text: #!/usr/bin/env python3
  #
  # Copyright (c) 2018, Nicola Coretti
  # All rights reserved.
  import string
  import unittest
  
  from unittest.mock import patch
  
  from crc import tools
  from crc.crc import Byte, CrcRegister, create_lookup_table, CrcCalculator
  from crc.crc import Configuration, Crc8, Crc16
  from collections import namedtuple
  
  CrcTestData = namedtuple('CrcTestData', 'data checksum')
  
  
  class ByteTest(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def test_conversion_to_int(self):
          int_value = 0x01
          byte = Byte(int_value)
          self.assertIsInstance(int(byte), int)
          self.assertEqual(int(byte), int_value)
  
      def test_is_equal_operator(self):
          for value in range(0, 256):
              self.assertEqual(Byte(value) == Byte(value), True)
              self.assertEqual(Byte(value) == Byte(value + 1), False)
  
      def test_adding_two_bytes_without_overflow(self):
          lhs = Byte(0x02)
          rhs = Byte(0x10)
          expected_result = Byte(0x12)
          self.assertEqual(lhs + rhs, expected_result)
  
      def test_adding_an_integer_to_a_byte_without_overflow(self):
          lhs = 0xF0
          rhs = Byte(0x02)
          expected_result = Byte(lhs + int(rhs))
          self.assertEqual(lhs + rhs, expected_result)
  
      def test_adding_two_bytes_with_overflow(self):
          lhs = Byte(0xFA)
          rhs = Byte(0xFA)
          expected_result = Byte(0xFA + 0xFA)
          self.assertEqual(expected_result, lhs + rhs)
  
      def test_adding_an_integer_to_a_byte_with_overflow(self):
          lhs = 0xFA
          rhs = Byte(0xFA)
          expected_result = Byte(lhs + int(rhs))
          self.assertEqual(lhs + rhs, expected_result)
          self.assertEqual(lhs + rhs, expected_result)
  
      def test_instance_based_add(self):
          lhs = Byte(0x00)
          rhs = Byte(0xFA)
          lhs += rhs
          self.assertEqual(lhs._value, rhs._value)
  
      def test_reversed(self):
          self.assertEqual(int(Byte(0x80).reversed()), 0x01)
          self.assertEqual(int(Byte(0x10).reversed()), 0x08)
          self.assertEqual(int(Byte(0x01).reversed()), 0x80)
          self.assertEqual(int(Byte(0x11).reversed()), 0x88)
          self.assertEqual(int(Byte(0xF0).reversed()), 0x0F)
          self.assertEqual(int(Byte(0x0F).reversed()), 0xF0)
  
  
  class CrcConfigurationTest(unittest.TestCase):
  
      def setUp(self):
          self.width = 8
          self.polynom = 0x07
          self.init_value = 0xFF
          self.final_xor_value = 0xAA
          self.reverse_input = True
          self.reverse_output = True
  
      def test_init_using_defaults(self):
          configuration = Configuration(self.width, self.polynom)
          self.assertEqual(configuration.width, self.width)
          self.assertEqual(configuration.polynomial, self.polynom)
          self.assertEqual(configuration.init_value, 0)
          self.assertEqual(configuration.final_xor_value, 0)
          self.assertEqual(configuration.reverse_input, False)
          self.assertEqual(configuration.reverse_output, False)
  
      def test_init(self):
          configuration = Configuration(self.width,
                                        self.polynom,
                                        self.init_value,
                                        self.final_xor_value,
                                        self.reverse_input,
                                        self.reverse_output)
  
          self.assertEqual(configuration.width, self.width)
          self.assertEqual(configuration.polynomial, self.polynom)
          self.assertEqual(configuration.init_value, self.init_value)
          self.assertEqual(configuration.final_xor_value, self.final_xor_value)
          self.assertEqual(configuration.reverse_input, self.reverse_input)
          self.assertEqual(configuration.reverse_output, self.reverse_output)
  
  
  class CrcRegisterTest(unittest.TestCase):
  
