mirror of https://github.com/python/cpython
395 lines
15 KiB
Python
395 lines
15 KiB
Python
import sys
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import unittest
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from test import support
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L = [
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('0', 0),
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('1', 1),
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('9', 9),
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('10', 10),
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('99', 99),
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('100', 100),
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('314', 314),
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(' 314', 314),
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('314 ', 314),
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(' \t\t 314 \t\t ', 314),
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(repr(sys.maxsize), sys.maxsize),
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(' 1x', ValueError),
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(' 1 ', 1),
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(' 1\02 ', ValueError),
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('', ValueError),
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(' ', ValueError),
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(' \t\t ', ValueError),
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("\u0200", ValueError)
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]
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class IntTestCases(unittest.TestCase):
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def test_basic(self):
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self.assertEqual(int(314), 314)
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self.assertEqual(int(3.14), 3)
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# Check that conversion from float truncates towards zero
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self.assertEqual(int(-3.14), -3)
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self.assertEqual(int(3.9), 3)
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self.assertEqual(int(-3.9), -3)
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self.assertEqual(int(3.5), 3)
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self.assertEqual(int(-3.5), -3)
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self.assertEqual(int("-3"), -3)
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self.assertEqual(int(" -3 "), -3)
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self.assertEqual(int("\N{EM SPACE}-3\N{EN SPACE}"), -3)
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# Different base:
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self.assertEqual(int("10",16), 16)
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# Test conversion from strings and various anomalies
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for s, v in L:
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for sign in "", "+", "-":
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for prefix in "", " ", "\t", " \t\t ":
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ss = prefix + sign + s
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vv = v
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if sign == "-" and v is not ValueError:
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vv = -v
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try:
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self.assertEqual(int(ss), vv)
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except ValueError:
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pass
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s = repr(-1-sys.maxsize)
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x = int(s)
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self.assertEqual(x+1, -sys.maxsize)
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self.assertIsInstance(x, int)
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# should return int
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self.assertEqual(int(s[1:]), sys.maxsize+1)
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# should return int
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x = int(1e100)
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self.assertIsInstance(x, int)
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x = int(-1e100)
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self.assertIsInstance(x, int)
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# SF bug 434186: 0x80000000/2 != 0x80000000>>1.
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# Worked by accident in Windows release build, but failed in debug build.
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# Failed in all Linux builds.
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x = -1-sys.maxsize
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self.assertEqual(x >> 1, x//2)
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self.assertRaises(ValueError, int, '123\0')
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self.assertRaises(ValueError, int, '53', 40)
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# SF bug 1545497: embedded NULs were not detected with
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# explicit base
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self.assertRaises(ValueError, int, '123\0', 10)
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self.assertRaises(ValueError, int, '123\x00 245', 20)
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x = int('1' * 600)
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self.assertIsInstance(x, int)
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self.assertRaises(TypeError, int, 1, 12)
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self.assertEqual(int('0o123', 0), 83)
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self.assertEqual(int('0x123', 16), 291)
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# Bug 1679: "0x" is not a valid hex literal
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self.assertRaises(ValueError, int, "0x", 16)
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self.assertRaises(ValueError, int, "0x", 0)
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self.assertRaises(ValueError, int, "0o", 8)
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self.assertRaises(ValueError, int, "0o", 0)
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self.assertRaises(ValueError, int, "0b", 2)
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self.assertRaises(ValueError, int, "0b", 0)
