bitarray/bitarray/test_bitarray.py at master · ilanschnell/bitarray · GitHub

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# bitarray is published under the PSF license.

# Author: Ilan Schnell

"""

Tests for bitarray

Author: Ilan Schnell

"""

import re

import os

import sys

import platform

import unittest

import shutil

import tempfile

from io import BytesIO, UnsupportedOperation

from random import (choice, choices, getrandbits, randrange, randint,

sample, shuffle)

from string import whitespace

from sysconfig import get_config_var

from collections import deque

# imports needed inside tests

import array

import copy

import itertools

import mmap

import pickle

import shelve

import weakref

pyodide = bool(platform.machine() == 'wasm32')

is_pypy = bool(platform.python_implementation() == 'PyPy')

from bitarray import (bitarray, frozenbitarray, bits2bytes, decodetree,

decodeiterator, get_default_endian,

_bitarray_reconstructor, BufferInfo, __version__)

from bitarray._bitarray import sysinfo # type: ignore

ENDIANS = ('little', 'big')

PTRSIZE = sysinfo("void*") # pointer size in bytes

# avoid importing from bitarray.util

zeros = bitarray

def ones(n, endian=None):

a = bitarray(n, endian)

a.setall(1)

return a

def urandom_2(n, endian="<RAND>"):

if endian == "<RAND>":

endian = choice(ENDIANS)

a = bitarray(os.urandom(bits2bytes(n)), endian)

del a[n:]

return a

class Util:

@staticmethod

def randombitarrays(start=0):

for n in range(start, 10):

yield urandom_2(n)

for _ in range(3):

yield urandom_2(randrange(start, 1000))

def randomlists(self):

for a in self.randombitarrays():

yield a.tolist()

@staticmethod

def opposite_endian(endian):

t = {'little': 'big',

'big': 'little'}

return t[endian]

@staticmethod

def random_slice(n, step=None):

return slice(randint(-n - 2, n + 2),

randint(-n - 2, n + 2),

step or randint(-5, 5) or 1)

def check_obj(self, a):

self.assertIsInstance(a, bitarray)

self.assertEqual(a.nbytes, bits2bytes(len(a)))

self.assertIn(a.padbits, range(8))

self.assertEqual(len(a) + a.padbits, 8 * a.nbytes)

info = a.buffer_info()

if info.imported:

# imported buffer implies that no extra memory is allocated

self.assertEqual(info.alloc, 0)

# an imported buffer will always have a multiple of 8 bits

self.assertEqual(len(a), 8 * a.nbytes)

self.assertEqual(a.padbits, 0)

else:

# the allocated memory is always larger than the buffer size

self.assertTrue(info.alloc >= a.nbytes)

if info.address == 0:

# the buffer being a NULL pointer implies that the buffer size

# and the allocated memory size are 0

self.assertEqual(a.nbytes, 0)

self.assertEqual(info.alloc, 0)

if type(a) is frozenbitarray:

# frozenbitarray have read-only memory

self.assertTrue(a.readonly)

if a.padbits: # ensure padbits are zero

b = bitarray(bytes(a)[-1:], endian=a.endian)[-a.padbits:]

self.assertEqual(len(b), a.padbits)

self.assertEqual(b.count(), 0)

elif not info.imported:

# otherwise, unless the buffer is imported, it is writable

self.assertFalse(a.readonly)

def assertEQUAL(self, a, b):

self.assertEqual(a, b)

self.assertEqual(a.endian, b.endian)

def assertIsType(self, a, b):

self.assertEqual(type(a).__name__, b)

self.assertEqual(repr(type(a)), "<class 'bitarray.%s'>" % b)

@staticmethod

def assertRaisesMessage(excClass, msg, callable, *args, **kwargs):

try:

callable(*args, **kwargs)

raise AssertionError("%s not raised" % excClass.__name__)

except excClass as e:

if msg != str(e):

raise AssertionError("message: %s\n got: %s" % (msg, e))

# -------------------------- Module Functions -----------------------------

class ModuleFunctionsTests(unittest.TestCase):

def test_version_string(self):

# the version string is not a function, but test it here anyway

self.assertIs(type(__version__), str)

def test_get_default_endian(self):

endian = get_default_endian()

self.assertIn(endian, ENDIANS)

self.assertIs(type(endian), str)

a = bitarray()

self.assertEqual(a.endian, endian)

def test_get_default_endian_errors(self):

