468 lines
18 KiB
Python
468 lines
18 KiB
Python
import sys
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import unittest
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from test import test_support
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from test.test_support import run_unittest, have_unicode
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import math
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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.maxint), sys.maxint),
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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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]
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if have_unicode:
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L += [
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(unicode('0'), 0),
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(unicode('1'), 1),
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(unicode('9'), 9),
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(unicode('10'), 10),
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(unicode('99'), 99),
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(unicode('100'), 100),
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(unicode('314'), 314),
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(unicode(' 314'), 314),
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(unicode('\u0663\u0661\u0664 ','raw-unicode-escape'), 314),
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(unicode(' \t\t 314 \t\t '), 314),
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(unicode(' 1x'), ValueError),
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(unicode(' 1 '), 1),
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(unicode(' 1\02 '), ValueError),
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(unicode(''), ValueError),
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(unicode(' '), ValueError),
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(unicode(' \t\t '), ValueError),
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(unichr(0x200), ValueError),
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]
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class IntLongCommonTests(object):
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"""Mixin of test cases to share between both test_int and test_long."""
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# Change to int or long in the TestCase subclass.
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ntype = None
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def test_no_args(self):
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self.assertEqual(self.ntype(), 0)
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def test_keyword_args(self):
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# Test invoking constructor using keyword arguments.
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self.assertEqual(self.ntype(x=1.2), 1)
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self.assertEqual(self.ntype('100', base=2), 4)
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self.assertEqual(self.ntype(x='100', base=2), 4)
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self.assertRaises(TypeError, self.ntype, base=10)
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self.assertRaises(TypeError, self.ntype, base=0)
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class IntTestCases(IntLongCommonTests, unittest.TestCase):
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ntype = int
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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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self.assertEqual(int(314L), 314)
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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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# Different base:
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self.assertEqual(int("10",16), 16L)
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if have_unicode:
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self.assertEqual(int(unicode("10"),16), 16L)
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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 v:
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pass
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s = repr(-1-sys.maxint)
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x = int(s)
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self.assertEqual(x+1, -sys.maxint)
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self.assertIsInstance(x, int)
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# should return long
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self.assertEqual(int(s[1:]), sys.maxint+1)
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# should return long
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x = int(1e100)
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self.assertIsInstance(x, long)
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x = int(-1e100)
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self.assertIsInstance(x, long)
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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.maxint
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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, long)
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if have_unicode:
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x = int(unichr(0x661) * 600)
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self.assertIsInstance(x, long)
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self.assertRaises(TypeError, int, 1, 12)
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self.assertEqual(int('0123', 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), 4294967296L)
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self.assertEqual(int('102002022201221111211', 3), 4294967296L)
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self.assertEqual(int('10000000000000000', 4), 4294967296L)
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self.assertEqual(int('32244002423141', 5), 4294967296L)
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self.assertEqual(int('1550104015504', 6), 4294967296L)
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self.assertEqual(int('211301422354', 7), 4294967296L)
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self.assertEqual(int('40000000000', 8), 4294967296L)
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self.assertEqual(int('12068657454', 9), 4294967296L)
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self.assertEqual(int('4294967296', 10), 4294967296L)
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self.assertEqual(int('1904440554', 11), 4294967296L)
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self.assertEqual(int('9ba461594', 12), 4294967296L)
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self.assertEqual(int('535a79889', 13), 4294967296L)
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self.assertEqual(int('2ca5b7464', 14), 4294967296L)
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self.assertEqual(int('1a20dcd81', 15), 4294967296L)
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self.assertEqual(int('100000000', 16), 4294967296L)
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self.assertEqual(int('a7ffda91', 17), 4294967296L)
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self.assertEqual(int('704he7g4', 18), 4294967296L)
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self.assertEqual(int('4f5aff66', 19), 4294967296L)
