Lib/test/test_uuid.py

import unittest.mock
from test import support
import builtins
import contextlib
import copy
import io
import os
import pickle
import shutil
import subprocess
import sys
import weakref
from unittest import mock

py_uuid = support.import_fresh_module('uuid', blocked=['_uuid'])
c_uuid = support.import_fresh_module('uuid', fresh=['_uuid'])


def importable(name):
    try:
        __import__(name)
        return True
    except:
        return False


class BaseTestUUID:
    uuid = None

    def test_UUID(self):
        equal = self.assertEqual
        ascending = []
        for (string, curly, hex, bytes, bytes_le, fields, integer, urn,
             time, clock_seq, variant, version) in [
            ('00000000-0000-0000-0000-000000000000',
             '{00000000-0000-0000-0000-000000000000}',
             '00000000000000000000000000000000',
             b'\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0',
             b'\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0',
             (0, 0, 0, 0, 0, 0),
             0,
             'urn:uuid:00000000-0000-0000-0000-000000000000',
             0, 0, self.uuid.RESERVED_NCS, None),
            ('00010203-0405-0607-0809-0a0b0c0d0e0f',
             '{00010203-0405-0607-0809-0a0b0c0d0e0f}',
             '000102030405060708090a0b0c0d0e0f',
             b'\0\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\x0d\x0e\x0f',
             b'\x03\x02\x01\0\x05\x04\x07\x06\x08\t\n\x0b\x0c\x0d\x0e\x0f',
             (0x00010203, 0x0405, 0x0607, 8, 9, 0x0a0b0c0d0e0f),
             0x000102030405060708090a0b0c0d0e0f,
             'urn:uuid:00010203-0405-0607-0809-0a0b0c0d0e0f',
             0x607040500010203, 0x809, self.uuid.RESERVED_NCS, None),
            ('02d9e6d5-9467-382e-8f9b-9300a64ac3cd',
             '{02d9e6d5-9467-382e-8f9b-9300a64ac3cd}',
             '02d9e6d59467382e8f9b9300a64ac3cd',
             b'\x02\xd9\xe6\xd5\x94\x67\x38\x2e\x8f\x9b\x93\x00\xa6\x4a\xc3\xcd',
             b'\xd5\xe6\xd9\x02\x67\x94\x2e\x38\x8f\x9b\x93\x00\xa6\x4a\xc3\xcd',
             (0x02d9e6d5, 0x9467, 0x382e, 0x8f, 0x9b, 0x9300a64ac3cd),
             0x02d9e6d59467382e8f9b9300a64ac3cd,
             'urn:uuid:02d9e6d5-9467-382e-8f9b-9300a64ac3cd',
             0x82e946702d9e6d5, 0xf9b, self.uuid.RFC_4122, 3),
            ('12345678-1234-5678-1234-567812345678',
             '{12345678-1234-5678-1234-567812345678}',
             '12345678123456781234567812345678',
             b'\x12\x34\x56\x78'*4,
             b'\x78\x56\x34\x12\x34\x12\x78\x56\x12\x34\x56\x78\x12\x34\x56\x78',
             (0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678),
             0x12345678123456781234567812345678,
             'urn:uuid:12345678-1234-5678-1234-567812345678',
             0x678123412345678, 0x1234, self.uuid.RESERVED_NCS, None),
            ('6ba7b810-9dad-11d1-80b4-00c04fd430c8',
             '{6ba7b810-9dad-11d1-80b4-00c04fd430c8}',
             '6ba7b8109dad11d180b400c04fd430c8',
             b'\x6b\xa7\xb8\x10\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             b'\x10\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             (0x6ba7b810, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8),
             0x6ba7b8109dad11d180b400c04fd430c8,
             'urn:uuid:6ba7b810-9dad-11d1-80b4-00c04fd430c8',
             0x1d19dad6ba7b810, 0xb4, self.uuid.RFC_4122, 1),
            ('6ba7b811-9dad-11d1-80b4-00c04fd430c8',
             '{6ba7b811-9dad-11d1-80b4-00c04fd430c8}',
             '6ba7b8119dad11d180b400c04fd430c8',
             b'\x6b\xa7\xb8\x11\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             b'\x11\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             (0x6ba7b811, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8),
             0x6ba7b8119dad11d180b400c04fd430c8,
             'urn:uuid:6ba7b811-9dad-11d1-80b4-00c04fd430c8',
             0x1d19dad6ba7b811, 0xb4, self.uuid.RFC_4122, 1),
            ('6ba7b812-9dad-11d1-80b4-00c04fd430c8',
             '{6ba7b812-9dad-11d1-80b4-00c04fd430c8}',
             '6ba7b8129dad11d180b400c04fd430c8',
             b'\x6b\xa7\xb8\x12\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             b'\x12\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             (0x6ba7b812, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8),
             0x6ba7b8129dad11d180b400c04fd430c8,
             'urn:uuid:6ba7b812-9dad-11d1-80b4-00c04fd430c8',
             0x1d19dad6ba7b812, 0xb4, self.uuid.RFC_4122, 1),
            ('6ba7b814-9dad-11d1-80b4-00c04fd430c8',
             '{6ba7b814-9dad-11d1-80b4-00c04fd430c8}',
             '6ba7b8149dad11d180b400c04fd430c8',
             b'\x6b\xa7\xb8\x14\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             b'\x14\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