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# SF bug 1334662: int(string, base) wrong answers
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# Various representations of 2**32 evaluated to 0
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# rather than 2**32 in previous versions
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self.assertEqual(int('100000000000000000000000000000000', 2), 4294967296)
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self.assertEqual(int('102002022201221111211', 3), 4294967296)
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self.assertEqual(int('10000000000000000', 4), 4294967296)
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self.assertEqual(int('32244002423141', 5), 4294967296)
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self.assertEqual(int('1550104015504', 6), 4294967296)
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self.assertEqual(int('211301422354', 7), 4294967296)
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self.assertEqual(int('40000000000', 8), 4294967296)
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self.assertEqual(int('12068657454', 9), 4294967296)
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self.assertEqual(int('4294967296', 10), 4294967296)
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self.assertEqual(int('1904440554', 11), 4294967296)
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self.assertEqual(int('9ba461594', 12), 4294967296)
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self.assertEqual(int('535a79889', 13), 4294967296)
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self.assertEqual(int('2ca5b7464', 14), 4294967296)
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self.assertEqual(int('1a20dcd81', 15), 4294967296)
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self.assertEqual(int('100000000', 16), 4294967296)
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self.assertEqual(int('a7ffda91', 17), 4294967296)
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self.assertEqual(int('704he7g4', 18), 4294967296)
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self.assertEqual(int('4f5aff66', 19), 4294967296)
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self.assertEqual(int('3723ai4g', 20), 4294967296)
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self.assertEqual(int('281d55i4', 21), 4294967296)
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self.assertEqual(int('1fj8b184', 22), 4294967296)
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self.assertEqual(int('1606k7ic', 23), 4294967296)
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self.assertEqual(int('mb994ag', 24), 4294967296)
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self.assertEqual(int('hek2mgl', 25), 4294967296)
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self.assertEqual(int('dnchbnm', 26), 4294967296)
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self.assertEqual(int('b28jpdm', 27), 4294967296)
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self.assertEqual(int('8pfgih4', 28), 4294967296)
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self.assertEqual(int('76beigg', 29), 4294967296)
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self.assertEqual(int('5qmcpqg', 30), 4294967296)
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self.assertEqual(int('4q0jto4', 31), 4294967296)
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self.assertEqual(int('4000000', 32), 4294967296)
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self.assertEqual(int('3aokq94', 33), 4294967296)
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self.assertEqual(int('2qhxjli', 34), 4294967296)
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self.assertEqual(int('2br45qb', 35), 4294967296)
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self.assertEqual(int('1z141z4', 36), 4294967296)
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# tests with base 0
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# this fails on 3.0, but in 2.x the old octal syntax is allowed
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self.assertEqual(int(' 0o123 ', 0), 83)
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self.assertEqual(int(' 0o123 ', 0), 83)
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self.assertEqual(int('000', 0), 0)
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self.assertEqual(int('0o123', 0), 83)
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self.assertEqual(int('0x123', 0), 291)
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self.assertEqual(int('0b100', 0), 4)
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self.assertEqual(int(' 0O123 ', 0), 83)
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self.assertEqual(int(' 0X123 ', 0), 291)
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self.assertEqual(int(' 0B100 ', 0), 4)
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# without base still base 10
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self.assertEqual(int('0123'), 123)
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self.assertEqual(int('0123', 10), 123)
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# tests with prefix and base != 0
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self.assertEqual(int('0x123', 16), 291)
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self.assertEqual(int('0o123', 8), 83)
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self.assertEqual(int('0b100', 2), 4)
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self.assertEqual(int('0X123', 16), 291)
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self.assertEqual(int('0O123', 8), 83)
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self.assertEqual(int('0B100', 2), 4)
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# the code has special checks for the first character after the
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# type prefix
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self.assertRaises(ValueError, int, '0b2', 2)
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self.assertRaises(ValueError, int, '0b02', 2)
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self.assertRaises(ValueError, int, '0B2', 2)
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self.assertRaises(ValueError, int, '0B02', 2)
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self.assertRaises(ValueError, int, '0o8', 8)
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self.assertRaises(ValueError, int, '0o08', 8)
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self.assertRaises(ValueError, int, '0O8', 8)
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self.assertRaises(ValueError, int, '0O08', 8)
