diff options
Diffstat (limited to 'Lib/test/test_int.py')
| -rw-r--r-- | Lib/test/test_int.py | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/Lib/test/test_int.py b/Lib/test/test_int.py new file mode 100644 index 0000000..91d5273 --- /dev/null +++ b/Lib/test/test_int.py @@ -0,0 +1,304 @@ +import sys + +import unittest +from test.test_support import run_unittest + +L = [ + ('0', 0), + ('1', 1), + ('9', 9), + ('10', 10), + ('99', 99), + ('100', 100), + ('314', 314), + (' 314', 314), + ('314 ', 314), + (' \t\t 314 \t\t ', 314), + (repr(sys.maxsize), sys.maxsize), + (' 1x', ValueError), + (' 1 ', 1), + (' 1\02 ', ValueError), + ('', ValueError), + (' ', ValueError), + (' \t\t ', ValueError) +] + +class IntTestCases(unittest.TestCase): + + def test_basic(self): + self.assertEqual(int(314), 314) + self.assertEqual(int(3.14), 3) + # Check that conversion from float truncates towards zero + self.assertEqual(int(-3.14), -3) + self.assertEqual(int(3.9), 3) + self.assertEqual(int(-3.9), -3) + self.assertEqual(int(3.5), 3) + self.assertEqual(int(-3.5), -3) + # Different base: + self.assertEqual(int("10",16), 16) + # Test conversion from strings and various anomalies + for s, v in L: + for sign in "", "+", "-": + for prefix in "", " ", "\t", " \t\t ": + ss = prefix + sign + s + vv = v + if sign == "-" and v is not ValueError: + vv = -v + try: + self.assertEqual(int(ss), vv) + except ValueError: + pass + + s = repr(-1-sys.maxsize) + x = int(s) + self.assertEqual(x+1, -sys.maxsize) + self.assert_(isinstance(x, int)) + # should return long + self.assertEqual(int(s[1:]), sys.maxsize+1) + + # should return long + x = int(1e100) + self.assert_(isinstance(x, int)) + x = int(-1e100) + self.assert_(isinstance(x, int)) + + + # SF bug 434186: 0x80000000/2 != 0x80000000>>1. + # Worked by accident in Windows release build, but failed in debug build. + # Failed in all Linux builds. + x = -1-sys.maxsize + self.assertEqual(x >> 1, x//2) + + self.assertRaises(ValueError, int, '123\0') + self.assertRaises(ValueError, int, '53', 40) + + # SF bug 1545497: embedded NULs were not detected with + # explicit base + self.assertRaises(ValueError, int, '123\0', 10) + self.assertRaises(ValueError, int, '123\x00 245', 20) + + x = int('1' * 600) + self.assert_(isinstance(x, int)) + + self.assertRaises(TypeError, int, 1, 12) + + self.assertEqual(int('0o123', 0), 83) + self.assertEqual(int('0x123', 16), 291) + + # Bug 1679: "0x" is not a valid hex literal + self.assertRaises(ValueError, int, "0x", 16) + self.assertRaises(ValueError, int, "0x", 0) + + self.assertRaises(ValueError, int, "0o", 8) + self.assertRaises(ValueError, int, "0o", 0) + + self.assertRaises(ValueError, int, "0b", 2) + self.assertRaises(ValueError, int, "0b", 0) + + + # SF bug 1334662: int(string, base) wrong answers + # Various representations of 2**32 evaluated to 0 + # rather than 2**32 in previous versions + + self.assertEqual(int('100000000000000000000000000000000', 2), 4294967296) + self.assertEqual(int('102002022201221111211', 3), 4294967296) + self.assertEqual(int('10000000000000000', 4), 4294967296) + self.assertEqual(int('32244002423141', 5), 4294967296) + self.assertEqual(int('1550104015504', 6), 4294967296) + self.assertEqual(int('211301422354', 7), 4294967296) + self.assertEqual(int('40000000000', 8), 4294967296) + self.assertEqual(int('12068657454', 9), 4294967296) + self.assertEqual(int('4294967296', 10), 4294967296) + self.assertEqual(int('1904440554', 11), 4294967296) + self.assertEqual(int('9ba461594', 12), 4294967296) + self.assertEqual(int('535a79889', 13), 4294967296) + self.assertEqual(int('2ca5b7464', 14), 4294967296) + self.assertEqual(int('1a20dcd81', 15), 4294967296) + self.assertEqual(int('100000000', 16), 4294967296) + self.assertEqual(int('a7ffda91', 17), 4294967296) + self.assertEqual(int('704he7g4', 18), 4294967296) + self.assertEqual(int('4f5aff66', 19), 4294967296) + self.assertEqual(int('3723ai4g', 20), 4294967296) + self.assertEqual(int('281d55i4', 21), 4294967296) + self.assertEqual(int('1fj8b184', 22), 4294967296) + self.assertEqual(int('1606k7ic', 23), 4294967296) + self.assertEqual(int('mb994ag', 24), 4294967296) + self.assertEqual(int('hek2mgl', 25), 4294967296) + self.assertEqual(int('dnchbnm', 26), 4294967296) + self.assertEqual(int('b28jpdm', 27), 4294967296) + self.assertEqual(int('8pfgih4', 28), 4294967296) + self.assertEqual(int('76beigg', 29), 4294967296) + self.assertEqual(int('5qmcpqg', 30), 4294967296) + self.assertEqual(int('4q0jto4', 31), 4294967296) + self.assertEqual(int('4000000', 32), 4294967296) + self.assertEqual(int('3aokq94', 33), 4294967296) + self.assertEqual(int('2qhxjli', 34), 4294967296) + self.assertEqual(int('2br45qb', 35), 