             (0x6ba7b814, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8),
             0x6ba7b8149dad11d180b400c04fd430c8,
             'urn:uuid:6ba7b814-9dad-11d1-80b4-00c04fd430c8',
             0x1d19dad6ba7b814, 0xb4, self.uuid.RFC_4122, 1),
            ('7d444840-9dc0-11d1-b245-5ffdce74fad2',
             '{7d444840-9dc0-11d1-b245-5ffdce74fad2}',
             '7d4448409dc011d1b2455ffdce74fad2',
             b'\x7d\x44\x48\x40\x9d\xc0\x11\xd1\xb2\x45\x5f\xfd\xce\x74\xfa\xd2',
             b'\x40\x48\x44\x7d\xc0\x9d\xd1\x11\xb2\x45\x5f\xfd\xce\x74\xfa\xd2',
             (0x7d444840, 0x9dc0, 0x11d1, 0xb2, 0x45, 0x5ffdce74fad2),
             0x7d4448409dc011d1b2455ffdce74fad2,
             'urn:uuid:7d444840-9dc0-11d1-b245-5ffdce74fad2',
             0x1d19dc07d444840, 0x3245, self.uuid.RFC_4122, 1),
            ('e902893a-9d22-3c7e-a7b8-d6e313b71d9f',
             '{e902893a-9d22-3c7e-a7b8-d6e313b71d9f}',
             'e902893a9d223c7ea7b8d6e313b71d9f',
             b'\xe9\x02\x89\x3a\x9d\x22\x3c\x7e\xa7\xb8\xd6\xe3\x13\xb7\x1d\x9f',
             b'\x3a\x89\x02\xe9\x22\x9d\x7e\x3c\xa7\xb8\xd6\xe3\x13\xb7\x1d\x9f',
             (0xe902893a, 0x9d22, 0x3c7e, 0xa7, 0xb8, 0xd6e313b71d9f),
             0xe902893a9d223c7ea7b8d6e313b71d9f,
             'urn:uuid:e902893a-9d22-3c7e-a7b8-d6e313b71d9f',
             0xc7e9d22e902893a, 0x27b8, self.uuid.RFC_4122, 3),
            ('eb424026-6f54-4ef8-a4d0-bb658a1fc6cf',
             '{eb424026-6f54-4ef8-a4d0-bb658a1fc6cf}',
             'eb4240266f544ef8a4d0bb658a1fc6cf',
             b'\xeb\x42\x40\x26\x6f\x54\x4e\xf8\xa4\xd0\xbb\x65\x8a\x1f\xc6\xcf',
             b'\x26\x40\x42\xeb\x54\x6f\xf8\x4e\xa4\xd0\xbb\x65\x8a\x1f\xc6\xcf',
             (0xeb424026, 0x6f54, 0x4ef8, 0xa4, 0xd0, 0xbb658a1fc6cf),
             0xeb4240266f544ef8a4d0bb658a1fc6cf,
             'urn:uuid:eb424026-6f54-4ef8-a4d0-bb658a1fc6cf',
             0xef86f54eb424026, 0x24d0, self.uuid.RFC_4122, 4),
            ('f81d4fae-7dec-11d0-a765-00a0c91e6bf6',
             '{f81d4fae-7dec-11d0-a765-00a0c91e6bf6}',
             'f81d4fae7dec11d0a76500a0c91e6bf6',
             b'\xf8\x1d\x4f\xae\x7d\xec\x11\xd0\xa7\x65\x00\xa0\xc9\x1e\x6b\xf6',
             b'\xae\x4f\x1d\xf8\xec\x7d\xd0\x11\xa7\x65\x00\xa0\xc9\x1e\x6b\xf6',
             (0xf81d4fae, 0x7dec, 0x11d0, 0xa7, 0x65, 0x00a0c91e6bf6),
             0xf81d4fae7dec11d0a76500a0c91e6bf6,
             'urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6',
             0x1d07decf81d4fae, 0x2765, self.uuid.RFC_4122, 1),
            ('fffefdfc-fffe-fffe-fffe-fffefdfcfbfa',
             '{fffefdfc-fffe-fffe-fffe-fffefdfcfbfa}',
             'fffefdfcfffefffefffefffefdfcfbfa',
             b'\xff\xfe\xfd\xfc\xff\xfe\xff\xfe\xff\xfe\xff\xfe\xfd\xfc\xfb\xfa',
             b'\xfc\xfd\xfe\xff\xfe\xff\xfe\xff\xff\xfe\xff\xfe\xfd\xfc\xfb\xfa',
             (0xfffefdfc, 0xfffe, 0xfffe, 0xff, 0xfe, 0xfffefdfcfbfa),
             0xfffefdfcfffefffefffefffefdfcfbfa,
             'urn:uuid:fffefdfc-fffe-fffe-fffe-fffefdfcfbfa',
             0xffefffefffefdfc, 0x3ffe, self.uuid.RESERVED_FUTURE, None),
            ('ffffffff-ffff-ffff-ffff-ffffffffffff',
             '{ffffffff-ffff-ffff-ffff-ffffffffffff}',
             'ffffffffffffffffffffffffffffffff',
             b'\xff'*16,
             b'\xff'*16,
             (0xffffffff, 0xffff, 0xffff, 0xff, 0xff, 0xffffffffffff),
             0xffffffffffffffffffffffffffffffff,
             'urn:uuid:ffffffff-ffff-ffff-ffff-ffffffffffff',
             0xfffffffffffffff, 0x3fff, self.uuid.RESERVED_FUTURE, None),
            ]:
            equivalents = []
            # Construct each UUID in several different ways.
            for u in [self.uuid.UUID(string), self.uuid.UUID(curly), self.uuid.UUID(hex),
                      self.uuid.UUID(bytes=bytes), self.uuid.UUID(bytes_le=bytes_le),
                      self.uuid.UUID(fields=fields), self.uuid.UUID(int=integer),
                      self.uuid.UUID(urn)]:
                # Test all conversions and properties of the UUID object.
                equal(str(u), string)
                equal(int(u), integer)
                equal(u.bytes, bytes)
                equal(u.bytes_le, bytes_le)
                equal(u.fields, fields)
                equal(u.time_low, fields[0])
                equal(u.time_mid, fields[1])
                equal(u.time_hi_version, fields[2])
                equal(u.clock_seq_hi_variant, fields[3])
                equal(u.clock_seq_low, fields[4])
                equal(u.node, fields[5])
                equal(u.hex, hex)
                equal(u.int, integer)
                equal(u.urn, urn)
                equal(u.time, time)
                equal(u.clock_seq, clock_seq)
                equal(u.variant, variant)
                equal(u.version, version)
                equivalents.append(u)

