0001F3FC'])
        # GB12
        self.assertEqual(graphemes(
            '\U0001F1FA\U0001F1E6\U0001F1FA\U0001F1F3'),
            ['\U0001F1FA\U0001F1E6', '\U0001F1FA\U0001F1F3'])
        # GB13
        self.assertEqual(graphemes(
            'a\U0001F1FA\U0001F1E6\U0001F1FA\U0001F1F3'),
            ['a', '\U0001F1FA\U0001F1E6', '\U0001F1FA\U0001F1F3'])

    def test_block(self):
        self.assertEqual(self.db.block('\u0000'), 'Basic Latin')
        self.assertEqual(self.db.block('\u0041'), 'Basic Latin')
        self.assertEqual(self.db.block('\u007F'), 'Basic Latin')
        self.assertEqual(self.db.block('\u0080'), 'Latin-1 Supplement')
        self.assertEqual(self.db.block('\u00FF'), 'Latin-1 Supplement')
        self.assertEqual(self.db.block('\u1159'), 'Hangul Jamo')
        self.assertEqual(self.db.block('\u11F9'), 'Hangul Jamo')
        self.assertEqual(self.db.block('\uD788'), 'Hangul Syllables')
        self.assertEqual(self.db.block('\uD7A3'), 'Hangul Syllables')
        # New in 5.0.0
        self.assertEqual(self.db.block('\u05BA'), 'Hebrew')
        self.assertEqual(self.db.block('\u20EF'), 'Combining Diacritical Marks for Symbols')
        # New in 5.1.0
        self.assertEqual(self.db.block('\u2064'), 'General Punctuation')
        self.assertEqual(self.db.block('\uAA4D'), 'Cham')
        # New in 5.2.0
        self.assertEqual(self.db.block('\u0816'), 'Samaritan')
        self.assertEqual(self.db.block('\uA97C'), 'Hangul Jamo Extended-A')
        self.assertEqual(self.db.block('\uD7C6'), 'Hangul Jamo Extended-B')
        self.assertEqual(self.db.block('\uD7FB'), 'Hangul Jamo Extended-B')
        # New in 6.0.0
        self.assertEqual(self.db.block('\u093A'), 'Devanagari')
        self.assertEqual(self.db.block('\U00011002'), 'Brahmi')
        # New in 6.1.0
        self.assertEqual(self.db.block('\U000E0FFF'), 'No_Block')
        self.assertEqual(self.db.block('\U00016F7E'), 'Miao')
        # New in 6.2.0
        self.assertEqual(self.db.block('\U0001F1E6'), 'Enclosed Alphanumeric Supplement')
        self.assertEqual(self.db.block('\U0001F1FF'), 'Enclosed Alphanumeric Supplement')
        # New in 6.3.0
        self.assertEqual(self.db.block('\u180E'), 'Mongolian')
        self.assertEqual(self.db.block('\u1A1B'), 'Buginese')
        # New in 7.0.0
        self.assertEqual(self.db.block('\u0E33'), 'Thai')
        self.assertEqual(self.db.block('\u0EB3'), 'Lao')
        self.assertEqual(self.db.block('\U0001BCA3'), 'Shorthand Format Controls')
        self.assertEqual(self.db.block('\U0001E8D6'), 'Mende Kikakui')
        self.assertEqual(self.db.block('\U0001163E'), 'Modi')
        # New in 8.0.0
        self.assertEqual(self.db.block('\u08E3'), 'Arabic Extended-A')
        self.assertEqual(self.db.block('\U00011726'), 'Ahom')
        # New in 9.0.0
        self.assertEqual(self.db.block('\u0600'), 'Arabic')
        self.assertEqual(self.db.block('\U000E007F'), 'Tags')
        self.assertEqual(self.db.block('\U00011CB4'), 'Marchen')
        self.assertEqual(self.db.block('\u200D'), 'General Punctuation')
        # New in 10.0.0
        self.assertEqual(self.db.block('\U00011D46'), 'Masaram Gondi')
        self.assertEqual(self.db.block('\U00011D47'), 'Masaram Gondi')
        self.assertEqual(self.db.block('\U00011A97'), 'Soyombo')
        # New in 11.0.0
        self.assertEqual(self.db.block('\U000110CD'), 'Kaithi')
        self.assertEqual(self.db.block('\u07FD'), 'NKo')
        self.assertEqual(self.db.block('\U00011EF6'), 'Makasar')
        # New in 12.0.0
        self.assertEqual(self.db.block('\U00011A84'), 'Soyombo')
        self.assertEqual(self.db.block('\U00013438'), 'Egyptian Hieroglyph Format Controls')
        self.assertEqual(self.db.block('\U0001E2EF'), 'Wancho')
        self.assertEqual(self.db.block('\U00016F87'), 'Miao')
        # New in 13.0.0
        self.assertEqual(self.db.block('\U00011941'), 'Dives Akuru')
        self.assertEqual(self.db.block('\U00016FE4'), 'Ideographic Symbols and Punctuation')
        self.assertEqual(self.db.block('\U00011942'), 'Dives Akuru')
        # New in 14.0.0
        self.assertEqual(self.db.block('\u0891'), 'Arabic Extended-B')
        self.assertEqual(self.db.block('\U0001E2AE'), 'Toto')
        # New in 15.0.0
        self.assertEqual(self.db.block('\U00011F02'), 'Kawi')
        self.assertEqual(self.db.block('\U0001343F'), 'Egyptian Hieroglyph Format Controls')
        self.assertEqual(self.db.block('\U0001E4EF'), 'Nag Mundari')
        self.assertEqual(self.db.block('\U00011F3F'), 'Kawi')
        # New in 16.0.0
        self.assertEqual(self.db.block('\U000113D1'), 'Tulu-Tigalari')
        self.assertEqual(self.db.block('\U0001E5EF'), 'Ol Onal')
        self.assertEqual(self.db.block('\U0001612C'), 'Gurung Khema')
        self.assertEqual(self.db.block('\U00016D63'), 'Kirat Rai')
        # New in 17.0.0
        self.assertEqual(self.db.block('\u1AEB'), 'Combining Diacritical Marks Extended')
        self.assertEqual(self.db.block('\U00011B67'), 'Sharada Supplement')
        # Unassigned
        self.assertEqual(self.db.block('\U00100000'), 'Supplementary Private Use Area-B')
        self.assertEqual(self.db.block('\U0010FFFF'), 'Supplementary Private Use Area-B')

