Lib/test/test_undocumented_details.py

   1 from test.test_support import run_unittest, check_py3k_warnings
   2 import unittest
   3
   4 class TestImplementationComparisons(unittest.TestCase):
   5
   6     def test_type_comparisons(self):
   7         self.assertTrue(str < int or str > int)
   8         self.assertTrue(int <= str or int >= str)
   9         self.assertTrue(cmp(int, str) != 0)
  10         self.assertTrue(int is int)
  11         self.assertTrue(str == str)
  12         self.assertTrue(int != str)
  13
  14     def test_cell_comparisons(self):
  15         def f(x):
  16             if x:
  17                 y = 1
  18             def g():
  19                 return x
  20             def h():
  21                 return y
  22             return g, h
  23         g, h = f(0)
  24         g_cell, = g.func_closure
  25         h_cell, = h.func_closure
  26         self.assertTrue(h_cell < g_cell)
  27         self.assertTrue(g_cell >= h_cell)
  28         self.assertEqual(cmp(g_cell, h_cell), 1)
  29         self.assertTrue(g_cell is g_cell)
  30         self.assertTrue(g_cell == g_cell)
  31         self.assertTrue(h_cell == h_cell)
  32         self.assertTrue(g_cell != h_cell)
  33
  34 def test_main():
  35     with check_py3k_warnings():
  36         run_unittest(TestImplementationComparisons)
  37
  38 if __name__ == '__main__':
  39     test_main()