# takes no arguments

self.assertRaises(TypeError, get_default_endian, 'big')

def test_bits2bytes(self):

for n, res in (0, 0), (1, 1), (7, 1), (8, 1), (9, 2):

self.assertEqual(bits2bytes(n), res)

for n in range(1, 200):

m = bits2bytes(n)

self.assertEqual(m, (n - 1) // 8 + 1)

self.assertIs(type(m), int)

k = (1 << n) + randrange(1000)

self.assertEqual(bits2bytes(k), (k - 1) // 8 + 1)

def test_bits2bytes_errors(self):

for arg in 'foo', [], None, {}, 187.0, -4.0:

self.assertRaises(TypeError, bits2bytes, arg)

self.assertRaises(TypeError, bits2bytes)

self.assertRaises(TypeError, bits2bytes, 1, 2)

self.assertRaises(ValueError, bits2bytes, -1)

self.assertRaises(ValueError, bits2bytes, -924)

class SysinfoTests(unittest.TestCase):

def test_keys(self):

for key in ["void*", "size_t", "bitarrayobject", "decodetreeobject",

"binode", "HAVE_BUILTIN_BSWAP64",

"PY_LITTLE_ENDIAN", "PY_BIG_ENDIAN",

"Py_GIL_DISABLED", "Py_DEBUG", "DEBUG"]:

res = sysinfo(key)

self.assertIs(type(res), int)

def test_errors(self):

self.assertRaises(TypeError, sysinfo)

self.assertRaises(TypeError, sysinfo, b"void*")

self.assertRaises(KeyError, sysinfo, "foo")

@unittest.skipIf(sys.version_info[:2] < (3, 14),

"free-threading not supported")

def test_gil_disabled(self):

gil_disabled = sysinfo("Py_GIL_DISABLED")

self.assertEqual(gil_disabled, "free-threading" in sys.version)

self.assertEqual(gil_disabled,

get_config_var("Py_GIL_DISABLED") in (1, "1"))

# see if GIL is actually disabled in free-threading build

if gil_disabled:

self.assertFalse(sys._is_gil_enabled())

def test_py_debug(self):

self.assertEqual(sysinfo("Py_DEBUG"),

get_config_var("Py_DEBUG") in (1, "1"))

def test_pointer_size(self):

self.assertEqual(sysinfo("void*"), PTRSIZE)

self.assertEqual(sysinfo("size_t"), PTRSIZE)

self.assertEqual(sys.maxsize + 1, 1 << (8 * PTRSIZE - 1))

self.assertEqual(sys.maxsize.bit_length(), 8 * PTRSIZE - 1)

if not is_pypy: # PyPy doesn't have tuple.__itemsize__

self.assertEqual(PTRSIZE, tuple.__itemsize__)

def test_byteorder(self):

self.assertEqual(sys.byteorder == "little",

sysinfo("PY_LITTLE_ENDIAN"))

self.assertEqual(sys.byteorder == "big",

sysinfo("PY_BIG_ENDIAN"))

# ---------------------------------------------------------------------------

class CreateObjectTests(unittest.TestCase, Util):

def test_noInitializer(self):

a = bitarray()

self.assertEqual(len(a), 0)

self.assertEqual(a.tolist(), [])

self.assertIs(type(a), bitarray)

self.check_obj(a)

def test_endian(self):

a = bitarray(b"ABC", endian='little')

self.assertEqual(a.endian, 'little')

self.assertIs(type(a.endian), str)

self.check_obj(a)

b = bitarray(b"ABC", endian='big')

self.assertEqual(b.endian, 'big')

self.assertIs(type(a.endian), str)

self.check_obj(b)

self.assertNotEqual(a, b)

self.assertEqual(a.tobytes(), b.tobytes())

def test_endian_wrong(self):

self.assertRaises(TypeError, bitarray, endian=0)

self.assertRaises(ValueError, bitarray, endian='')

self.assertRaisesMessage(

ValueError,

"bit-endianness must be either 'little' or 'big', not 'foo'",

bitarray, endian='foo')

self.assertRaisesMessage(TypeError,

"'ellipsis' object is not iterable",

bitarray, Ellipsis)

def test_buffer_endian(self):

for endian in ENDIANS:

a = bitarray(buffer=b'', endian=endian)

self.assertEQUAL(a, bitarray(0, endian))

a = bitarray(buffer=b'A')

self.assertEqual(a.endian, get_default_endian())

self.assertEqual(len(a), 8)

def test_buffer_readonly(self):

a = bitarray(buffer=b'\xf0', endian='little')

self.assertTrue(a.readonly)

self.assertRaises(TypeError, a.clear)

self.assertRaises(TypeError, a.__setitem__, 3, 1)

self.assertEQUAL(a, bitarray('00001111', 'little'))

self.check_obj(a)