4294967296) + self.assertEqual(int('1z141z4', 36), 4294967296) + + # tests with base 0 + # this fails on 3.0, but in 2.x the old octal syntax is allowed + self.assertEqual(int(' 0o123 ', 0), 83) + self.assertEqual(int(' 0o123 ', 0), 83) + self.assertEqual(int('000', 0), 0) + self.assertEqual(int('0o123', 0), 83) + self.assertEqual(int('0x123', 0), 291) + self.assertEqual(int('0b100', 0), 4) + self.assertEqual(int(' 0O123 ', 0), 83) + self.assertEqual(int(' 0X123 ', 0), 291) + self.assertEqual(int(' 0B100 ', 0), 4) + + # without base still base 10 + self.assertEqual(int('0123'), 123) + self.assertEqual(int('0123', 10), 123) + + # tests with prefix and base != 0 + self.assertEqual(int('0x123', 16), 291) + self.assertEqual(int('0o123', 8), 83) + self.assertEqual(int('0b100', 2), 4) + self.assertEqual(int('0X123', 16), 291) + self.assertEqual(int('0O123', 8), 83) + self.assertEqual(int('0B100', 2), 4) + + # the code has special checks for the first character after the + # type prefix + self.assertRaises(ValueError, int, '0b2', 2) + self.assertRaises(ValueError, int, '0b02', 2) + self.assertRaises(ValueError, int, '0B2', 2) + self.assertRaises(ValueError, int, '0B02', 2) + self.assertRaises(ValueError, int, '0o8', 8) + self.assertRaises(ValueError, int, '0o08', 8) + self.assertRaises(ValueError, int, '0O8', 8) + self.assertRaises(ValueError, int, '0O08', 8) + self.assertRaises(ValueError, int, '0xg', 16) + self.assertRaises(ValueError, int, '0x0g', 16) + self.assertRaises(ValueError, int, '0Xg', 16) + self.assertRaises(ValueError, int, '0X0g', 16) + + # SF bug 1334662: int(string, base) wrong answers + # Checks for proper evaluation of 2**32 + 1 + self.assertEqual(int('100000000000000000000000000000001', 2), 4294967297) + self.assertEqual(int('102002022201221111212', 3), 4294967297) + self.assertEqual(int('10000000000000001', 4), 4294967297) + self.assertEqual(int('32244002423142', 5), 4294967297) + self.assertEqual(int('1550104015505', 6), 4294967297) + self.assertEqual(int('211301422355', 7), 4294967297) + self.assertEqual(int('40000000001', 8), 4294967297) + self.assertEqual(int('12068657455', 9), 4294967297) + self.assertEqual(int('4294967297', 10), 4294967297) + self.assertEqual(int('1904440555', 11), 4294967297) + self.assertEqual(int('9ba461595', 12), 4294967297) + self.assertEqual(int('535a7988a', 13), 4294967297) + self.assertEqual(int('2ca5b7465', 14), 4294967297) + self.assertEqual(int('1a20dcd82', 15), 4294967297) + self.assertEqual(int('100000001', 16), 4294967297) + self.assertEqual(int('a7ffda92', 17), 4294967297) + self.assertEqual(int('704he7g5', 18), 4294967297) + self.assertEqual(int('4f5aff67', 19), 4294967297) + self.assertEqual(int('3723ai4h', 20), 4294967297) + self.assertEqual(int('281d55i5', 21), 4294967297) + self.assertEqual(int('1fj8b185', 22), 4294967297) + self.assertEqual(int('1606k7id', 23), 4294967297) + self.assertEqual(int('mb994ah', 24), 4294967297) + self.assertEqual(int('hek2mgm', 25), 4294967297) + self.assertEqual(int('dnchbnn', 26), 4294967297) + self.assertEqual(int('b28jpdn', 27), 4294967297) + self.assertEqual(int('8pfgih5', 28), 4294967297) + self.assertEqual(int('76beigh', 29), 4294967297) + self.assertEqual(int('5qmcpqh', 30), 4294967297) + self.assertEqual(int('4q0jto5', 31), 4294967297) + self.assertEqual(int('4000001', 32), 4294967297) + self.assertEqual(int('3aokq95', 33), 4294967297) + self.assertEqual(int('2qhxjlj', 34), 4294967297) + self.assertEqual(int('2br45qc', 35), 4294967297) + self.assertEqual(int('1z141z5', 36), 4294967297) + + def test_intconversion(self): + # Test __int__() + class ClassicMissingMethods: + pass + self.assertRaises(TypeError, int, ClassicMissingMethods()) + + class MissingMethods(object): + pass + self.assertRaises(TypeError, int, MissingMethods()) + + class Foo0: + def __int__(self): + return 42 + + class Foo1(object): + def __int__(self): + return 42 + + class Foo2(int): + def __int__(self): + return 42 + + class Foo3(int): + def __int__(self): + return self + + class Foo4(int): + def __int__(self): + return 42 + + class Foo5(int): + def __int__(self): + return 42. + + self.assertEqual(int(Foo0()), 42) + self.assertEqual(int(Foo1()), 42) + self.assertEqual(int(Foo2()), 42) + self.assertEqual(int(Foo3()), 0) + self.assertEqual(int(Foo4()), 42) + self.assertRaises(TypeError, int, Foo5()) + + class Classic: + pass + for base in (object, Classic): + class IntOverridesTrunc(base): + def __int__(self): + return 42 + def __trunc__(self): + return -12 + self.assertEqual(int(IntOverridesTrunc()), 42) + + class JustTrunc(base): + 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.assertEquals(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() |