            # Different construction methods should give the same UUID.
            for u in equivalents:
                for v in equivalents:
                    equal(u, v)

            # Bug 7380: "bytes" and "bytes_le" should give the same type.
            equal(type(u.bytes), builtins.bytes)
            equal(type(u.bytes_le), builtins.bytes)

            ascending.append(u)

        # Test comparison of UUIDs.
        for i in range(len(ascending)):
            for j in range(len(ascending)):
                equal(i < j, ascending[i] < ascending[j])
                equal(i <= j, ascending[i] <= ascending[j])
                equal(i == j, ascending[i] == ascending[j])
                equal(i > j, ascending[i] > ascending[j])
                equal(i >= j, ascending[i] >= ascending[j])
                equal(i != j, ascending[i] != ascending[j])

        # Test sorting of UUIDs (above list is in ascending order).
        resorted = ascending[:]
        resorted.reverse()
        resorted.sort()
        equal(ascending, resorted)

    def test_exceptions(self):
        badvalue = lambda f: self.assertRaises(ValueError, f)
        badtype = lambda f: self.assertRaises(TypeError, f)

        # Badly formed hex strings.
        badvalue(lambda: self.uuid.UUID(''))
        badvalue(lambda: self.uuid.UUID('abc'))
        badvalue(lambda: self.uuid.UUID('1234567812345678123456781234567'))
        badvalue(lambda: self.uuid.UUID('123456781234567812345678123456789'))
        badvalue(lambda: self.uuid.UUID('123456781234567812345678z2345678'))

        # Badly formed bytes.
        badvalue(lambda: self.uuid.UUID(bytes='abc'))
        badvalue(lambda: self.uuid.UUID(bytes='\0'*15))
        badvalue(lambda: self.uuid.UUID(bytes='\0'*17))

        # Badly formed bytes_le.
        badvalue(lambda: self.uuid.UUID(bytes_le='abc'))
        badvalue(lambda: self.uuid.UUID(bytes_le='\0'*15))
        badvalue(lambda: self.uuid.UUID(bytes_le='\0'*17))

        # Badly formed fields.
        badvalue(lambda: self.uuid.UUID(fields=(1,)))
        badvalue(lambda: self.uuid.UUID(fields=(1, 2, 3, 4, 5)))
        badvalue(lambda: self.uuid.UUID(fields=(1, 2, 3, 4, 5, 6, 7)))

        # Field values out of range.
        badvalue(lambda: self.uuid.UUID(fields=(-1, 0, 0, 0, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0x100000000, 0, 0, 0, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, -1, 0, 0, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0x10000, 0, 0, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, -1, 0, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0x10000, 0, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0, -1, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0, 0x100, 0, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0, 0, -1, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0, 0, 0x100, 0)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0, 0, 0, -1)))
        badvalue(lambda: self.uuid.UUID(fields=(0, 0, 0, 0, 0, 0x1000000000000)))

        # Version number out of range.
        badvalue(lambda: self.uuid.UUID('00'*16, version=0))
        badvalue(lambda: self.uuid.UUID('00'*16, version=6))

