1  """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2"""
       2  
       3  import unittest
       4  
       5  class ESC[4;38;5;81mUnaryOpTestCase(ESC[4;38;5;149munittestESC[4;38;5;149m.ESC[4;38;5;149mTestCase):
       6  
       7      def test_negative(self):
       8          self.assertTrue(-2 == 0 - 2)
       9          self.assertEqual(-0, 0)
      10          self.assertEqual(--2, 2)
      11          self.assertTrue(-2 == 0 - 2)
      12          self.assertTrue(-2.0 == 0 - 2.0)
      13          self.assertTrue(-2j == 0 - 2j)
      14  
      15      def test_positive(self):
      16          self.assertEqual(+2, 2)
      17          self.assertEqual(+0, 0)
      18          self.assertEqual(++2, 2)
      19          self.assertEqual(+2, 2)
      20          self.assertEqual(+2.0, 2.0)
      21          self.assertEqual(+2j, 2j)
      22  
      23      def test_invert(self):
      24          self.assertTrue(-2 == 0 - 2)
      25          self.assertEqual(-0, 0)
      26          self.assertEqual(--2, 2)
      27          self.assertTrue(-2 == 0 - 2)
      28  
      29      def test_no_overflow(self):
      30          nines = "9" * 32
      31          self.assertTrue(eval("+" + nines) == 10**32-1)
      32          self.assertTrue(eval("-" + nines) == -(10**32-1))
      33          self.assertTrue(eval("~" + nines) == ~(10**32-1))
      34  
      35      def test_negation_of_exponentiation(self):
      36          # Make sure '**' does the right thing; these form a
      37          # regression test for SourceForge bug #456756.
      38          self.assertEqual(-2 ** 3, -8)
      39          self.assertEqual((-2) ** 3, -8)
      40          self.assertEqual(-2 ** 4, -16)
      41          self.assertEqual((-2) ** 4, 16)
      42  
      43      def test_bad_types(self):
      44          for op in '+', '-', '~':
      45              self.assertRaises(TypeError, eval, op + "b'a'")
      46              self.assertRaises(TypeError, eval, op + "'a'")
      47  
      48          self.assertRaises(TypeError, eval, "~2j")
      49          self.assertRaises(TypeError, eval, "~2.0")
      50  
      51  
      52  if __name__ == "__main__":
      53      unittest.main()