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self.assertRaises(ValueError, int, '0xg', 16)
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self.assertRaises(ValueError, int, '0x0g', 16)
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self.assertRaises(ValueError, int, '0Xg', 16)
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self.assertRaises(ValueError, int, '0X0g', 16)
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# SF bug 1334662: int(string, base) wrong answers
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# Checks for proper evaluation of 2**32 + 1
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self.assertEqual(int('100000000000000000000000000000001', 2), 4294967297)
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self.assertEqual(int('102002022201221111212', 3), 4294967297)
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self.assertEqual(int('10000000000000001', 4), 4294967297)
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self.assertEqual(int('32244002423142', 5), 4294967297)
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self.assertEqual(int('1550104015505', 6), 4294967297)
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self.assertEqual(int('211301422355', 7), 4294967297)
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self.assertEqual(int('40000000001', 8), 4294967297)
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self.assertEqual(int('12068657455', 9), 4294967297)
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self.assertEqual(int('4294967297', 10), 4294967297)
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self.assertEqual(int('1904440555', 11), 4294967297)
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self.assertEqual(int('9ba461595', 12), 4294967297)
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self.assertEqual(int('535a7988a', 13), 4294967297)
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self.assertEqual(int('2ca5b7465', 14), 4294967297)
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self.assertEqual(int('1a20dcd82', 15), 4294967297)
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self.assertEqual(int('100000001', 16), 4294967297)
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self.assertEqual(int('a7ffda92', 17), 4294967297)
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self.assertEqual(int('704he7g5', 18), 4294967297)
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self.assertEqual(int('4f5aff67', 19), 4294967297)
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self.assertEqual(int('3723ai4h', 20), 4294967297)
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self.assertEqual(int('281d55i5', 21), 4294967297)
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self.assertEqual(int('1fj8b185', 22), 4294967297)
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self.assertEqual(int('1606k7id', 23), 4294967297)
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self.assertEqual(int('mb994ah', 24), 4294967297)
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self.assertEqual(int('hek2mgm', 25), 4294967297)
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self.assertEqual(int('dnchbnn', 26), 4294967297)
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self.assertEqual(int('b28jpdn', 27), 4294967297)
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self.assertEqual(int('8pfgih5', 28), 4294967297)
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self.assertEqual(int('76beigh', 29), 4294967297)
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self.assertEqual(int('5qmcpqh', 30), 4294967297)
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self.assertEqual(int('4q0jto5', 31), 4294967297)
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self.assertEqual(int('4000001', 32), 4294967297)
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self.assertEqual(int('3aokq95', 33), 4294967297)
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self.assertEqual(int('2qhxjlj', 34), 4294967297)
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self.assertEqual(int('2br45qc', 35), 4294967297)
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self.assertEqual(int('1z141z5', 36), 4294967297)
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@support.cpython_only
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def test_small_ints(self):
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# Bug #3236: Return small longs from PyLong_FromString
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self.assertIs(int('10'), 10)
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self.assertIs(int('-1'), -1)
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self.assertIs(int(b'10'), 10)
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self.assertIs(int(b'-1'), -1)
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def test_no_args(self):
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self.assertEqual(int(), 0)
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def test_keyword_args(self):
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# Test invoking int() using keyword arguments.
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self.assertEqual(int(x=1.2), 1)
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self.assertEqual(int('100', base=2), 4)
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self.assertEqual(int(x='100', base=2), 4)
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self.assertRaises(TypeError, int, base=10)
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self.assertRaises(TypeError, int, base=0)
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def test_int_base_limits(self):
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"""Testing the supported limits of the int() base parameter."""
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self.assertEqual(int('0', 5), 0)
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with self.assertRaises(ValueError):
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int('0', 1)
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with self.assertRaises(ValueError):
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int('0', 37)
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with self.assertRaises(ValueError):
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int('0', -909) # An old magic value base from Python 2.
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with self.assertRaises(ValueError):
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int('0', base=0-(2**234))
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with self.assertRaises(ValueError):
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int('0', base=2**234)
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# Bases 2 through 36 are supported.