      def test_init_works_with_enum(self):
          config = Crc8.CCITT
          crc_register = CrcRegister(config)
  
      def test_crc8_ccitt(self):
          config = Crc8.CCITT
          crc_register = CrcRegister(config)
          test_suit = [
              CrcTestData(data='', checksum=0x00),
              CrcTestData(data=string.digits[1:], checksum=0xF4),
              CrcTestData(data=string.digits[1:][::-1], checksum=0x91),
              CrcTestData(data=string.digits, checksum=0x45),
              CrcTestData(data=string.digits[::-1], checksum=0x6E),
          ]
          for test in test_suit:
              crc_register.init()
              crc_register.update(test.data.encode('utf-8'))
              self.assertEqual(test.checksum, crc_register.digest())
  
      def test_crc8_saej1850(self):
          config = Crc8.SAEJ1850
          crc_register = CrcRegister(config)
          test_suit = [
              CrcTestData(data='', checksum=0x00),
              CrcTestData(data=string.digits[1:], checksum=0x37),
              CrcTestData(data=string.digits[1:][::-1], checksum=0xAA),
              CrcTestData(data=string.digits, checksum=0x8A),
              CrcTestData(data=string.digits[::-1], checksum=0x39),
          ]
          for test in test_suit:
              crc_register.init()
              crc_register.update(test.data.encode('utf-8'))
              self.assertEqual(test.checksum, crc_register.digest())
  
      def test_crc16_ccitt(self):
          config = Crc16.CCITT
          crc_register = CrcRegister(config)
          test_suit = [
              CrcTestData(data='', checksum=0x0000),
              CrcTestData(data=string.digits[1:], checksum=0x31C3),
              CrcTestData(data=string.digits[1:][::-1], checksum=0x9CAD),
              CrcTestData(data=string.digits, checksum=0x9C58),
              CrcTestData(data=string.digits[::-1], checksum=0xD966),
          ]
          for test in test_suit:
              crc_register.init()
              crc_register.update(test.data.encode('utf-8'))
              self.assertEqual(test.checksum, crc_register.digest())
  
      def test_crc16_with_reflected_input(self):
          config = Configuration(16, 0x1021, 0, 0, True, False)
          crc_register = CrcRegister(config)
          test_suit = [
              CrcTestData(data='', checksum=0x0000),
              CrcTestData(data=string.digits[1:], checksum=0x9184),
              CrcTestData(data=string.digits[1:][::-1], checksum=0xF92C),
              CrcTestData(data=string.digits, checksum=0x76FA),
              CrcTestData(data=string.digits[::-1], checksum=0x93BA),
          ]
          for test in test_suit:
              crc_register.init()
              crc_register.update(test.data.encode('utf-8'))
              self.assertEqual(test.checksum, crc_register.digest())
  
      def test_crc16_with_reflected_output(self):
          config = Configuration(16, 0x1021, 0, 0, False, True)
          crc_register = CrcRegister(config)
          test_suit = [
              CrcTestData(data='', checksum=0x0000),
              CrcTestData(data=string.digits[1:], checksum=0xC38C),
              CrcTestData(data=string.digits[1:][::-1], checksum=0xB539),
              CrcTestData(data=string.digits, checksum=0x1A39),
              CrcTestData(data=string.digits[::-1], checksum=0x669B),
          ]
          for test in test_suit:
              crc_register.init()
              crc_register.update(test.data.encode('utf-8'))
              self.assertEqual(test.checksum, crc_register.digest())
  
  
  class TableBasedCrcRegisterTest(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def test_crc8_autosar(self):
          pass
  
      def test_crc8_ccitt(self):
          pass
  
      def test_crc8_saej1850(self):
          pass
  
      def test_crc16_ccitt(self):
          pass
  
      def test_crc32(self):
          pass
  
  
  class CrcCalculatorTest(unittest.TestCase):
  
