| """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2""" |
| |
| import unittest |
| from test.test_support import run_unittest, have_unicode |
| |
| class UnaryOpTestCase(unittest.TestCase): |
| |
| def test_negative(self): |
| self.assertTrue(-2 == 0 - 2) |
| self.assertTrue(-0 == 0) |
| self.assertTrue(--2 == 2) |
| self.assertTrue(-2L == 0 - 2L) |
| self.assertTrue(-2.0 == 0 - 2.0) |
| self.assertTrue(-2j == 0 - 2j) |
| |
| def test_positive(self): |
| self.assertTrue(+2 == 2) |
| self.assertTrue(+0 == 0) |
| self.assertTrue(++2 == 2) |
| self.assertTrue(+2L == 2L) |
| self.assertTrue(+2.0 == 2.0) |
| self.assertTrue(+2j == 2j) |
| |
| def test_invert(self): |
| self.assertTrue(-2 == 0 - 2) |
| self.assertTrue(-0 == 0) |
| self.assertTrue(--2 == 2) |
| self.assertTrue(-2L == 0 - 2L) |
| |
| def test_no_overflow(self): |
| nines = "9" * 32 |
| self.assertTrue(eval("+" + nines) == eval("+" + nines + "L")) |
| self.assertTrue(eval("-" + nines) == eval("-" + nines + "L")) |
| self.assertTrue(eval("~" + nines) == eval("~" + nines + "L")) |
| |
| 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 + "'a'") |
| if have_unicode: |
| self.assertRaises(TypeError, eval, op + "u'a'") |
| |
| self.assertRaises(TypeError, eval, "~2j") |
| self.assertRaises(TypeError, eval, "~2.0") |
| |
| |
| def test_main(): |
| run_unittest(UnaryOpTestCase) |
| |
| |
| if __name__ == "__main__": |
| test_main() |