        # Integer value out of range.
        badvalue(lambda: self.uuid.UUID(int=-1))
        badvalue(lambda: self.uuid.UUID(int=1<<128))

        # Must supply exactly one of hex, bytes, fields, int.
        h, b, f, i = '00'*16, b'\0'*16, (0, 0, 0, 0, 0, 0), 0
        self.uuid.UUID(h)
        self.uuid.UUID(hex=h)
        self.uuid.UUID(bytes=b)
        self.uuid.UUID(bytes_le=b)
        self.uuid.UUID(fields=f)
        self.uuid.UUID(int=i)

        # Wrong number of arguments (positional).
        badtype(lambda: self.uuid.UUID())
        badtype(lambda: self.uuid.UUID(h, b))
        badtype(lambda: self.uuid.UUID(h, b, b))
        badtype(lambda: self.uuid.UUID(h, b, b, f))
        badtype(lambda: self.uuid.UUID(h, b, b, f, i))

        # Duplicate arguments.
        for hh in [[], [('hex', h)]]:
            for bb in [[], [('bytes', b)]]:
                for bble in [[], [('bytes_le', b)]]:
                    for ii in [[], [('int', i)]]:
                        for ff in [[], [('fields', f)]]:
                            args = dict(hh + bb + bble + ii + ff)
                            if len(args) != 0:
                                badtype(lambda: self.uuid.UUID(h, **args))
                            if len(args) != 1:
                                badtype(lambda: self.uuid.UUID(**args))

        # Immutability.
        u = self.uuid.UUID(h)
        badtype(lambda: setattr(u, 'hex', h))
        badtype(lambda: setattr(u, 'bytes', b))
        badtype(lambda: setattr(u, 'bytes_le', b))
        badtype(lambda: setattr(u, 'fields', f))
        badtype(lambda: setattr(u, 'int', i))
        badtype(lambda: setattr(u, 'time_low', 0))
        badtype(lambda: setattr(u, 'time_mid', 0))
        badtype(lambda: setattr(u, 'time_hi_version', 0))
        badtype(lambda: setattr(u, 'time_hi_version', 0))
        badtype(lambda: setattr(u, 'clock_seq_hi_variant', 0))
        badtype(lambda: setattr(u, 'clock_seq_low', 0))
        badtype(lambda: setattr(u, 'node', 0))

        # Comparison with a non-UUID object
        badtype(lambda: u < object())
        badtype(lambda: u > object())

    def test_getnode(self):
        node1 = self.uuid.getnode()
        self.assertTrue(0 < node1 < (1 << 48), '%012x' % node1)

        # Test it again to ensure consistency.
        node2 = self.uuid.getnode()
        self.assertEqual(node1, node2, '%012x != %012x' % (node1, node2))

    def test_pickle_roundtrip(self):
        def check(actual, expected):
            self.assertEqual(actual, expected)
            self.assertEqual(actual.is_safe, expected.is_safe)

        with support.swap_item(sys.modules, 'uuid', self.uuid):
            for is_safe in self.uuid.SafeUUID:
                u = self.uuid.UUID('d82579ce6642a0de7ddf490a7aec7aa5',
                                   is_safe=is_safe)
                check(copy.copy(u), u)
                check(copy.deepcopy(u), u)
                for proto in range(pickle.HIGHEST_PROTOCOL + 1):
                    with self.subTest(protocol=proto):
                        check(pickle.loads(pickle.dumps(u, proto)), u)

    def test_unpickle_previous_python_versions(self):
        def check(actual, expected):
            self.assertEqual(actual, expected)
            self.assertEqual(actual.is_safe, expected.is_safe)

