mirror of
https://github.com/python/cpython.git
synced 2025-10-31 21:51:50 +00:00
be436e08b8
* Rename _PyLong_AsInt() to PyLong_AsInt(). * Add documentation. * Add test. * For now, keep _PyLong_AsInt() as an alias to PyLong_AsInt().
69 lines
2.2 KiB
Python
69 lines
2.2 KiB
Python
import unittest
|
|
import sys
|
|
|
|
from test.support import import_helper
|
|
|
|
# Skip this test if the _testcapi module isn't available.
|
|
_testcapi = import_helper.import_module('_testcapi')
|
|
|
|
|
|
class LongTests(unittest.TestCase):
|
|
|
|
def test_compact(self):
|
|
for n in {
|
|
# Edge cases
|
|
*(2**n for n in range(66)),
|
|
*(-2**n for n in range(66)),
|
|
*(2**n - 1 for n in range(66)),
|
|
*(-2**n + 1 for n in range(66)),
|
|
# Essentially random
|
|
*(37**n for n in range(14)),
|
|
*(-37**n for n in range(14)),
|
|
}:
|
|
with self.subTest(n=n):
|
|
is_compact, value = _testcapi.call_long_compact_api(n)
|
|
if is_compact:
|
|
self.assertEqual(n, value)
|
|
|
|
def test_compact_known(self):
|
|
# Sanity-check some implementation details (we don't guarantee
|
|
# that these are/aren't compact)
|
|
self.assertEqual(_testcapi.call_long_compact_api(-1), (True, -1))
|
|
self.assertEqual(_testcapi.call_long_compact_api(0), (True, 0))
|
|
self.assertEqual(_testcapi.call_long_compact_api(256), (True, 256))
|
|
self.assertEqual(_testcapi.call_long_compact_api(sys.maxsize),
|
|
(False, -1))
|
|
|
|
def test_long_asint(self):
|
|
PyLong_AsInt = _testcapi.PyLong_AsInt
|
|
INT_MIN = _testcapi.INT_MIN
|
|
INT_MAX = _testcapi.INT_MAX
|
|
|
|
# round trip (object -> int -> object)
|
|
for value in (INT_MIN, INT_MAX, -1, 0, 1, 123):
|
|
with self.subTest(value=value):
|
|
self.assertEqual(PyLong_AsInt(value), value)
|
|
|
|
# use __index__(), not __int__()
|
|
class MyIndex:
|
|
def __index__(self):
|
|
return 10
|
|
def __int__(self):
|
|
return 22
|
|
self.assertEqual(PyLong_AsInt(MyIndex()), 10)
|
|
|
|
# bound checking
|
|
with self.assertRaises(OverflowError):
|
|
PyLong_AsInt(INT_MIN - 1)
|
|
with self.assertRaises(OverflowError):
|
|
PyLong_AsInt(INT_MAX + 1)
|
|
|
|
# invalid type
|
|
for value in (1.0, b'2', '3'):
|
|
with self.subTest(value=value):
|
|
with self.assertRaises(TypeError):
|
|
PyLong_AsInt(value)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|