import unittest import sys import test.support as support from test.support import import_helper # Skip this test if the _testcapi module isn't available. _testcapi = import_helper.import_module('_testcapi') NULL = None class IntSubclass(int): pass class Index: def __init__(self, value): self.value = value def __index__(self): return self.value # use __index__(), not __int__() class MyIndexAndInt: def __index__(self): return 10 def __int__(self): return 22 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_check(self): # Test PyLong_Check() check = _testcapi.pylong_check self.assertTrue(check(1)) self.assertTrue(check(123456789012345678901234567890)) self.assertTrue(check(-1)) self.assertTrue(check(True)) self.assertTrue(check(IntSubclass(1))) self.assertFalse(check(1.0)) self.assertFalse(check(object())) # CRASHES check(NULL) def test_long_checkexact(self): # Test PyLong_CheckExact() check = _testcapi.pylong_checkexact self.assertTrue(check(1)) self.assertTrue(check(123456789012345678901234567890)) self.assertTrue(check(-1)) self.assertFalse(check(True)) self.assertFalse(check(IntSubclass(1))) self.assertFalse(check(1.0)) self.assertFalse(check(object())) # CRASHES check(NULL) def test_long_fromdouble(self): # Test PyLong_FromDouble() fromdouble = _testcapi.pylong_fromdouble float_max = sys.float_info.max for value in (5.0, 5.1, 5.9, -5.1, -5.9, 0.0, -0.0, float_max, -float_max): with self.subTest(value=value): self.assertEqual(fromdouble(value), int(value)) self.assertRaises(OverflowError, fromdouble, float('inf')) self.assertRaises(OverflowError, fromdouble, float('-inf')) self.assertRaises(ValueError, fromdouble, float('nan')) def test_long_fromvoidptr(self): # Test PyLong_FromVoidPtr() fromvoidptr = _testcapi.pylong_fromvoidptr obj = object() x = fromvoidptr(obj) y = fromvoidptr(NULL) self.assertIsInstance(x, int) self.assertGreaterEqual(x, 0) self.assertIsInstance(y, int) self.assertEqual(y, 0) self.assertNotEqual(x, y) def test_long_fromstring(self): # Test PyLong_FromString() fromstring = _testcapi.pylong_fromstring self.assertEqual(fromstring(b'123', 10), (123, 3)) self.assertEqual(fromstring(b'cafe', 16), (0xcafe, 4)) self.assertEqual(fromstring(b'xyz', 36), (44027, 3)) self.assertEqual(fromstring(b'123', 0), (123, 3)) self.assertEqual(fromstring(b'0xcafe', 0), (0xcafe, 6)) self.assertRaises(ValueError, fromstring, b'cafe', 0) self.assertEqual(fromstring(b'-123', 10), (-123, 4)) self.assertEqual(fromstring(b' -123 ', 10), (-123, 6)) self.assertEqual(fromstring(b'1_23', 10), (123, 4)) self.assertRaises(ValueError, fromstring, b'- 123', 10) self.assertRaises(ValueError, fromstring, b'', 10) self.assertRaises(ValueError, fromstring, b'123', 1) self.assertRaises(ValueError, fromstring, b'123', -1) self.assertRaises(ValueError, fromstring, b'123', 37) self.assertRaises(ValueError, fromstring, '١٢٣٤٥٦٧٨٩٠'.encode(), 0) self.assertRaises(ValueError, fromstring, '١٢٣٤٥٦٧٨٩٠'.encode(), 16) self.assertEqual(fromstring(b'123\x00', 0), (123, 3)) self.assertEqual(fromstring(b'123\x00456', 0), (123, 3)) self.assertEqual(fromstring(b'123\x00', 16), (0x123, 3)) self.assertEqual(fromstring(b'123\x00456', 16), (0x123, 3)) # CRASHES fromstring(NULL, 0) # CRASHES fromstring(NULL, 16) def test_long_fromunicodeobject(self): # Test