| """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 == 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(+2.0, 2.0) | |
| self.assertEqual(+2j, 2j) | |
| def test_invert(self): | |
| self.assertTrue(~2 == -(2+1)) | |
| self.assertEqual(~0, -1) | |
| self.assertEqual(~~2, 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() |