"""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() |