        pickled_uuids = [
            # Python 2.7, protocol 0
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR(dS\'int\'\nL287307832597519156748809049798316161701L\nsb.',
            # Python 2.7, protocol 1
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR}U\x03intL287307832597519156748809049798316161701L\nsb.',
            # Python 2.7, protocol 2
            b'\x80\x02cuuid\nUUID\n)\x81}U\x03int\x8a\x11\xa5z\xecz\nI\xdf}'
            b'\xde\xa0Bf\xcey%\xd8\x00sb.',
            # Python 3.6, protocol 0
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR(dVint\nL287307832597519156748809049798316161701L\nsb.',
            # Python 3.6, protocol 1
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR}X\x03\x00\x00\x00intL287307832597519156748809049798316161701L'
            b'\nsb.',
            # Python 3.6, protocol 2
            b'\x80\x02cuuid\nUUID\n)\x81}X\x03\x00\x00\x00int\x8a\x11\xa5z\xec'
            b'z\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00sb.',
            # Python 3.6, protocol 3
            b'\x80\x03cuuid\nUUID\n)\x81}X\x03\x00\x00\x00int\x8a\x11\xa5z\xec'
            b'z\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00sb.',
            # Python 3.6, protocol 4
            b'\x80\x04\x95+\x00\x00\x00\x00\x00\x00\x00\x8c\x04uuid\x8c\x04UUI'
            b'D\x93)\x81}\x8c\x03int\x8a\x11\xa5z\xecz\nI\xdf}\xde\xa0Bf\xcey%'
            b'\xd8\x00sb.',
            # Python 3.7, protocol 0
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR(dVint\nL287307832597519156748809049798316161701L\nsVis_safe\n'
            b'cuuid\nSafeUUID\n(NtRsb.',
            # Python 3.7, protocol 1
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR}(X\x03\x00\x00\x00intL287307832597519156748809049798316161701'
            b'L\nX\x07\x00\x00\x00is_safecuuid\nSafeUUID\n(NtRub.',
            # Python 3.7, protocol 2
            b'\x80\x02cuuid\nUUID\n)\x81}(X\x03\x00\x00\x00int\x8a\x11\xa5z'
            b'\xecz\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00X\x07\x00\x00\x00is_safecuu'
            b'id\nSafeUUID\nN\x85Rub.',
            # Python 3.7, protocol 3
            b'\x80\x03cuuid\nUUID\n)\x81}(X\x03\x00\x00\x00int\x8a\x11\xa5z'
            b'\xecz\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00X\x07\x00\x00\x00is_safecuu'
            b'id\nSafeUUID\nN\x85Rub.',
            # Python 3.7, protocol 4
            b'\x80\x04\x95F\x00\x00\x00\x00\x00\x00\x00\x8c\x04uuid\x94\x8c'
            b'\x04UUID\x93)\x81}(\x8c\x03int\x8a\x11\xa5z\xecz\nI\xdf}\xde\xa0'
            b'Bf\xcey%\xd8\x00\x8c\x07is_safeh\x00\x8c\x08SafeUUID\x93N\x85Rub'
            b'.',
        ]
        pickled_uuids_safe = [
            # Python 3.7, protocol 0
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR(dVint\nL287307832597519156748809049798316161701L\nsVis_safe\n'
            b'cuuid\nSafeUUID\n(I0\ntRsb.',
            # Python 3.7, protocol 1
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR}(X\x03\x00\x00\x00intL287307832597519156748809049798316161701'
            b'L\nX\x07\x00\x00\x00is_safecuuid\nSafeUUID\n(K\x00tRub.',
            # Python 3.7, protocol 2
            b'\x80\x02cuuid\nUUID\n)\x81}(X\x03\x00\x00\x00int\x8a\x11\xa5z'
            b'\xecz\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00X\x07\x00\x00\x00is_safecuu'
            b'id\nSafeUUID\nK\x00\x85Rub.',
            # Python 3.7, protocol 3
            b'\x80\x03cuuid\nUUID\n)\x81}(X\x03\x00\x00\x00int\x8a\x11\xa5z'
            b'\xecz\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00X\x07\x00\x00\x00is_safecuu'
            b'id\nSafeUUID\nK\x00\x85Rub.',
            # Python 3.7, protocol 4
            b'\x80\x04\x95G\x00\x00\x00\x00\x00\x00\x00\x8c\x04uuid\x94\x8c'
            b'\x04UUID\x93)\x81}(\x8c\x03int\x8a\x11\xa5z\xecz\nI\xdf}\xde\xa0'
            b'Bf\xcey%\xd8\x00\x8c\x07is_safeh\x00\x8c\x08SafeUUID\x93K\x00'
            b'\x85Rub.',
        ]
        pickled_uuids_unsafe = [
            # Python 3.7, protocol 0
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR(dVint\nL287307832597519156748809049798316161701L\nsVis_safe\n'
            b'cuuid\nSafeUUID\n(I-1\ntRsb.',
            # Python 3.7, protocol 1
            b'ccopy_reg\n_reconstructor\n(cuuid\nUUID\nc__builtin__\nobject\nN'
            b'tR}(X\x03\x00\x00\x00intL287307832597519156748809049798316161701'
            b'L\nX\x07\x00\x00\x00is_safecuuid\nSafeUUID\n(J\xff\xff\xff\xfftR'
            b'ub.',
            # Python 3.7, protocol 2
            b'\x80\x02cuuid\nUUID\n)\x81}(X\x03\x00\x00\x00int\x8a\x11\xa5z'
            b'\xecz\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00X\x07\x00\x00\x00is_safecuu'
            b'id\nSafeUUID\nJ\xff\xff\xff\xff\x85Rub.',
            # Python 3.7, protocol 3
            b'\x80\x03cuuid\nUUID\n)\x81}(X\x03\x00\x00\x00int\x8a\x11\xa5z'
            b'\xecz\nI\xdf}\xde\xa0Bf\xcey%\xd8\x00X\x07\x00\x00\x00is_safecuu'
            b'id\nSafeUUID\nJ\xff\xff\xff\xff\x85Rub.',
            # Python 3.7, protocol 4
            b'\x80\x04\x95J\x00\x00\x00\x00\x00\x00\x00\x8c\x04uuid\x94\x8c'
            b'\x04UUID\x93)\x81}(\x8c\x03int\x8a\x11\xa5z\xecz\nI\xdf}\xde\xa0'
            b'Bf\xcey%\xd8\x00\x8c\x07is_safeh\x00\x8c\x08SafeUUID\x93J\xff'
            b'\xff\xff\xff\x85Rub.',
        ]