    def test_block_invalid_input(self):
        self.assertRaises(TypeError, self.db.block)
        self.assertRaises(TypeError, self.db.block, b'x')
        self.assertRaises(TypeError, self.db.block, 120)
        self.assertRaises(TypeError, self.db.block, '')
        self.assertRaises(TypeError, self.db.block, 'xx')


class Unicode_3_2_0_FunctionsTest(unittest.TestCase, BaseUnicodeFunctionsTest):
    db = unicodedata.ucd_3_2_0
    old = True
    expectedchecksum = ('cb5bbbd1f55b67371e18222b90a8e21c87f16b72'
                        if quicktest else
                        '74936dffe949d99203a47e6a66565b2fc337bae7')


class UnicodeMiscTest(unittest.TestCase):
    db = unicodedata

    @cpython_only
    def test_disallow_instantiation(self):
        # Ensure that the type disallows instantiation (bpo-43916)
        check_disallow_instantiation(self, unicodedata.UCD)

    @force_not_colorized
    def test_failed_import_during_compiling(self):
        # Issue 4367
        # Decoding \N escapes requires the unicodedata module. If it can't be
        # imported, we shouldn't segfault.

        # This program should raise a SyntaxError in the eval.
        code = "import sys;" \
            "sys.modules['unicodedata'] = None;" \
            """eval("'\\\\N{SOFT HYPHEN}'")"""
        # We use a separate process because the unicodedata module may already
        # have been loaded in this process.
        result = script_helper.assert_python_failure("-c", code)
        error = "SyntaxError: (unicode error) \\N escapes not supported " \
            "(can't load unicodedata module)"
        self.assertIn(error, result.err.decode("ascii"))

    def test_unicodedata_unload_reload(self):
        # gh-149449: dropping unicodedata and running gc must not leave the
        # cached _ucnhash_CAPI pointer dangling.
        code = (
            "import gc, sys\n"
            "assert '\\N{GRINNING FACE}'.encode("
            "    'ascii', errors='namereplace') == b'\\\\N{GRINNING FACE}'\n"
            "compile(r\"x = '\\\\N{LATIN CAPITAL LETTER A}'\", '<x>', 'exec')\n"
            "del sys.modules['unicodedata']\n"
            "gc.collect()\n"
            "assert '\\N{WINKING FACE}'.encode("
            "    'ascii', errors='namereplace') == b'\\\\N{WINKING FACE}'\n"
            "compile(r\"x = '\\\\N{LATIN CAPITAL LETTER B}'\", '<x>', 'exec')\n"
        )
        script_helper.assert_python_ok("-c", code)

    def test_decimal_numeric_consistent(self):
        # Test that decimal and numeric are consistent,
        # i.e. if a character has a decimal value,
        # its numeric value should be the same.
        count = 0
        for c in iterallchars():
            dec = self.db.decimal(c, -1)
            if dec != -1:
                self.assertEqual(dec, self.db.numeric(c))
                count += 1
        self.assertTrue(count >= 10, count) # should have tested at least the ASCII digits

