| """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2""" |
| |
| import unittest |
| |
| class UnaryOpTestCase(unittest.TestCase): |
| |
| def test_negative(self): |
| self.assertTrue(-2 == 0 - 2) |
| self.assertEqual(-0, 0) |
| self.assertEqual(--2, 2) |
| self.assertTrue(-2 == 0 - 2) |
| self.assertTrue(-2.0 == 0 - 2.0) |
| self.assertTrue(-2j == 0 - 2j) |
| |
| def test_positive(self): |
| self.assertEqual(+2, 2) |
| self.assertEqual(+0, 0) |
| self.assertEqual(++2, 2) |
| self.assertEqual(+2, 2) |
| self.assertEqual(+2.0, 2.0) |
| self.assertEqual(+2j, 2j) |
| |
| def test_invert(self): |
| self.assertTrue(-2 == 0 - 2) |
| self.assertEqual(-0, 0) |
| self.assertEqual(--2, 2) |
| self.assertTrue(-2 == 0 - 2) |
| |
| def test_no_overflow(self): |
| nines = "9" * 32 |
| self.assertTrue(eval("+" + nines) == 10**32-1) |
| self.assertTrue(eval("-" + nines) == -(10**32-1)) |
| self.assertTrue(eval("~" + nines) == ~(10**32-1)) |
| |
| def test_negation_of_exponentiation(self): |
| # Make sure '**' does the right thing; these form a |
| # regression test for SourceForge bug #456756. |
| self.assertEqual(-2 ** 3, -8) |
| self.assertEqual((-2) ** 3, -8) |
| self.assertEqual(-2 ** 4, -16) |
| self.assertEqual((-2) ** 4, 16) |
| |
| def test_bad_types(self): |
| for op in '+', '-', '~': |
| self.assertRaises(TypeError, eval, op + "b'a'") |
| self.assertRaises(TypeError, eval, op + "'a'") |
| |
| self.assertRaises(TypeError, eval, "~2j") |
| self.assertRaises(TypeError, eval, "~2.0") |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |