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Text File  |  2005-11-19  |  2KB  |  60 lines
  1. """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2"""
  2.  
  3. import unittest
  4. from test.test_support import run_unittest, have_unicode
  5.  
  6. class UnaryOpTestCase(unittest.TestCase):
  7.  
  8.     def test_negative(self):
  9.         self.assert_(-2 == 0 - 2)
  10.         self.assert_(-0 == 0)
  11.         self.assert_(--2 == 2)
  12.         self.assert_(-2L == 0 - 2L)
  13.         self.assert_(-2.0 == 0 - 2.0)
  14.         self.assert_(-2j == 0 - 2j)
  15.  
  16.     def test_positive(self):
  17.         self.assert_(+2 == 2)
  18.         self.assert_(+0 == 0)
  19.         self.assert_(++2 == 2)
  20.         self.assert_(+2L == 2L)
  21.         self.assert_(+2.0 == 2.0)
  22.         self.assert_(+2j == 2j)
  23.  
  24.     def test_invert(self):
  25.         self.assert_(-2 == 0 - 2)
  26.         self.assert_(-0 == 0)
  27.         self.assert_(--2 == 2)
  28.         self.assert_(-2L == 0 - 2L)
  29.  
  30.     def test_no_overflow(self):
  31.         nines = "9" * 32
  32.         self.assert_(eval("+" + nines) == eval("+" + nines + "L"))
  33.         self.assert_(eval("-" + nines) == eval("-" + nines + "L"))
  34.         self.assert_(eval("~" + nines) == eval("~" + nines + "L"))
  35.  
  36.     def test_negation_of_exponentiation(self):
  37.         # Make sure '**' does the right thing; these form a
  38.         # regression test for SourceForge bug #456756.
  39.         self.assertEqual(-2 ** 3, -8)
  40.         self.assertEqual((-2) ** 3, -8)
  41.         self.assertEqual(-2 ** 4, -16)
  42.         self.assertEqual((-2) ** 4, 16)
  43.  
  44.     def test_bad_types(self):
  45.         for op in '+', '-', '~':
  46.             self.assertRaises(TypeError, eval, op + "'a'")
  47.             if have_unicode:
  48.                 self.assertRaises(TypeError, eval, op + "u'a'")
  49.  
  50.         self.assertRaises(TypeError, eval, "~2j")
  51.         self.assertRaises(TypeError, eval, "~2.0")
  52.  
  53.  
  54. def test_main():
  55.     run_unittest(UnaryOpTestCase)
  56.  
  57.  
  58. if __name__ == "__main__":
  59.     test_main()
  60.