PyLong_FromUnicodeObject() fromunicodeobject = _testcapi.pylong_fromunicodeobject self.assertEqual(fromunicodeobject('123', 10), 123) self.assertEqual(fromunicodeobject('cafe', 16), 0xcafe) self.assertEqual(fromunicodeobject('xyz', 36), 44027) self.assertEqual(fromunicodeobject('123', 0), 123) self.assertEqual(fromunicodeobject('0xcafe', 0), 0xcafe) self.assertRaises(ValueError, fromunicodeobject, 'cafe', 0) self.assertEqual(fromunicodeobject('-123', 10), -123) self.assertEqual(fromunicodeobject(' -123 ', 10), -123) self.assertEqual(fromunicodeobject('1_23', 10), 123) self.assertRaises(ValueError, fromunicodeobject, '- 123', 10) self.assertRaises(ValueError, fromunicodeobject, '', 10) self.assertRaises(ValueError, fromunicodeobject, '123', 1) self.assertRaises(ValueError, fromunicodeobject, '123', -1) self.assertRaises(ValueError, fromunicodeobject, '123', 37) self.assertEqual(fromunicodeobject('١٢٣٤٥٦٧٨٩٠', 0), 1234567890) self.assertEqual(fromunicodeobject('١٢٣٤٥٦٧٨٩٠', 16), 0x1234567890) self.assertRaises(ValueError, fromunicodeobject, '123\x00', 0) self.assertRaises(ValueError, fromunicodeobject, '123\x00456', 0) self.assertRaises(ValueError, fromunicodeobject, '123\x00', 16) self.assertRaises(ValueError, fromunicodeobject, '123\x00456', 16) # CRASHES fromunicodeobject(NULL, 0) # CRASHES fromunicodeobject(NULL, 16) def test_long_asint(self): # Test PyLong_AsInt() PyLong_AsInt = _testcapi.PyLong_AsInt from _testcapi import INT_MIN, 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) self.assertEqual(PyLong_AsInt(IntSubclass(42)), 42) self.assertEqual(PyLong_AsInt(Index(42)), 42) self.assertEqual(PyLong_AsInt(MyIndexAndInt()), 10) # bound checking self.assertRaises(OverflowError, PyLong_AsInt, INT_MIN - 1) self.assertRaises(OverflowError, PyLong_AsInt, INT_MAX + 1) # invalid type self.assertRaises(TypeError, PyLong_AsInt, 1.0) self.assertRaises(TypeError, PyLong_AsInt, b'2') self.assertRaises(TypeError, PyLong_AsInt, '3') self.assertRaises(SystemError, PyLong_AsInt, NULL) def test_long_aslong(self): # Test PyLong_AsLong() and PyLong_FromLong() aslong = _testcapi.pylong_aslong from _testcapi import LONG_MIN, LONG_MAX # round trip (object -> long -> object) for value in (LONG_MIN, LONG_MAX, -1, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(aslong(value), value) self.assertEqual(aslong(IntSubclass(42)), 42) self.assertEqual(aslong(Index(42)), 42) self.assertEqual(aslong(MyIndexAndInt()), 10) self.assertRaises(OverflowError, aslong, LONG_MIN - 1) self.assertRaises(OverflowError, aslong, LONG_MAX + 1) self.assertRaises(TypeError, aslong, 1.0) self.assertRaises(TypeError, aslong, b'2') self.assertRaises(TypeError, aslong, '3') self.assertRaises(SystemError, aslong, NULL) def test_long_aslongandoverflow(self): # Test PyLong_AsLongAndOverflow() aslongandoverflow = _testcapi.pylong_aslongandoverflow from _testcapi import LONG_MIN, LONG_MAX # round trip (object -> long -> object) for value in (LONG_MIN, LONG_MAX, -1, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(aslongandoverflow(value), (value, 0)) self.assertEqual(aslongandoverflow(IntSubclass(42)), (42, 0)) self.assertEqual(aslongandoverflow(Index(42)), (42, 0)) self.assertEqual(aslongandoverflow(MyIndexAndInt()), (10, 