        u = self.uuid.UUID('d82579ce6642a0de7ddf490a7aec7aa5')
        u_safe = self.uuid.UUID('d82579ce6642a0de7ddf490a7aec7aa5',
                                is_safe=self.uuid.SafeUUID.safe)
        u_unsafe = self.uuid.UUID('d82579ce6642a0de7ddf490a7aec7aa5',
                                  is_safe=self.uuid.SafeUUID.unsafe)

        with support.swap_item(sys.modules, 'uuid', self.uuid):
            for pickled in pickled_uuids:
                # is_safe was added in 3.7.  When unpickling values from older
                # versions, is_safe will be missing, so it should be set to
                # SafeUUID.unknown.
                check(pickle.loads(pickled), u)
            for pickled in pickled_uuids_safe:
                check(pickle.loads(pickled), u_safe)
            for pickled in pickled_uuids_unsafe:
                check(pickle.loads(pickled), u_unsafe)

    # bpo-32502: UUID1 requires a 48-bit identifier, but hardware identifiers
    # need not necessarily be 48 bits (e.g., EUI-64).
    def test_uuid1_eui64(self):
        # Confirm that uuid.getnode ignores hardware addresses larger than 48
        # bits. Mock out each platform's *_getnode helper functions to return
        # something just larger than 48 bits to test. This will cause
        # uuid.getnode to fall back on uuid._random_getnode, which will
        # generate a valid value.
        too_large_getter = lambda: 1 << 48
        with unittest.mock.patch.multiple(
            self.uuid,
            _node=None,  # Ignore any cached node value.
            _NODE_GETTERS_WIN32=[too_large_getter],
            _NODE_GETTERS_UNIX=[too_large_getter],
        ):
            node = self.uuid.getnode()
        self.assertTrue(0 < node < (1 << 48), '%012x' % node)

        # Confirm that uuid1 can use the generated node, i.e., the that
        # uuid.getnode fell back on uuid._random_getnode() rather than using
        # the value from too_large_getter above.
        try:
            self.uuid.uuid1(node=node)
        except ValueError as e:
            self.fail('uuid1 was given an invalid node ID')

    def test_uuid1(self):
        equal = self.assertEqual

        # Make sure uuid1() generates UUIDs that are actually version 1.
        for u in [self.uuid.uuid1() for i in range(10)]:
            equal(u.variant, self.uuid.RFC_4122)
            equal(u.version, 1)
            self.assertIn(u.is_safe, {self.uuid.SafeUUID.safe,
                                      self.uuid.SafeUUID.unsafe,
                                      self.uuid.SafeUUID.unknown})

        # Make sure the generated UUIDs are actually unique.
        uuids = {}
        for u in [self.uuid.uuid1() for i in range(1000)]:
            uuids[u] = 1
        equal(len(uuids.keys()), 1000)

        # Make sure the supplied node ID appears in the UUID.
        u = self.uuid.uuid1(0)
        equal(u.node, 0)
        u = self.uuid.uuid1(0x123456789abc)
        equal(u.node, 0x123456789abc)
        u = self.uuid.uuid1(0xffffffffffff)
        equal(u.node, 0xffffffffffff)

        # Make sure the supplied clock sequence appears in the UUID.
        u = self.uuid.uuid1(0x123456789abc, 0)
        equal(u.node, 0x123456789abc)
        equal(((u.clock_seq_hi_variant & 0x3f) << 8) | u.clock_seq_low, 0)
        u = self.uuid.uuid1(0x123456789abc, 0x1234)
        equal(u.node, 0x123456789abc)
        equal(((u.clock_seq_hi_variant & 0x3f) << 8) |
                         u.clock_seq_low, 0x1234)
        u = self.uuid.uuid1(0x123456789abc, 0x3fff)
        equal(u.node, 0x123456789abc)
        equal(((u.clock_seq_hi_variant & 0x3f) << 8) |
                         u.clock_seq_low, 0x3fff)

    # bpo-29925: On Mac OS X Tiger, self.uuid.uuid1().is_safe returns
    # self.uuid.SafeUUID.unknown
    @support.requires_mac_ver(10, 5)
    @unittest.skipUnless(os.name == 'posix', 'POSIX-only test')
    def test_uuid1_safe(self):
        if not self.uuid._has_uuid_generate_time_safe:
            self.skipTest('requires uuid_generate_time_safe(3)')

        u = self.uuid.uuid1()
        # uuid_generate_time_safe() may return 0 or -1 but what it returns is
        # dependent on the underlying platform support.  At least it cannot be
        # unknown (unless I suppose the platform is buggy).
        self.assertNotEqual(u.is_safe, self.uuid.SafeUUID.unknown)

