Lib/test/test_unicodedata.py

""" Tests for the unicodedata module.

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

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

"""

import hashlib
from http.client import HTTPException
import sys
import unicodedata
import unittest
from test.support import (open_urlresource, requires_resource, script_helper,
                          cpython_only, check_disallow_instantiation)


class UnicodeMethodsTest(unittest.TestCase):

    # update this, if the database changes
    expectedchecksum = 'fbdf8106a3c7c242086b0a9efa03ad4d30d5b85d'

    @requires_resource('cpu')
    def test_method_checksum(self):
        h = hashlib.sha1()
        for i in range(sys.maxunicode + 1):
            char = chr(i)
            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"[(char + 'abc').isalnum()],
                "01"[(char + 'abc').isalpha()],
                "01"[(char + '123').isdecimal()],
                "01"[(char + '123').isdigit()],
                "01"[(char + 'abc').islower()],
                "01"[(char + '123').isnumeric()],
                "01"[(char + ' \t').isspace()],
                "01"[(char + 'abc').istitle()],
                "01"[(char + 'ABC').isupper()],

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

                # Mappings (multiple chars)
                (char + 'abc').lower(),
                (char + 'ABC').upper(),
                (char + 'abc').title(),
                (char + 'ABC').title(),

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

class UnicodeDatabaseTest(unittest.TestCase):
    db = unicodedata

class UnicodeFunctionsTest(UnicodeDatabaseTest):

    # Update this if the database changes. Make sure to do a full rebuild
    # (e.g. 'make distclean && make') to get the correct checksum.
    expectedchecksum = 'd1e37a2854df60ac607b47b51189b9bf1b54bfdb'

    @requires_resource('cpu')
    def test_function_checksum(self):
        data = []
        h = hashlib.sha1()

        for i in range(sys.maxunicode + 1):
            char = chr(i)
            data = [
                # Properties
                format(self.db.digit(char, -1), '.12g'),
                format(self.db.numeric(char, -1), '.12g'),
                format(self.db.decimal(char, -1), '.12g'),
                self.db.category(char),
                self.db.bidirectional(char),
                self.db.decomposition(char),
                str(self.db.mirrored(char)),
                str(self.db.combining(char)),
            ]
            h.update(''.join(data).encode("ascii"))
        result = h.hexdigest()
        self.assertEqual(result, self.expectedchecksum)

    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)

        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('\ua627'), 7.0)
        self.assertEqual(self.db.numeric('\U00020000', None), None)
        self.assertEqual(self.db.numeric('\U0001012A'), 9000)

        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)

        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')
        self.assertEqual(self.db.category('\U0001012A'), 'No')

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

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

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

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

        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)

        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)

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

    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
        a = 'C\u0338' * 20  + 'C\u0327'
        b = 'C\u0338' * 20  + '\xC7'
        self.assertEqual(self.db.normalize('NFC', a), b)

    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)
        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')

    def test_east_asian_width_9_0_changes(self):
        self.assertEqual(self.db.ucd_3_2_0.east_asian_width('\u231a'), 'N')
        self.assertEqual(self.db.east_asian_width('\u231a'), 'W')

class UnicodeMiscTest(UnicodeDatabaseTest):

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

    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_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 i in range(0x10000):
            c = chr(i)
            dec = self.db.decimal(c, -1)
            if dec != -1:
                self.assertEqual(dec, self.db.numeric(c))
                count += 1
        self.assertTrue(count >= 10) # 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 i in range(0x10000):
            c = chr(i)
            dec = self.db.digit(c, -1)
            if dec != -1:
                self.assertEqual(dec, self.db.numeric(c))
                count += 1
        self.assertTrue(count >= 10) # should have tested at least the ASCII digits

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

    def test_ucd_510(self):
        import unicodedata
        # 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()=='.')

    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 range(sys.maxunicode+1)
                if "\x00" in chr(c).lower()+chr(c).upper()+chr(c).title()
            ],
            [0]
        )

    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 i in range(0x10000):
            lines = (chr(i) + 'A').splitlines()
            if i in (0x0a, 0x0b, 0x0c, 0x0d, 0x85,
                     0x1c, 0x1d, 0x1e, 0x2028, 0x2029):
                self.assertEqual(len(lines), 2,
                                 r"\u%.4x should be a linebreak" % i)
            else:
                self.assertEqual(len(lines), 1,
                                 r"\u%.4x should not be a linebreak" % i)

class NormalizationTest(unittest.TestCase):
    @staticmethod
    def check_version(testfile):
        hdr = testfile.readline()
        return unicodedata.unidata_version in hdr

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

    @requires_resource('network')
    def test_normalization(self):
        TESTDATAFILE = "NormalizationTest.txt"
        TESTDATAURL = f"http://www.pythontest.net/unicode/{unicodedata.unidata_version}/{TESTDATAFILE}"

        # Hit the exception early
        try:
            testdata = open_urlresource(TESTDATAURL, encoding="utf-8",
                                        check=self.check_version)
        except PermissionError:
            self.skipTest(f"Permission error when downloading {TESTDATAURL} "
                          f"into the test data directory")
        except (OSError, HTTPException):
            self.fail(f"Could not retrieve {TESTDATAURL}")

        with testdata:
            self.run_normalization_tests(testdata)

    def run_normalization_tests(self, testdata):
        part = None
        part1_data = {}

        def NFC(str):
            return unicodedata.normalize("NFC", str)

        def NFKC(str):
            return unicodedata.normalize("NFKC", str)

        def NFD(str):
            return unicodedata.normalize("NFD", str)

        def NFKD(str):
            return unicodedata.normalize("NFKD", str)

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

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

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

            # Record part 1 data
            if part == "@Part1":
                part1_data[c1] = 1

        # Perform tests for all other data
        for c in range(sys.maxunicode+1):
            X = chr(c)
            if X in part1_data:
                continue
            self.assertTrue(X == NFC(X) == NFD(X) == NFKC(X) == NFKD(X), c)

    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')


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