tools/findbits_test.py

   1 #!/usr/bin/python
   2
   3 from itertools import imap
   4 import unittest, sys, findbits
   5
   6 class TestFindBits(unittest.TestCase):
   7         def setUp(self):
   8                 self.old_stdout = sys.stdout
   9                 sys.stdout = OutputBuffer()
  10
  11         def tearDown(self):
  12                 sys.stdout = self.old_stdout
  13
  14         INVERT_CASES = [
  15                         ('10', '01'),
  16                         ('', ''),
  17                         ]
  18         def test_invert(self):
  19                 self.commutative_test(findbits.invert, self.INVERT_CASES)
  20
  21         SEARCH_CASES = [
  22                         ('1111', '10111101', ['Match at bit 2', '0<1111>0']),
  23                         ('00', '10111101', ['Not found']),
  24                         ]
  25         def test_search(self):
  26                 for target, data, expected_fragments in self.SEARCH_CASES:
  27                         sys.stdout.clear_buffer()
  28                         findbits.search(target, data)
  29                         for fragment in expected_fragments:
  30                                 self.assertIn(fragment, sys.stdout.content)
  31
  32         BINSTRING_CASES = [
  33                         (42, '101010'),
  34                         (1, '1'),
  35                         (0, ''),
  36                         ]
  37         def test_binstring(self):
  38                 self.unary_operation_test(findbits.binstring, self.BINSTRING_CASES)
  39
  40         REVERSE_CASES = [
  41                         ('abc', 'cba'),
  42                         ('', ''),
  43                         ]
  44         def test_stringreverse(self):
  45                 self.commutative_test(findbits.stringreverse, self.REVERSE_CASES)
  46
  47         def commutative_test(self, operation, cases):
  48                 self.unary_operation_test(operation, cases)
  49                 self.unary_operation_test(operation, imap(reversed, cases))
  50
  51         def unary_operation_test(self, operation, cases):
  52                 for case_in, case_out in cases:
  53                         self.assertEqual(operation(case_in), case_out)
  54
  55
  56 class OutputBuffer(object):
  57         def __init__(self):
  58                 self.clear_buffer()
  59
  60         def clear_buffer(self):
  61                 self.content = ''
  62
  63         def write(self, data):
  64                 self.content += data
  65
  66
  67 if __name__ == '__main__':
  68         unittest.main()