1 """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2""" 2 3 import unittest 4 5 class UnaryOpTestCase(unittest.TestCase): 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() 54