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self.assertEqual(int('3723ai4g', 20), 4294967296L)
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self.assertEqual(int('281d55i4', 21), 4294967296L)
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self.assertEqual(int('1fj8b184', 22), 4294967296L)
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self.assertEqual(int('1606k7ic', 23), 4294967296L)
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self.assertEqual(int('mb994ag', 24), 4294967296L)
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self.assertEqual(int('hek2mgl', 25), 4294967296L)
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self.assertEqual(int('dnchbnm', 26), 4294967296L)
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self.assertEqual(int('b28jpdm', 27), 4294967296L)
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self.assertEqual(int('8pfgih4', 28), 4294967296L)
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self.assertEqual(int('76beigg', 29), 4294967296L)
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self.assertEqual(int('5qmcpqg', 30), 4294967296L)
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self.assertEqual(int('4q0jto4', 31), 4294967296L)
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self.assertEqual(int('4000000', 32), 4294967296L)
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self.assertEqual(int('3aokq94', 33), 4294967296L)
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self.assertEqual(int('2qhxjli', 34), 4294967296L)
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self.assertEqual(int('2br45qb', 35), 4294967296L)
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self.assertEqual(int('1z141z4', 36), 4294967296L)
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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(' 0123 ', 0), 83)
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self.assertEqual(int(' 0123 ', 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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self.assertEqual(int('0', 0), 0)
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self.assertEqual(int('+0', 0), 0)
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self.assertEqual(int('-0', 0), 0)
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self.assertEqual(int('00', 0), 0)
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self.assertRaises(ValueError, int, '08', 0)
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self.assertRaises(ValueError, int, '-012395', 0)
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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), 4294967297L)
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self.assertEqual(int('102002022201221111212', 3), 4294967297L)
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self.assertEqual(int('10000000000000001', 4), 4294967297L)
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self.assertEqual(int('32244002423142', 5), 4294967297L)
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self.assertEqual(int('1550104015505', 6), 4294967297L)
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self.assertEqual(int('211301422355', 7), 4294967297L)
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self.assertEqual(int('40000000001', 8), 4294967297L)
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self.assertEqual(int('12068657455', 9), 4294967297L)
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self.assertEqual(int('4294967297', 10), 4294967297L)
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self.assertEqual(int('1904440555', 11), 4294967297L)
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self.assertEqual(int('9ba461595', 12), 4294967297L)
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self.assertEqual(int('535a7988a', 13), 4294967297L)
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self.assertEqual(int('2ca5b7465', 14), 4294967297L)
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self.assertEqual(int('1a20dcd82', 15), 4294967297L)
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self.assertEqual(int('100000001', 16), 4294967297L)
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self.assertEqual(int('a7ffda92', 17), 4294967297L)
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self.assertEqual(int('704he7g5', 18), 4294967297L)
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self.assertEqual(int('4f5aff67', 19), 4294967297L)
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self.assertEqual(int('3723ai4h', 20), 4294967297L)
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self.assertEqual(int('281d55i5', 21), 4294967297L)
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self.assertEqual(int('1fj8b185', 22), 4294967297L)
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self.assertEqual(int('1606k7id', 23), 4294967297L)
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self.assertEqual(int('mb994ah', 24), 4294967297L)
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self.assertEqual(int('hek2mgm', 25), 4294967297L)
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self.assertEqual(int('dnchbnn', 26), 4294967297L)
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self.assertEqual(int('b28jpdn', 27), 4294967297L)
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self.assertEqual(int('8pfgih5', 28), 4294967297L)
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self.assertEqual(int('76beigh', 29), 4294967297L)
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self.assertEqual(int('5qmcpqh', 30), 4294967297L)
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self.assertEqual(int('4q0jto5', 31), 4294967297L)
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self.assertEqual(int('4000001', 32), 4294967297L)
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self.assertEqual(int('3aokq95', 33), 4294967297L)
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self.assertEqual(int('2qhxjlj', 34), 4294967297L)
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self.assertEqual(int('2br45qc', 35), 4294967297L)
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self.assertEqual(int('1z141z5', 36), 4294967297L)
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def test_bit_length(self):
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tiny = 1e-10
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for x in xrange(-65000, 65000):
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k = x.bit_length()
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# Check equivalence with Python version
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self.assertEqual(k, len(bin(x).lstrip('-0b')))
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# Behaviour as specified in the docs
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if x != 0:
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self.assertTrue(2**(k-1) <= abs(x) < 2**k)
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else:
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self.assertEqual(k, 0)
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# Alternative definition: x.bit_length() == 1 + floor(log_2(x))
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if x != 0:
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# When x is an exact power of 2, numeric errors can
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# cause floor(log(x)/log(2)) to be one too small; for
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# small x this can be fixed by adding a small quantity
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# to the quotient before taking the floor.