      def test_register_based(self):
          calculator = CrcCalculator(Crc8.CCITT)
          test_suit = [
              CrcTestData(data='', checksum=0x00),
              CrcTestData(data=string.digits[1:], checksum=0xF4),
              CrcTestData(data=string.digits[1:][::-1], checksum=0x91),
              CrcTestData(data=string.digits, checksum=0x45),
              CrcTestData(data=string.digits[::-1], checksum=0x6E),
          ]
          for test in test_suit:
              calculator.verify_checksum(test.data.encode('utf-8'), test.checksum)
  
      def test_table_based_calculator(self):
          calculator = CrcCalculator(Crc8.CCITT, True)
          test_suit = [
              CrcTestData(data='', checksum=0x00),
              CrcTestData(data=string.digits[1:], checksum=0xF4),
              CrcTestData(data=string.digits[1:][::-1], checksum=0x91),
              CrcTestData(data=string.digits, checksum=0x45),
              CrcTestData(data=string.digits[::-1], checksum=0x6E),
          ]
          for test in test_suit:
              calculator.verify_checksum(test.data.encode('utf-8'), test.checksum)
  
  
  class CreateLookupTableTest(unittest.TestCase):
  
      def test_create_crc8_lookup_table(self):
          tables = {
              0x07: [
                  0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
                  0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
                  0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
                  0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
                  0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
                  0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
                  0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
                  0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
                  0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
                  0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
                  0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
                  0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
                  0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
                  0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
                  0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
                  0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
              ],
  
              0x1D:
                  [0x00, 0x1D, 0x3A, 0x27, 0x74, 0x69, 0x4E, 0x53, 0xE8, 0xF5, 0xD2, 0xCF,
                   0x9C, 0x81, 0xA6, 0xBB, 0xCD, 0xD0, 0xF7, 0xEA, 0xB9, 0xA4, 0x83, 0x9E,
                   0x25, 0x38, 0x1F, 0x02, 0x51, 0x4C, 0x6B, 0x76, 0x87, 0x9A, 0xBD, 0xA0,
                   0xF3, 0xEE, 0xC9, 0xD4, 0x6F, 0x72, 0x55, 0x48, 0x1B, 0x06, 0x21, 0x3C,
                   0x4A, 0x57, 0x70, 0x6D, 0x3E, 0x23, 0x04, 0x19, 0xA2, 0xBF, 0x98, 0x85,
                   0xD6, 0xCB, 0xEC, 0xF1, 0x13, 0x0E, 0x29, 0x34, 0x67, 0x7A, 0x5D, 0x40,
                   0xFB, 0xE6, 0xC1, 0xDC, 0x8F, 0x92, 0xB5, 0xA8, 0xDE, 0xC3, 0xE4, 0xF9,
                   0xAA, 0xB7, 0x90, 0x8D, 0x36, 0x2B, 0x0C, 0x11, 0x42, 0x5F, 0x78, 0x65,
                   0x94, 0x89, 0xAE, 0xB3, 0xE0, 0xFD, 0xDA, 0xC7, 0x7C, 0x61, 0x46, 0x5B,
                   0x08, 0x15, 0x32, 0x2F, 0x59, 0x44, 0x63, 0x7E, 0x2D, 0x30, 0x17, 0x0A,
                   0xB1, 0xAC, 0x8B, 0x96, 0xC5, 0xD8, 0xFF, 0xE2, 0x26, 0x3B, 0x1C, 0x01,
                   0x52, 0x4F, 0x68, 0x75, 0xCE, 0xD3, 0xF4, 0xE9, 0xBA, 0xA7, 0x80, 0x9D,
                   0xEB, 0xF6, 0xD1, 0xCC, 0x9F, 0x82, 0xA5, 0xB8, 0x03, 0x1E, 0x39, 0x24,
                   0x77, 0x6A, 0x4D, 0x50, 0xA1, 0xBC, 0x9B, 0x86, 0xD5, 0xC8, 0xEF, 0xF2,
                   0x49, 0x54, 0x73, 0x6E, 0x3D, 0x20, 0x07, 0x1A, 0x6C, 0x71, 0x56, 0x4B,
                   0x18, 0x05, 0x22, 0x3F, 0x84, 0x99, 0xBE, 0xA3, 0xF0, 0xED, 0xCA, 0xD7,
                   0x35, 0x28, 0x0F, 0x12, 0x41, 0x5C, 0x7B, 0x66, 0xDD, 0xC0, 0xE7, 0xFA,
                   0xA9, 0xB4, 0x93, 0x8E, 0xF8, 0xE5, 0xC2, 0xDF, 0x8C, 0x91, 0xB6, 0xAB,
                   0x10, 0x0D, 0x2A, 0x37, 0x64, 0x79, 0x5E, 0x43, 0xB2, 0xAF, 0x88, 0x95,
                   0xC6, 0xDB, 0xFC, 0xE1, 0x5A, 0x47, 0x60, 0x7D, 0x2E, 0x33, 0x14, 0x09,
                   0x7F, 0x62, 0x45, 0x58, 0x0B, 0x16, 0x31, 0x2C, 0x97, 0x8A, 0xAD, 0xB0,
                   0xE3, 0xFE, 0xD9, 0xC4]
          }
          for polynom, table in tables.items():
              with self.subTest(polynom=polynom, table=table):
                  self.assertEqual(table, create_lookup_table(8, polynom))
  