@unittest.skipIf(is_pypy, "skip test on PyPy")

def test_buffer_writable(self):

a = bitarray(buffer=bytearray([65]))

self.assertFalse(a.readonly)

a[6] = 1

def test_buffer_args(self):

# buffer requires no initial argument

self.assertRaises(TypeError, bitarray, 5, buffer=b'DATA\0')

# positional arguments

a = bitarray(None, 'big', bytearray([15]))

self.assertEQUAL(a, bitarray('00001111', 'big'))

a = bitarray(None, 'little', None)

self.assertEQUAL(a, bitarray(0, 'little'))

def test_none(self):

for a in [bitarray(None),

bitarray(None, buffer=None),

bitarray(None, buffer=Ellipsis),

bitarray(None, None, None),

bitarray(None, None, Ellipsis)]:

self.assertEqual(len(a), 0)

def test_int(self):

for n in range(50):

a = bitarray(n)

self.assertEqual(len(a), n)

self.assertFalse(a.any())

self.assertEqual(a.to01(), n * '0')

self.check_obj(a)

# uninitialized buffer

a = bitarray(n, buffer=Ellipsis)

self.assertEqual(len(a), n)

self.check_obj(a)

self.assertRaises(ValueError, bitarray, -1)

self.assertRaises(ValueError, bitarray, -924)

def test_list(self):

a = bitarray([0, 1, False, True])

self.assertEqual(a, bitarray('0101'))

self.check_obj(a)

self.assertRaises(ValueError, bitarray, [0, 1, 2])

self.assertRaises(TypeError, bitarray, [0, 1, None])

for n in range(50):

lst = [bool(getrandbits(1)) for d in range(n)]

a = bitarray(lst)

self.assertEqual(a.tolist(), lst)

self.check_obj(a)

def test_sequence(self):

lst = [0, 1, 1, 1, 0]

for x in lst, tuple(lst), array.array('i', lst):

self.assertEqual(len(x), 5) # sequences have len, iterables not

a = bitarray(x)

self.assertEqual(a, bitarray('01110'))

self.check_obj(a)

def test_iter1(self):

for n in range(50):

lst = [bool(getrandbits(1)) for d in range(n)]

a = bitarray(iter(lst))

self.assertEqual(a.tolist(), lst)

self.check_obj(a)

def test_iter2(self):

for lst in self.randomlists():

def foo():

for x in lst:

yield x

a = bitarray(foo())

self.assertEqual(a, bitarray(lst))

self.check_obj(a)

def test_iter3(self):

a = bitarray(itertools.repeat(False, 10))

self.assertEqual(a, zeros(10))

a = bitarray(itertools.repeat(1, 10))

self.assertEqual(a, bitarray(10 * '1'))

def test_range(self):

self.assertEqual(bitarray(range(2)), bitarray('01'))

self.assertRaises(ValueError, bitarray, range(0, 3))

def test_string01(self):

for s in '0010111', '0010 111', '0010_111':

a = bitarray(s)

self.assertEqual(a.tolist(), [0, 0, 1, 0, 1, 1, 1])

self.check_obj(a)

for lst in self.randomlists():

s = ''.join([['0', '1'][x] for x in lst])

a = bitarray(s)

self.assertEqual(a.tolist(), lst)

self.check_obj(a)

self.assertRaises(ValueError, bitarray, '01021') # UCS1

self.assertRaises(ValueError, bitarray, '1\u26050') # UCS2

self.assertRaises(ValueError, bitarray, '0\U00010348') # UCS4

def test_string01_whitespace(self):

a = bitarray(whitespace)

self.assertEqual(a, bitarray())

for c in whitespace:

a = bitarray(c + '1101110001')

self.assertEqual(a, bitarray('1101110001'))

a = bitarray(' 0\n1\r0\t1\v0 ')

self.assertEqual(a, bitarray('01010'))