    def test_digit_numeric_consistent(self):
        # Test that digit and numeric are consistent,
        # i.e. if a character has a digit value,
        # its numeric value should be the same.
        count = 0
        for c in iterallchars():
            dec = self.db.digit(c, -1)
            if dec != -1:
                self.assertEqual(dec, self.db.numeric(c))
                count += 1
        self.assertTrue(count >= 10, count) # should have tested at least the ASCII digits

    def test_normalize_consistent(self):
        allchars = list(iterallchars())
        for form in ('NFC', 'NFD', 'NFKC', 'NFKD'):
            for c in allchars:
                norm = self.db.normalize(form, c)
                self.assertEqual(self.db.is_normalized(form, c), norm == c)
                if norm != c:
                    self.assertEqual(self.db.normalize(form, norm), norm)
                    self.assertTrue(self.db.is_normalized(form, norm))

    def test_bug_1704793(self):
        self.assertEqual(self.db.lookup("GOTHIC LETTER FAIHU"), '\U00010346')

    def test_ucd_510(self):
        # In UCD 5.1.0, a mirrored property changed wrt. UCD 3.2.0
        self.assertTrue(unicodedata.mirrored("\u0f3a"))
        self.assertTrue(not unicodedata.ucd_3_2_0.mirrored("\u0f3a"))
        # Also, we now have two ways of representing
        # the upper-case mapping: as delta, or as absolute value
        self.assertTrue("a".upper()=='A')
        self.assertTrue("\u1d79".upper()=='\ua77d')
        self.assertTrue(".".upper()=='.')

    @requires_resource('cpu')
    def test_bug_5828(self):
        self.assertEqual("\u1d79".lower(), "\u1d79")
        # Only U+0000 should have U+0000 as its upper/lower/titlecase variant
        self.assertEqual(
            [
                c for c in iterallchars()
                if "\x00" in (c.lower(), c.upper(), c.title())
            ],
            ["\x00"]
        )

    def test_bug_4971(self):
        # LETTER DZ WITH CARON: DZ, Dz, dz
        self.assertEqual("\u01c4".title(), "\u01c5")
        self.assertEqual("\u01c5".title(), "\u01c5")
        self.assertEqual("\u01c6".title(), "\u01c5")

    def test_linebreak_7643(self):
        for c in iterallchars():
            lines = (c + 'A').splitlines()
            if c in ('\x0a', '\x0b', '\x0c', '\x0d', '\x85',
                     '\x1c', '\x1d', '\x1e', '\u2028', '\u2029'):
                self.assertEqual(len(lines), 2,
                                 r"%a should be a linebreak" % c)
            else:
                self.assertEqual(len(lines), 1,
                                 r"%a should not be a linebreak" % c)

    def test_segment_object(self):
        segments = list(unicodedata.iter_graphemes('spa\u0300m'))
        self.assertEqual(len(segments), 4, segments)
        segment = segments[2]
        self.assertEqual(segment.start, 2)
        self.assertEqual(segment.end, 4)
        self.assertEqual(str(segment), 'a\u0300')
        self.assertEqual(repr(segment), '<Segment 2:4>')
        self.assertRaises(TypeError, iter, segment)
        self.assertRaises(TypeError, len, segment)


class NormalizationTest(unittest.TestCase):
    @staticmethod
    def unistr(data):
        data = [int(x, 16) for x in data.split(" ")]
        return "".join([chr(x) for x in data])

    @requires_resource('network')
    @requires_resource('cpu')
    def test_normalization(self):
        TESTDATAFILE = "NormalizationTest.txt"
        testdata = download_test_data_file(TESTDATAFILE)

        with testdata:
            self.run_normalization_tests(testdata, unicodedata)

    @requires_resource('cpu')
    def test_normalization_3_2_0(self):
        testdatafile = findfile('NormalizationTest-3.2.0.txt')
        with open(testdatafile, encoding='utf-8') as testdata:
            self.run_normalization_tests(testdata, unicodedata.ucd_3_2_0)

    def run_normalization_tests(self, testdata, ucd):
        part = None
        part1_data = set()

        NFC = partial(ucd.normalize, "NFC")
        NFKC = partial(ucd.normalize, "NFKC")
        NFD = partial(ucd.normalize, "NFD")
        NFKD = partial(ucd.normalize, "NFKD")
        is_normalized = ucd.is_normalized

        for line in testdata:
            if '#' in line:
                line = line.split('#')[0]
            line = line.strip()
            if not line:
                continue
            if line.startswith("@Part"):
                part = line.split()[0]
                continue
            c1,c2,c3,c4,c5 = [self.unistr(x) for x in line.split(';')[:-1]]