      def test_create_crc16_lookup_table(self):
          tables = {
              0x1021:
                  [0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
                   0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
                   0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
                   0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
                   0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
                   0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
                   0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
                   0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
                   0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
                   0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
                   0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
                   0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
                   0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
                   0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
                   0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
                   0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
                   0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
                   0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
                   0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
                   0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
                   0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
                   0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
                   0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
                   0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
                   0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
                   0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
                   0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
                   0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
                   0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
                   0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
                   0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
                   0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0]
          }
          for polynom, table in tables.items():
              with self.subTest(polynom=polynom, table=table):
                  self.assertEqual(table, create_lookup_table(16, polynom))
  
      def test_create_crc32_lookup_table(self):
          tables = {
              0x4C11DB7:
                  [0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
                   0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,
                   0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75,
                   0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, 0x709F7B7A, 0x745E66CD,
                   0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039, 0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5,
                   0xBE2B5B58, 0xBAEA46EF, 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D,
                   0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,
                   0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D,
                   0x34867077, 0x30476DC0, 0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072,
                   0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA,
                   0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE, 0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02,
                   0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
                   0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC, 0xB6238B25, 0xB2E29692,
                   0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6, 0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A,
                   0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2,
                   0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34, 0xDC3ABDED, 0xD8FBA05A,
                   0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637, 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,
                   0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53,
                   0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, 0x3F9B762C, 0x3B5A6B9B,
                   0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF, 0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623,
                   0xF12F560E, 0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B,
                   0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,
                   0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B,
                   0x9B3660C6, 0x9FF77D71, 0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3,
                   0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C,
                   0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8, 0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24,
                   0x119B4BE9, 0x155A565E, 0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
                   0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A, 0x2D15EBE3, 0x29D4F654,
                   0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0, 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C,
                   0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4,
                   0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662, 0x933EB0BB, 0x97FFAD0C,
                   0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668, 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4]
          }
          for polynom, table in tables.items():
              with self.subTest(polynom=polynom, table=table):
                  self.assertEqual(table, create_lookup_table(32, polynom))
  
  
  class CrcCommandTest(unittest.TestCase):
  
      @patch('sys.argv', ('crc', '--help'))
      @patch('builtins.print')
      def test_prints_help(self, print_mock):
          with self.assertRaises(SystemExit):
              tools.main()
          print_mock.assert_called_with(tools.main.__doc__.strip('\n'))
  
      @patch('sys.argv', ('crc', 'table'))
      def test_prints_table_usage(self):
          # Docopt will print usage and call system exit if params are not sufficient or invalid
          # FIXME: also add a check if the correct usage is printed
          self.assertRaises(SystemExit, tools.main)
  
  
  if __name__ == '__main__':
      unittest.main()
  