def test_bytes_bytearray(self):

for x in b'\x80', bytearray(b'\x80'):

a = bitarray(x, 'little')

self.assertEqual(len(a), 8 * len(x))

self.assertEqual(a.tobytes(), x)

self.assertEqual(a.to01(), '00000001')

self.check_obj(a)

for n in range(100):

x = os.urandom(n)

a = bitarray(x)

self.assertEqual(len(a), 8 * n)

self.assertEqual(memoryview(a), x)

def test_byte(self):

for byte, endian, res in [

(b'\x01', 'little', '10000000'),

(b'\x80', 'little', '00000001'),

(b'\x80', 'big', '10000000'),

(b'\x01', 'big', '00000001')]:

a = bitarray(byte, endian)

self.assertEqual(a.to01(), res)

def test_bitarray_simple(self):

for n in range(10):

a = bitarray(n)

b = bitarray(a, endian=None)

self.assertIsNot(a, b)

self.assertEQUAL(a, b)

def test_bitarray_endian(self):

# Test creating a new bitarray with different endianness from an

# existing bitarray.

for endian in ENDIANS:

a = bitarray(endian=endian)

b = bitarray(a)

self.assertIsNot(a, b)

self.assertEQUAL(a, b)

endian2 = self.opposite_endian(endian)

b = bitarray(a, endian2)

self.assertEqual(b.endian, endian2)

self.assertEqual(a, b)

for a in self.randombitarrays():

endian2 = self.opposite_endian(a.endian)

b = bitarray(a, endian2)

self.assertEqual(a, b)

self.assertEqual(b.endian, endian2)

self.assertNotEqual(a.endian, b.endian)

def test_bitarray_endianness(self):

a = bitarray('11100001', endian='little')

b = bitarray(a, endian='big')

self.assertEqual(a, b)

self.assertNotEqual(a.tobytes(), b.tobytes())

b.bytereverse()

self.assertNotEqual(a, b)

self.assertEqual(a.tobytes(), b.tobytes())

c = bitarray('11100001', endian='big')

self.assertEqual(a, c)

def test_frozenbitarray(self):

a = bitarray(frozenbitarray())

self.assertEQUAL(a, bitarray())

self.assertIs(type(a), bitarray)

for endian in ENDIANS:

a = bitarray(frozenbitarray('011', endian=endian))

self.assertEQUAL(a, bitarray('011', endian))

self.assertIs(type(a), bitarray)

def test_create_empty(self):

for x in (None, 0, '', list(), tuple(), set(), dict(), bytes(),

bytearray(), bitarray(), frozenbitarray()):

a = bitarray(x)

self.assertEqual(len(a), 0)

self.assertEQUAL(a, bitarray())

def test_wrong_args(self):

# wrong types

for x in False, True, Ellipsis, slice(0), 0.0, 0 + 0j:

self.assertRaises(TypeError, bitarray, x)

# wrong values

for x in -1, 'A', '\0', '010\0 11':

self.assertRaises(ValueError, bitarray, x)

# test second (endian) argument

self.assertRaises(TypeError, bitarray, 0, 0)

self.assertRaises(ValueError, bitarray, 0, 'foo')

# too many args

self.assertRaises(TypeError, bitarray, 0, 'big', 0)

@unittest.skipIf(is_pypy, "skip test on PyPy")

def test_weakref(self):

a = bitarray('0100')

b = weakref.proxy(a)

self.assertEqual(b.to01(), a.to01())

a = None

self.assertRaises(ReferenceError, len, b)

# ---------------------------------------------------------------------------

class ToObjectsTests(unittest.TestCase, Util):

def test_numeric(self):

a = bitarray()

self.assertRaises(Exception, int, a)

self.assertRaises(Exception, float, a)

self.assertRaises(Exception, complex, a)

def test_list(self):

for a in self.randombitarrays():

self.assertEqual(list(a), a.tolist())

def test_tuple(self):

for a in self.randombitarrays():

self.assertEqual(tuple(a), tuple(a.tolist()))

def test_bytes_bytearray(self):

for n in range(20):

a = urandom_2(8 * n)

self.assertEqual(a.padbits, 0)

self.assertEqual(bytes(a), a.tobytes())

self.assertEqual(bytearray(a), a.tobytes())

def test_bytes_bytearray_pad(self):

for endian, res in ("little", b"\x01"), ("big", b"\x80"):

a = bitarray("1", endian)

self.assertEqual(a.tobytes(), res)

a = bitarray("1", endian)

self.assertEqual(bytes(a), res)

def test_set(self):

for a in self.randombitarrays():

self.assertEqual(set(a), set(a.tolist()))