            # Perform tests
            self.assertTrue(c2 ==  NFC(c1) ==  NFC(c2) ==  NFC(c3), line)
            self.assertTrue(c4 ==  NFC(c4) ==  NFC(c5), line)
            self.assertTrue(c3 ==  NFD(c1) ==  NFD(c2) ==  NFD(c3), line)
            self.assertTrue(c5 ==  NFD(c4) ==  NFD(c5), line)
            self.assertTrue(c4 == NFKC(c1) == NFKC(c2) == \
                            NFKC(c3) == NFKC(c4) == NFKC(c5),
                            line)
            self.assertTrue(c5 == NFKD(c1) == NFKD(c2) == \
                            NFKD(c3) == NFKD(c4) == NFKD(c5),
                            line)

            self.assertTrue(is_normalized("NFC", c2))
            self.assertTrue(is_normalized("NFC", c4))

            self.assertTrue(is_normalized("NFD", c3))
            self.assertTrue(is_normalized("NFD", c5))

            self.assertTrue(is_normalized("NFKC", c4))
            self.assertTrue(is_normalized("NFKD", c5))

            # Record part 1 data
            if part == "@Part1":
                part1_data.add(c1)

        # Perform tests for all other data
        for X in iterallchars():
            if X in part1_data:
                continue
            self.assertTrue(X == NFC(X) == NFD(X) == NFKC(X) == NFKD(X), ord(X))

    def test_edge_cases(self):
        self.assertRaises(TypeError, unicodedata.normalize)
        self.assertRaises(ValueError, unicodedata.normalize, 'unknown', 'xx')
        self.assertEqual(unicodedata.normalize('NFKC', ''), '')

    def test_bug_834676(self):
        # Check for bug 834676
        unicodedata.normalize('NFC', '\ud55c\uae00')

    def test_normalize_return_type(self):
        # gh-129569: normalize() return type must always be str
        normalize = unicodedata.normalize

        class MyStr(str):
            pass

        normalization_forms = ("NFC", "NFKC", "NFD", "NFKD")
        input_strings = (
            # normalized strings
            "",
            "ascii",
            # unnormalized strings
            "\u1e0b\u0323",
            "\u0071\u0307\u0323",
        )

        for form in normalization_forms:
            for input_str in input_strings:
                with self.subTest(form=form, input_str=input_str):
                    self.assertIs(type(normalize(form, input_str)), str)
                    self.assertIs(type(normalize(form, MyStr(input_str))), str)


class GraphemeBreakTest(unittest.TestCase):
    @requires_resource('network')
    def test_grapheme_break(self):
        TESTDATAFILE = "GraphemeBreakTest.txt"
        testdata = download_test_data_file(TESTDATAFILE)

        with testdata:
            self.run_grapheme_break_tests(testdata)

    def run_grapheme_break_tests(self, testdata):
        for line in testdata:
            line, _, comment = line.partition('#')
            line = line.strip()
            if not line:
                continue
            comment = comment.strip()

            chunks = []
            breaks = []
            pos = 0
            for field in line.replace('×', ' ').split():
                if field == '÷':
                    chunks.append('')
                    breaks.append(pos)
                else:
                    chunks[-1] += chr(int(field, 16))
                    pos += 1
            self.assertEqual(chunks.pop(), '', line)
            input = ''.join(chunks)
            with self.subTest(line):
                result = list(unicodedata.iter_graphemes(input))
                self.assertEqual(list(map(str, result)), chunks, comment)
                self.assertEqual([x.start for x in result], breaks[:-1], comment)
                self.assertEqual([x.end for x in result], breaks[1:], comment)
                for i in range(1, len(breaks) - 1):
                    result = list(unicodedata.iter_graphemes(input, breaks[i]))
                    self.assertEqual(list(map(str, result)), chunks[i:], comment)
                    self.assertEqual([x.start for x in result], breaks[i:-1], comment)
                    self.assertEqual([x.end for x in result], breaks[i+1:], comment)

    def test_reference_loops(self):
        # Test that reference loops involving GraphemeBreakIterator or
        # Segment can be broken by the garbage collector.
        class S(str):
            pass

        s = S('abc')
        s.ref = unicodedata.iter_graphemes(s)
        wr = weakref.ref(s)
        del s
        self.assertIsNotNone(wr())
        gc_collect()
        self.assertIsNone(wr())

        s = S('abc')
        s.ref = next(unicodedata.iter_graphemes(s))
        wr = weakref.ref(s)
        del s
        self.assertIsNotNone(wr())
        gc_collect()
        self.assertIsNone(wr())


if __name__ == "__main__":
    unittest.main()