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for base in range(2,37):
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self.assertEqual(int('0', base=base), 0)
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def test_int_base_bad_types(self):
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"""Not integer types are not valid bases; issue16772."""
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with self.assertRaises(TypeError):
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int('0', 5.5)
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with self.assertRaises(TypeError):
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int('0', 5.0)
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def test_non_numeric_input_types(self):
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# Test possible non-numeric types for the argument x, including
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# subclasses of the explicitly documented accepted types.
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class CustomStr(str): pass
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class CustomBytes(bytes): pass
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class CustomByteArray(bytearray): pass
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values = [b'100',
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bytearray(b'100'),
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CustomStr('100'),
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CustomBytes(b'100'),
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CustomByteArray(b'100')]
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for x in values:
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msg = 'x has type %s' % type(x).__name__
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self.assertEqual(int(x), 100, msg=msg)
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self.assertEqual(int(x, 2), 4, msg=msg)
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def test_string_float(self):
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self.assertRaises(ValueError, int, '1.2')
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def test_intconversion(self):
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# Test __int__()
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class ClassicMissingMethods:
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pass
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self.assertRaises(TypeError, int, ClassicMissingMethods())
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class MissingMethods(object):
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pass
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self.assertRaises(TypeError, int, MissingMethods())
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class Foo0:
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def __int__(self):
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return 42
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class Foo1(object):
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def __int__(self):
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return 42
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class Foo2(int):
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def __int__(self):
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return 42
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class Foo3(int):
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def __int__(self):
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return self
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class Foo4(int):
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def __int__(self):
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return 42
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class Foo5(int):
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def __int__(self):
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return 42.
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self.assertEqual(int(Foo0()), 42)
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self.assertEqual(int(Foo1()), 42)
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self.assertEqual(int(Foo2()), 42)
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self.assertEqual(int(Foo3()), 0)
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self.assertEqual(int(Foo4()), 42)
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self.assertRaises(TypeError, int, Foo5())
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class Classic:
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pass
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for base in (object, Classic):
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class IntOverridesTrunc(base):
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def __int__(self):
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return 42
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def __trunc__(self):
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return -12
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self.assertEqual(int(IntOverridesTrunc()), 42)
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class JustTrunc(base):
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def __trunc__(self):
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return 42
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self.assertEqual(int(JustTrunc()), 42)
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for trunc_result_base in (object, Classic):
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class Integral(trunc_result_base):
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def __int__(self):
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return 42
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class TruncReturnsNonInt(base):
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def __trunc__(self):
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return Integral()
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self.assertEqual(int(TruncReturnsNonInt()), 42)
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class NonIntegral(trunc_result_base):
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def __trunc__(self):
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# Check that we avoid infinite recursion.
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return NonIntegral()
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class TruncReturnsNonIntegral(base):
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def __trunc__(self):
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return NonIntegral()
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try:
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int(TruncReturnsNonIntegral())
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except TypeError as e:
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self.assertEqual(str(e),
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"__trunc__ returned non-Integral"
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" (type NonIntegral)")
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else:
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self.fail("Failed to raise TypeError with %s" %
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((base, trunc_result_base),))
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# Regression test for bugs.python.org/issue16060.
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class BadInt(trunc_result_base):
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def __int__(self):
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return 42.0
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class TruncReturnsBadInt(base):
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def __trunc__(self):
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return BadInt()
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with self.assertRaises(TypeError):
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int(TruncReturnsBadInt())
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def test_error_message(self):
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testlist = ('\xbd', '123\xbd', ' 123 456 ')
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for s in testlist:
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try:
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int(s)
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except ValueError as e:
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self.assertIn(s.strip(), e.args[0])
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else:
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self.fail("Expected int(%r) to raise a ValueError", s)
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def test_main():
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support.run_unittest(IntTestCases)
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if __name__ == "__main__":
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test_main()
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