0)) self.assertEqual(aslongandoverflow(LONG_MIN - 1), (-1, -1)) self.assertEqual(aslongandoverflow(LONG_MAX + 1), (-1, 1)) # CRASHES aslongandoverflow(1.0) # CRASHES aslongandoverflow(NULL) def test_long_asunsignedlong(self): # Test PyLong_AsUnsignedLong() and PyLong_FromUnsignedLong() asunsignedlong = _testcapi.pylong_asunsignedlong from _testcapi import ULONG_MAX # round trip (object -> unsigned long -> object) for value in (ULONG_MAX, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(asunsignedlong(value), value) self.assertEqual(asunsignedlong(IntSubclass(42)), 42) self.assertRaises(TypeError, asunsignedlong, Index(42)) self.assertRaises(TypeError, asunsignedlong, MyIndexAndInt()) self.assertRaises(OverflowError, asunsignedlong, -1) self.assertRaises(OverflowError, asunsignedlong, ULONG_MAX + 1) self.assertRaises(TypeError, asunsignedlong, 1.0) self.assertRaises(TypeError, asunsignedlong, b'2') self.assertRaises(TypeError, asunsignedlong, '3') self.assertRaises(SystemError, asunsignedlong, NULL) def test_long_asunsignedlongmask(self): # Test PyLong_AsUnsignedLongMask() asunsignedlongmask = _testcapi.pylong_asunsignedlongmask from _testcapi import ULONG_MAX # round trip (object -> unsigned long -> object) for value in (ULONG_MAX, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(asunsignedlongmask(value), value) self.assertEqual(asunsignedlongmask(IntSubclass(42)), 42) self.assertEqual(asunsignedlongmask(Index(42)), 42) self.assertEqual(asunsignedlongmask(MyIndexAndInt()), 10) self.assertEqual(asunsignedlongmask(-1), ULONG_MAX) self.assertEqual(asunsignedlongmask(ULONG_MAX + 1), 0) self.assertRaises(TypeError, asunsignedlongmask, 1.0) self.assertRaises(TypeError, asunsignedlongmask, b'2') self.assertRaises(TypeError, asunsignedlongmask, '3') self.assertRaises(SystemError, asunsignedlongmask, NULL) def test_long_aslonglong(self): # Test PyLong_AsLongLong() and PyLong_FromLongLong() aslonglong = _testcapi.pylong_aslonglong from _testcapi import LLONG_MIN, LLONG_MAX # round trip (object -> long long -> object) for value in (LLONG_MIN, LLONG_MAX, -1, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(aslonglong(value), value) self.assertEqual(aslonglong(IntSubclass(42)), 42) self.assertEqual(aslonglong(Index(42)), 42) self.assertEqual(aslonglong(MyIndexAndInt()), 10) self.assertRaises(OverflowError, aslonglong, LLONG_MIN - 1) self.assertRaises(OverflowError, aslonglong, LLONG_MAX + 1) self.assertRaises(TypeError, aslonglong, 1.0) self.assertRaises(TypeError, aslonglong, b'2') self.assertRaises(TypeError, aslonglong, '3') self.assertRaises(SystemError, aslonglong, NULL) def test_long_aslonglongandoverflow(self): # Test PyLong_AsLongLongAndOverflow() aslonglongandoverflow = _testcapi.pylong_aslonglongandoverflow from _testcapi import LLONG_MIN, LLONG_MAX # round trip (object -> long long -> object) for value in (LLONG_MIN, LLONG_MAX, -1, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(aslonglongandoverflow(value), (value, 0)) self.assertEqual(aslonglongandoverflow(IntSubclass(42)), (42, 0)) self.assertEqual(aslonglongandoverflow(Index(42)), (42, 0)) self.assertEqual(aslonglongandoverflow(MyIndexAndInt()), (10, 0)) self.assertEqual(aslonglongandoverflow(LLONG_MIN - 1), (-1, -1)) self.assertEqual(aslonglongandoverflow(LLONG_MAX + 1), (-1, 1)) # CRASHES aslonglongandoverflow(1.0) # CRASHES aslonglongandoverflow(NULL) def test_long_asunsignedlonglong(self): # Test PyLong_AsUnsignedLongLong() and PyLong_FromUnsignedLongLong() asunsignedlonglong = _testcapi.pylong_asunsignedlonglong from _testcapi import ULLONG_MAX # round trip (object -> unsigned long long -> object) for value in (ULLONG_MAX, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(asunsignedlonglong(value), value) self.assertEqual(asunsignedlonglong(IntSubclass(42)), 42) self.assertRaises(TypeError, asunsignedlonglong, Index(42)) self.assertRaises(TypeError, asunsignedlonglong, MyIndexAndInt()) self.assertRaises(OverflowError, asunsignedlonglong, -1) self.assertRaises(OverflowError, asunsignedlonglong, ULLONG_MAX + 1) self.assertRaises(TypeError, asunsignedlonglong, 1.0) self.assertRaises(TypeError, asunsignedlonglong, b'2') self.assertRaises(TypeError, asunsignedlonglong, '3') self.assertRaises(SystemError, asunsignedlonglong, NULL) def test_long_asunsignedlonglongmask(self): # Test PyLong_AsUnsignedLongLongMask() asunsignedlonglongmask = _testcapi.pylong_asunsignedlonglongmask from _testcapi import ULLONG_MAX # round trip (object -> unsigned long long -> object) for value in (ULLONG_MAX, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(asunsignedlonglongmask(value), value) self.assertEqual(asunsignedlonglongmask(IntSubclass(42)), 42) self.assertEqual(asunsignedlonglongmask(Index(42)), 42) self.assertEqual(asunsignedlonglongmask(MyIndexAndInt()), 10) self.assertEqual(asunsignedlonglongmask(-1), ULLONG_MAX) self.assertEqual(asunsignedlonglongmask(ULLONG_MAX + 1), 0) self.assertRaises(TypeError, asunsignedlonglongmask, 1.0) self.assertRaises(TypeError, asunsignedlonglongmask, b'2') self.assertRaises(TypeError, asunsignedlonglongmask, '3') self.assertRaises(SystemError, asunsignedlonglongmask, NULL) def test_long_as_ssize_t(self): # Test PyLong_AsSsize_t() and PyLong_FromSsize_t() as_ssize_t = _testcapi.pylong_as_ssize_t from _testcapi import PY_SSIZE_T_MIN, PY_SSIZE_T_MAX # round trip (object -> Py_ssize_t -> object) for value in (PY_SSIZE_T_MIN, PY_SSIZE_T_MAX, -1, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(as_ssize_t(value), value) self.assertEqual(as_ssize_t(IntSubclass(42)), 42) self.assertRaises(TypeError, as_ssize_t, Index(42)) self.assertRaises(TypeError, as_ssize_t, MyIndexAndInt()) self.assertRaises(OverflowError, as_ssize_t, PY_SSIZE_T_MIN - 1) self.assertRaises(OverflowError, as_ssize_t, PY_SSIZE_T_MAX + 1) self.assertRaises(TypeError, as_ssize_t, 1.0) self.assertRaises(TypeError, as_ssize_t, b'2') self.assertRaises(TypeError, as_ssize_t, '3') self.assertRaises(SystemError, as_ssize_t, NULL) def test_long_as_size_t(self): # Test PyLong_AsSize_t() and PyLong_FromSize_t() as_size_t = _testcapi.pylong_as_size_t from _testcapi import SIZE_MAX # round trip (object -> size_t -> object) for value in (SIZE_MAX, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(as_size_t(value), value) self.assertEqual(as_size_t(IntSubclass(42)), 42) self.assertRaises(TypeError, as_size_t, Index(42)) self.assertRaises(TypeError, as_size_t, MyIndexAndInt()) self.assertRaises(OverflowError, as_size_t, -1) self.assertRaises(OverflowError, as_size_t, SIZE_MAX + 1) self.assertRaises(TypeError, as_size_t, 1.0) self.assertRaises(TypeError, as_size_t, b'2') self.assertRaises(TypeError, as_size_t, '3') self.assertRaises(SystemError, as_size_t, NULL) def test_long_asdouble(self): # Test PyLong_AsDouble() asdouble = _testcapi.pylong_asdouble MAX = int(sys.float_info.max) for value in (-MAX, MAX, -1, 0, 1, 1234): with self.subTest(value=value): self.assertEqual(asdouble(value), float(value)) self.assertIsInstance(asdouble(value), float) self.assertEqual(asdouble(IntSubclass(42)), 42.0) self.assertRaises(TypeError, asdouble, Index(42)) self.assertRaises(TypeError, asdouble, MyIndexAndInt()) self.assertRaises(OverflowError, asdouble, 2 * MAX) self.assertRaises(OverflowError, asdouble, -2 * MAX) self.assertRaises(TypeError, asdouble, 1.0) self.assertRaises(TypeError, asdouble, b'2') self.assertRaises(TypeError, asdouble, '3') self.assertRaises(SystemError, asdouble, NULL) def test_long_asvoidptr(self): # Test PyLong_AsVoidPtr() fromvoidptr = _testcapi.pylong_fromvoidptr asvoidptr = _testcapi.pylong_asvoidptr obj = object() x = fromvoidptr(obj) y = fromvoidptr(NULL) self.assertIs(asvoidptr(x), obj) self.assertIs(asvoidptr(y), NULL) self.assertIs(asvoidptr(IntSubclass(x)), obj) # negative values M = (1 << _testcapi.SIZEOF_VOID_P * 8) if x >= M//2: self.assertIs(asvoidptr(x - M), obj) if y >= M//2: self.assertIs(asvoidptr(y - M), NULL) self.assertRaises(TypeError, asvoidptr, Index(x)) self.assertRaises(TypeError, asvoidptr, object()) self.assertRaises(OverflowError, asvoidptr, 2**1000) self.assertRaises(OverflowError, asvoidptr, -2**1000) # CRASHES asvoidptr(NULL) def test_long_asnativebytes(self): import math from _testcapi import ( pylong_asnativebytes as asnativebytes, SIZE_MAX, ) # Abbreviate sizeof(Py_ssize_t) to SZ because we use it a lot SZ = int(math.ceil(math.log(SIZE_MAX + 1) / math.log(2)) / 8) MAX_SSIZE = 2 ** (SZ * 8 - 1) - 1 MAX_USIZE = 2 ** (SZ * 8) - 1 if support.verbose: print(f"SIZEOF_SIZE={SZ}\n{MAX_SSIZE=:016X}\n{MAX_USIZE=:016X}") # These tests check that the requested buffer size is correct for v, expect in [ (0, SZ), (512, SZ), (-512, SZ), (MAX_SSIZE, SZ), (MAX_USIZE, SZ + 1), (-MAX_SSIZE, SZ), (-MAX_USIZE, SZ + 1), (2**255-1, 32), (-(2**255-1), 32), (2**256-1, 33), (-(2**256-1), 33), ]: with self.subTest(f"sizeof-{v:X}"): buffer = bytearray(1) self.assertEqual(expect, asnativebytes(v, buffer, 0, -1), "PyLong_AsNativeBytes(v, NULL, 0, -1)") # Also check via the __index__ path self.assertEqual(expect, asnativebytes(Index(v), buffer, 0, -1), "PyLong_AsNativeBytes(Index(v), NULL, 0, -1)") # We request as many bytes as `expect_be` contains, and always check # the result (both big and little endian). We check the return value # independently, since the buffer should always be filled correctly even # if we need more bytes for v, expect_be, expect_n in [ (0, b'\x00', 1), (0, b'\x00' * 2, 2), (0, b'\x00' * 8, min(8, SZ)), (1, b'\x01', 1), (1, b'\x00' * 10 + b'\x01', min(11, SZ)), (42, b'\x2a', 1), (42, b'\x00' * 10 + b'\x2a', min(11, SZ)), (-1, b'\xff', 1), (-1, b'\xff' * 10, min(11, SZ)), (-42, b'\xd6', 1), (-42, b'\xff' * 10 + b'\xd6', min(11, SZ)), # Extracts 255 into a single byte, but requests sizeof(Py_ssize_t) (255, b'\xff', SZ), (255, b'\x00\xff', 