    @contextlib.contextmanager
    def mock_generate_time_safe(self, safe_value):
        """
        Mock uuid._generate_time_safe() to return a given *safe_value*.
        """
        if os.name != 'posix':
            self.skipTest('POSIX-only test')
        self.uuid._load_system_functions()
        f = self.uuid._generate_time_safe
        if f is None:
            self.skipTest('need uuid._generate_time_safe')
        with unittest.mock.patch.object(self.uuid, '_generate_time_safe',
                                        lambda: (f()[0], safe_value)):
            yield

    @unittest.skipUnless(os.name == 'posix', 'POSIX-only test')
    def test_uuid1_unknown(self):
        # Even if the platform has uuid_generate_time_safe(), let's mock it to
        # be uuid_generate_time() and ensure the safety is unknown.
        with self.mock_generate_time_safe(None):
            u = self.uuid.uuid1()
            self.assertEqual(u.is_safe, self.uuid.SafeUUID.unknown)

    @unittest.skipUnless(os.name == 'posix', 'POSIX-only test')
    def test_uuid1_is_safe(self):
        with self.mock_generate_time_safe(0):
            u = self.uuid.uuid1()
            self.assertEqual(u.is_safe, self.uuid.SafeUUID.safe)

    @unittest.skipUnless(os.name == 'posix', 'POSIX-only test')
    def test_uuid1_is_unsafe(self):
        with self.mock_generate_time_safe(-1):
            u = self.uuid.uuid1()
            self.assertEqual(u.is_safe, self.uuid.SafeUUID.unsafe)

    @unittest.skipUnless(os.name == 'posix', 'POSIX-only test')
    def test_uuid1_bogus_return_value(self):
        with self.mock_generate_time_safe(3):
            u = self.uuid.uuid1()
            self.assertEqual(u.is_safe, self.uuid.SafeUUID.unknown)

    def test_uuid1_time(self):
        with mock.patch.object(self.uuid, '_has_uuid_generate_time_safe', False), \
             mock.patch.object(self.uuid, '_generate_time_safe', None), \
             mock.patch.object(self.uuid, '_last_timestamp', None), \
             mock.patch.object(self.uuid, 'getnode', return_value=93328246233727), \
             mock.patch('time.time_ns', return_value=1545052026752910643), \
             mock.patch('random.getrandbits', return_value=5317): # guaranteed to be random
            u = self.uuid.uuid1()
            self.assertEqual(u, self.uuid.UUID('a7a55b92-01fc-11e9-94c5-54e1acf6da7f'))

        with mock.patch.object(self.uuid, '_has_uuid_generate_time_safe', False), \
             mock.patch.object(self.uuid, '_generate_time_safe', None), \
             mock.patch.object(self.uuid, '_last_timestamp', None), \
             mock.patch('time.time_ns', return_value=1545052026752910643):
            u = self.uuid.uuid1(node=93328246233727, clock_seq=5317)
            self.assertEqual(u, self.uuid.UUID('a7a55b92-01fc-11e9-94c5-54e1acf6da7f'))

    def test_uuid3(self):
        equal = self.assertEqual

        # Test some known version-3 UUIDs.
        for u, v in [(self.uuid.uuid3(self.uuid.NAMESPACE_DNS, 'python.org'),
                      '6fa459ea-ee8a-3ca4-894e-db77e160355e'),
                     (self.uuid.uuid3(self.uuid.NAMESPACE_URL, 'http://python.org/'),
                      '9fe8e8c4-aaa8-32a9-a55c-4535a88b748d'),
                     (self.uuid.uuid3(self.uuid.NAMESPACE_OID, '1.3.6.1'),
                      'dd1a1cef-13d5-368a-ad82-eca71acd4cd1'),
                     (self.uuid.uuid3(self.uuid.NAMESPACE_X500, 'c=ca'),
                      '658d3002-db6b-3040-a1d1-8ddd7d189a4d'),
                    ]:
            equal(u.variant, self.uuid.RFC_4122)
            equal(u.version, 3)
            equal(u, self.uuid.UUID(v))
            equal(str(u), v)

    def test_uuid4(self):
        equal = self.assertEqual

        # Make sure uuid4() generates UUIDs that are actually version 4.
        for u in [self.uuid.uuid4() for i in range(10)]:
            equal(u.variant, self.uuid.RFC_4122)
            equal(u.version, 4)

        # Make sure the generated UUIDs are actually unique.
        uuids = {}
        for u in [self.uuid.uuid4() for i in range(1000)]:
            uuids[u] = 1
        equal(len(uuids.keys()), 1000)

    def test_uuid5(self):
        equal = self.assertEqual

        # Test some known version-5 UUIDs.
        for u, v in [(self.uuid.uuid5(self.uuid.NAMESPACE_DNS, 'python.org'),
                      '886313e1-3b8a-5372-9b90-0c9aee199e5d'),
                     (self.uuid.uuid5(self.uuid.NAMESPACE_URL, 'http://python.org/'),
                      '4c565f0d-3f5a-5890-b41b-20cf47701c5e'),
                     (self.uuid.uuid5(self.uuid.NAMESPACE_OID, '1.3.6.1'),
                      '1447fa61-5277-5fef-a9b3-fbc6e44f4af3'),
                     (self.uuid.uuid5(self.uuid.NAMESPACE_X500, 'c=ca'),
                      'cc957dd1-a972-5349-98cd-874190002798'),
                    ]:
            equal(u.variant, self.uuid.RFC_4122)
            equal(u.version, 5)
            equal(u, self.uuid.UUID(v))
            equal(str(u), v)