# -------------------------- (Number) index tests ---------------------------

class GetItemTests(unittest.TestCase, Util):

def test_explicit(self):

a = bitarray()

self.assertRaises(IndexError, a.__getitem__, 0)

a.append(True)

self.assertEqual(a[0], 1)

self.assertEqual(a[-1], 1)

self.assertRaises(IndexError, a.__getitem__, 1)

self.assertRaises(IndexError, a.__getitem__, -2)

a.append(False)

self.assertEqual(a[1], 0)

self.assertEqual(a[-1], 0)

self.assertRaises(IndexError, a.__getitem__, 2)

self.assertRaises(IndexError, a.__getitem__, -3)

self.assertRaises(TypeError, a.__getitem__, 1.5)

self.assertRaises(TypeError, a.__getitem__, None)

self.assertRaises(TypeError, a.__getitem__, 'A')

def test_basic(self):

a = bitarray('1100010')

for i, v in enumerate(a):

self.assertEqual(a[i], v)

self.assertIs(type(a[i]), int)

self.assertEqual(a[-7 + i], v)

self.assertRaises(IndexError, a.__getitem__, 7)

self.assertRaises(IndexError, a.__getitem__, -8)

def test_range(self):

for a in self.randombitarrays():

aa = a.tolist()

for i in range(len(a)):

self.assertEqual(a[i], aa[i])

class SetItemTests(unittest.TestCase, Util):

def test_explicit(self):

a = bitarray('0')

a[0] = 1

self.assertEqual(a, bitarray('1'))

a = bitarray(2)

a[0] = 0

a[1] = 1

self.assertEqual(a, bitarray('01'))

a[-1] = 0

a[-2] = 1

self.assertEqual(a, bitarray('10'))

self.assertRaises(ValueError, a.__setitem__, 0, -1)

self.assertRaises(TypeError, a.__setitem__, 1, None)

self.assertRaises(IndexError, a.__setitem__, 2, True)

self.assertRaises(IndexError, a.__setitem__, -3, False)

self.assertRaises(TypeError, a.__setitem__, 1.5, 1) # see issue 114

self.assertRaises(TypeError, a.__setitem__, None, 0)

self.assertRaises(TypeError, a.__setitem__, 'a', True)

self.assertEqual(a, bitarray('10'))

def test_random(self):

for a in self.randombitarrays(start=1):

i = randrange(len(a))

aa = a.tolist()

v = getrandbits(1)

a[i] = v

aa[i] = v

self.assertEqual(a.tolist(), aa)

self.check_obj(a)

@unittest.skipIf(is_pypy, "skip test on PyPy")

def test_imported(self):

a = bytearray([5, 1, 2, 3])

b = bitarray(endian="little", buffer=a)

self.assertFalse(b.readonly)

# operate on imported (writable) buffer

b[7] = 1

self.assertEqual(a, bytearray([0x85, 1, 2, 3]))

b[-2] = 1

self.assertEqual(a, bytearray([0x85, 1, 2, 0x43]))

class DelItemTests(unittest.TestCase, Util):

def test_simple(self):

a = bitarray('100110')

del a[1]

self.assertEqual(len(a), 5)

del a[3], a[-2]

self.assertEqual(a, bitarray('100'))

self.assertRaises(IndexError, a.__delitem__, 3)

self.assertRaises(IndexError, a.__delitem__, -4)

def test_random(self):

for a in self.randombitarrays(start=1):

n = len(a)

b = a.copy()

i = randrange(n)

del b[i]

self.assertEQUAL(b, a[:i] + a[i + 1:])

self.assertEqual(len(b), n - 1)

self.check_obj(b)

@unittest.skipIf(is_pypy, "skip test on PyPy")

def test_imported(self):

a = bytearray([5, 11, 7])

b = bitarray(buffer=a)

self.assertFalse(b.readonly)

self.assertRaises(BufferError, b.__delitem__, 13)

# ------------------------ Slice subscript tests ----------------------------

class GetSliceTests(unittest.TestCase, Util):

def test_slice(self):

