mirror of
https://github.com/python/cpython
synced 2024-09-18 22:11:39 +00:00
51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
"""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()
|