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self.assertEqual(k, 1 + math.floor(
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math.log(abs(x))/math.log(2) + tiny))
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self.assertEqual((0).bit_length(), 0)
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self.assertEqual((1).bit_length(), 1)
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self.assertEqual((-1).bit_length(), 1)
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self.assertEqual((2).bit_length(), 2)
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self.assertEqual((-2).bit_length(), 2)
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for i in [2, 3, 15, 16, 17, 31, 32, 33, 63, 64]:
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a = 2**i
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self.assertEqual((a-1).bit_length(), i)
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self.assertEqual((1-a).bit_length(), i)
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self.assertEqual((a).bit_length(), i+1)
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self.assertEqual((-a).bit_length(), i+1)
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self.assertEqual((a+1).bit_length(), i+1)
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self.assertEqual((-a-1).bit_length(), i+1)
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@unittest.skipUnless(float.__getformat__("double").startswith("IEEE"),
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"test requires IEEE 754 doubles")
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def test_float_conversion(self):
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# values exactly representable as floats
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exact_values = [-2, -1, 0, 1, 2, 2**52, 2**53-1, 2**53, 2**53+2,
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2**53+4, 2**54-4, 2**54-2, 2**63, -2**63, 2**64,
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-2**64, 10**20, 10**21, 10**22]
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for value in exact_values:
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self.assertEqual(int(float(int(value))), value)
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# test round-half-to-even
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self.assertEqual(int(float(2**53+1)), 2**53)
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self.assertEqual(int(float(2**53+2)), 2**53+2)
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self.assertEqual(int(float(2**53+3)), 2**53+4)
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self.assertEqual(int(float(2**53+5)), 2**53+4)
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self.assertEqual(int(float(2**53+6)), 2**53+6)
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self.assertEqual(int(float(2**53+7)), 2**53+8)
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self.assertEqual(int(float(-2**53-1)), -2**53)
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self.assertEqual(int(float(-2**53-2)), -2**53-2)
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self.assertEqual(int(float(-2**53-3)), -2**53-4)
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self.assertEqual(int(float(-2**53-5)), -2**53-4)
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self.assertEqual(int(float(-2**53-6)), -2**53-6)
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self.assertEqual(int(float(-2**53-7)), -2**53-8)
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self.assertEqual(int(float(2**54-2)), 2**54-2)
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self.assertEqual(int(float(2**54-1)), 2**54)
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self.assertEqual(int(float(2**54+2)), 2**54)
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self.assertEqual(int(float(2**54+3)), 2**54+4)
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self.assertEqual(int(float(2**54+5)), 2**54+4)
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self.assertEqual(int(float(2**54+6)), 2**54+8)
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self.assertEqual(int(float(2**54+10)), 2**54+8)
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self.assertEqual(int(float(2**54+11)), 2**54+12)
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def test_valid_non_numeric_input_types_for_x(self):
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# Test possible valid non-numeric types for x, including subclasses
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# of the allowed built-in types.
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class CustomStr(str): pass
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values = ['100', CustomStr('100')]
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if have_unicode:
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class CustomUnicode(unicode): pass
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values += [unicode('100'), CustomUnicode(unicode('100'))]
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for x in values:
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msg = 'x has value %s and type %s' % (x, type(x).__name__)
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try:
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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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except TypeError, err:
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raise AssertionError('For %s got TypeError: %s' %
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(type(x).__name__, err))
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def test_error_on_string_float_for_x(self):
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self.assertRaises(ValueError, int, '1.2')
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def test_error_on_bytearray_for_x(self):
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self.assertRaises(TypeError, int, bytearray('100'), 2)
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def test_error_on_invalid_int_bases(self):
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for base in [-1, 1, 1000]:
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self.assertRaises(ValueError, int, '100', base)
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def test_error_on_string_base(self):
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self.assertRaises(TypeError, int, 100, base='foo')
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@test_support.cpython_only
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def test_small_ints(self):
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self.assertIs(int('10'), 10)
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self.assertIs(int('-1'), -1)
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if have_unicode:
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self.assertIs(int(u'10'), 10)
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self.assertIs(int(u'-1'), -1)
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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(AttributeError, 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 42L
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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()), 42L)
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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):
|
|
return 42
|
|
self.assertEqual(int(JustTrunc()), 42)
|
|
|
|
for trunc_result_base in (object, Classic):
|
|
class Integral(trunc_result_base):
|
|
def __int__(self):
|
|
return 42
|
|
|
|
class TruncReturnsNonInt(base):
|
|
def __trunc__(self):
|
|
return Integral()
|
|
self.assertEqual(int(TruncReturnsNonInt()), 42)
|
|
|
|
class NonIntegral(trunc_result_base):
|
|
def __trunc__(self):
|
|
# Check that we avoid infinite recursion.
|
|
return NonIntegral()
|
|
|
|
class TruncReturnsNonIntegral(base):
|
|
def __trunc__(self):
|
|
return NonIntegral()
|
|
try:
|
|
int(TruncReturnsNonIntegral())
|
|
except TypeError as e:
|
|
self.assertEqual(str(e),
|
|
"__trunc__ returned non-Integral"
|
|
" (type NonIntegral)")
|
|
else:
|
|
self.fail("Failed to raise TypeError with %s" %
|
|
((base, trunc_result_base),))
|
|
|
|
def test_main():
|
|
run_unittest(IntTestCases)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|