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def testIssue8621(self):
        # On at least some versions of OSX self.uuid.uuid4 generates
        # the same sequence of UUIDs in the parent and any
        # children started using fork.
        fds = os.pipe()
        pid = os.fork()
        if pid == 0:
            os.close(fds[0])
            value = self.uuid.uuid4()
            os.write(fds[1], value.hex.encode('latin-1'))
            os._exit(0)

        else:
            os.close(fds[1])
            self.addCleanup(os.close, fds[0])
            parent_value = self.uuid.uuid4().hex
            os.waitpid(pid, 0)
            child_value = os.read(fds[0], 100).decode('latin-1')

            self.assertNotEqual(parent_value, child_value)

    def test_uuid_weakref(self):
        # bpo-35701: check that weak referencing to a UUID object can be created
        strong = self.uuid.uuid4()
        weak = weakref.ref(strong)
        self.assertIs(strong, weak())

class TestUUIDWithoutExtModule(BaseTestUUID, unittest.TestCase):
    uuid = py_uuid

@unittest.skipUnless(c_uuid, 'requires the C _uuid module')
class TestUUIDWithExtModule(BaseTestUUID, unittest.TestCase):
    uuid = c_uuid


class BaseTestInternals:
    uuid = None

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_find_mac(self):
        data = '''
fake hwaddr
cscotun0  Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
eth0      Link encap:Ethernet  HWaddr 12:34:56:78:90:ab
'''

        popen = unittest.mock.MagicMock()
        popen.stdout = io.BytesIO(data.encode())

        with unittest.mock.patch.object(shutil, 'which',
                                        return_value='/sbin/ifconfig'):
            with unittest.mock.patch.object(subprocess, 'Popen',
                                            return_value=popen):
                mac = self.uuid._find_mac(
                    command='ifconfig',
                    args='',
                    hw_identifiers=[b'hwaddr'],
                    get_index=lambda x: x + 1,
                )

        self.assertEqual(mac, 0x1234567890ab)

    def check_node(self, node, requires=None):
        if requires and node is None:
            self.skipTest('requires ' + requires)
        hex = '%012x' % node
        if support.verbose >= 2:
            print(hex, end=' ')
        self.assertTrue(0 < node < (1 << 48),
                        "%s is not an RFC 4122 node ID" % hex)

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_ifconfig_getnode(self):
        node = self.uuid._ifconfig_getnode()
        self.check_node(node, 'ifconfig')

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_ip_getnode(self):
        node = self.uuid._ip_getnode()
        self.check_node(node, 'ip')

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_arp_getnode(self):
        node = self.uuid._arp_getnode()
        self.check_node(node, 'arp')

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_lanscan_getnode(self):
        node = self.uuid._lanscan_getnode()
        self.check_node(node, 'lanscan')

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_netstat_getnode(self):
        node = self.uuid._netstat_getnode()
        self.check_node(node, 'netstat')

    @unittest.skipUnless(os.name == 'nt', 'requires Windows')
    def test_ipconfig_getnode(self):
        node = self.uuid._ipconfig_getnode()
        self.check_node(node, 'ipconfig')

    @unittest.skipUnless(importable('win32wnet'), 'requires win32wnet')
    @unittest.skipUnless(importable('netbios'), 'requires netbios')
    def test_netbios_getnode(self):
        node = self.uuid._netbios_getnode()
        self.check_node(node)

    def test_random_getnode(self):
        node = self.uuid._random_getnode()
        # The multicast bit, i.e. the least significant bit of first octet,
        # must be set for randomly generated MAC addresses.  See RFC 4122,
        # $4.1.6.
        self.assertTrue(node & (1 << 40), '%012x' % node)
        self.check_node(node)

        node2 = self.uuid._random_getnode()
        self.assertNotEqual(node2, node, '%012x' % node)

    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
    def test_unix_getnode(self):
        if not importable('_uuid') and not importable('ctypes'):
            self.skipTest("neither _uuid extension nor ctypes available")
        try: # Issues 1481, 3581: _uuid_generate_time() might be None.
            node = self.uuid._unix_getnode()
        except TypeError:
            self.skipTest('requires uuid_generate_time')
        self.check_node(node, 'unix')

    @unittest.skipUnless(os.name == 'nt', 'requires Windows')
    @unittest.skipUnless(importable('ctypes'), 'requires ctypes')
    def test_windll_getnode(self):
        node = self.uuid._windll_getnode()
        self.check_node(node)


class TestInternalsWithoutExtModule(BaseTestInternals, unittest.TestCase):
    uuid = py_uuid

@unittest.skipUnless(c_uuid, 'requires the C _uuid module')
class TestInternalsWithExtModule(BaseTestInternals, unittest.TestCase):
    uuid = c_uuid


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