text: import unittest.mock
  from test import support
  import builtins
  import contextlib
  import sys
  import io
  import os
  import shutil
  import subprocess
  
  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))
  
      # 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_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')
      @unittest.skipIf('vxworks' in sys.platform, 'no os fork in VxWorks')
      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)
  
  
  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()
  