2), (256, b'\x01\x00', 2), # Extracts successfully (unsigned), but requests 9 bytes (2**63, b'\x80' + b'\x00' * 7, 9), # "Extracts", but requests 9 bytes (-2**63, b'\x80' + b'\x00' * 7, 9), (2**63, b'\x00\x80' + b'\x00' * 7, 9), (-2**63, b'\xff\x80' + b'\x00' * 7, 9), (2**255-1, b'\x7f' + b'\xff' * 31, 32), (-(2**255-1), b'\x80' + b'\x00' * 30 + b'\x01', 32), # Request extra bytes, but result says we only needed 32 (-(2**255-1), b'\xff\x80' + b'\x00' * 30 + b'\x01', 32), (-(2**255-1), b'\xff\xff\x80' + b'\x00' * 30 + b'\x01', 32), # Extracting 256 bits of integer will request 33 bytes, but still # copy as many bits as possible into the buffer. So we *can* copy # into a 32-byte buffer, though negative number may be unrecoverable (2**256-1, b'\xff' * 32, 33), (2**256-1, b'\x00' + b'\xff' * 32, 33), (-(2**256-1), b'\x00' * 31 + b'\x01', 33), (-(2**256-1), b'\xff' + b'\x00' * 31 + b'\x01', 33), (-(2**256-1), b'\xff\xff' + b'\x00' * 31 + b'\x01', 33), # The classic "Windows HRESULT as negative number" case # HRESULT hr; # PyLong_CopyBits(<-2147467259>, &hr, sizeof(HRESULT)) # assert(hr == E_FAIL) (-2147467259, b'\x80\x00\x40\x05', 4), ]: with self.subTest(f"{v:X}-{len(expect_be)}bytes"): n = len(expect_be) buffer = bytearray(n) expect_le = expect_be[::-1] self.assertEqual(expect_n, asnativebytes(v, buffer, n, 0), f"PyLong_AsNativeBytes(v, buffer, {n}, )") self.assertEqual(expect_be, buffer[:n], "") self.assertEqual(expect_n, asnativebytes(v, buffer, n, 1), f"PyLong_AsNativeBytes(v, buffer, {n}, )") self.assertEqual(expect_le, buffer[:n], "") # Check a few error conditions. These are validated in code, but are # unspecified in docs, so if we make changes to the implementation, it's # fine to just update these tests rather than preserve the behaviour. with self.assertRaises(SystemError): asnativebytes(1, buffer, 0, 2) with self.assertRaises(TypeError): asnativebytes('not a number', buffer, 0, -1) def test_long_fromnativebytes(self): import math from _testcapi import ( pylong_fromnativebytes as fromnativebytes, SIZE_MAX, ) # Abbreviate sizeof(Py_ssize_t) to SZ because we use it a lot SZ = int(math.ceil(math.log(SIZE_MAX + 1) / math.log(2)) / 8) MAX_SSIZE = 2 ** (SZ * 8 - 1) - 1 MAX_USIZE = 2 ** (SZ * 8) - 1 for v_be, expect_s, expect_u in [ (b'\x00', 0, 0), (b'\x01', 1, 1), (b'\xff', -1, 255), (b'\x00\xff', 255, 255), (b'\xff\xff', -1, 65535), ]: with self.subTest(f"{expect_s}-{expect_u:X}-{len(v_be)}bytes"): n = len(v_be) v_le = v_be[::-1] self.assertEqual(expect_s, fromnativebytes(v_be, n, 0, 1), f"PyLong_FromNativeBytes(buffer, {n}, )") self.assertEqual(expect_s, fromnativebytes(v_le, n, 1, 1), f"PyLong_FromNativeBytes(buffer, {n}, )") self.assertEqual(expect_u, fromnativebytes(v_be, n, 0, 0), f"PyLong_FromUnsignedNativeBytes(buffer, {n}, )") self.assertEqual(expect_u, fromnativebytes(v_le, n, 1, 0), f"PyLong_FromUnsignedNativeBytes(buffer, {n}, )") # Check native endian when the result would be the same either # way and we can test it. if v_be == v_le: self.assertEqual(expect_s, fromnativebytes(v_be, n, -1, 1), f"PyLong_FromNativeBytes(buffer, {n}, )") self.assertEqual(expect_u, fromnativebytes(v_be, n, -1, 0), f"PyLong_FromUnsignedNativeBytes(buffer, {n}, )") if __name__ == "__main__": unittest.main()