B = bitarray

a = B('01001111 00001')

self.assertEQUAL(a[:], a)

self.assertIsNot(a[:], a)

self.assertEQUAL(a[13:2:-3], B('1010'))

self.assertEQUAL(a[2:-1:4], B('010'))

self.assertEQUAL(a[::2], B('0011001'))

self.assertEQUAL(a[8:], B('00001'))

self.assertEQUAL(a[7:], B('100001'))

self.assertEQUAL(a[:8], B('01001111'))

self.assertEQUAL(a[::-1], B('10000111 10010'))

self.assertEQUAL(a[:8:-1], B('1000'))

self.assertRaises(ValueError, a.__getitem__, slice(None, None, 0))

def test_frozenbitarray(self):

a = frozenbitarray('01001111 00001')

b = a[13:2:-3]

self.assertIs(type(b), frozenbitarray)

self.assertEqual(b, bitarray('1010'))

self.assertTrue(b.readonly)

self.check_obj(b)

def test_reverse(self):

for _ in range(20):

n = randrange(200)

a = urandom_2(n)

b = a.copy()

b.reverse()

self.assertEQUAL(a[::-1], b)

def test_random_step1(self):

for n in range(200):

a = urandom_2(n)

i = randint(0, n)

j = randint(0, n)

b = a[i:j]

self.assertEqual(b.to01(), a.to01()[i:j])

self.assertEqual(len(b), max(j - i, 0))

self.assertEqual(b.endian, a.endian)

def test_random(self):

for n in range(200):

a = urandom_2(n)

s = self.random_slice(n)

b = a[s]

self.assertEqual(len(b), len(range(n)[s])) # slicelength

self.assertEqual(list(b), a.tolist()[s])

self.assertEqual(b.endian, a.endian)

class SetSliceTests(unittest.TestCase, Util):

def test_simple(self):

for a in self.randombitarrays(start=1):

n = len(a)

b = bitarray(n)

b[0:n] = bitarray(a)

self.assertEqual(a, b)

self.assertIsNot(a, b)

b = bitarray(n)

b[:] = bitarray(a)

self.assertEqual(a, b)

self.assertIsNot(a, b)

b = bitarray(n)

b[::-1] = a

self.assertEqual(b.tolist(), a.tolist()[::-1])

def test_random(self):

for a in self.randombitarrays(start=1):

len_a = len(a)

for _ in range(10):

s = self.random_slice(len_a)

len_b = randrange(10) if s.step == 1 else len(range(len_a)[s])

b = bitarray(len_b)

c = bitarray(a)

c[s] = b

self.check_obj(c)

cc = a.tolist()

cc[s] = b.tolist()

self.assertEqual(c, bitarray(cc))

def test_self_random(self):

for a in self.randombitarrays():

n = len(a)

for step in -1, 1:

s = slice(None, None, step)

# ensure slicelength equals len(a)

self.assertEqual(len(range(n)[s]), n)

aa = a.tolist()

a[s] = a

aa[s] = aa

self.assertEqual(a, bitarray(aa))

def test_special(self):

for n in 0, 1, 10, 87:

a = urandom_2(n)

for m in 0, 1, 10, 99:

x = urandom_2(m)

b = a.copy()

b[n:n] = x # insert at end - extend

self.assertEqual(b, a + x)

self.assertEqual(len(b), len(a) + len(x))

b[0:0] = x # insert at 0 - prepend

self.assertEqual(b, x + a + x)

self.check_obj(b)

self.assertEqual(len(b), len(a) + 2 * len(x))

def test_range(self):

# tests C function insert_n()

for _ in range(100):

n = randrange(200)

a = urandom_2(n)

p = randint(0, n)

m = randint(0, 500)

x = urandom_2(m)

b = a.copy()

b[p:p] = x

self.assertEQUAL(b, a[:p] + x + a[p:])

self.assertEqual(len(b), len(a) + m)

self.check_obj(b)

def test_resize(self):

for _ in range(100):

n = randint(0, 200)

a = urandom_2(n)

p1 = randint(0, n)

p2 = randint(0, n)

m = randint(0, 300)

x = urandom_2(m)

b = a.copy()

b[p1:p2] = x

b_lst = a.tolist()

b_lst[p1:p2] = x.tolist()

self.assertEqual(b.tolist(), b_lst)

if p1 <= p2:

self.assertEQUAL(b, a[:p1] + x + a[p2:])

self.assertEqual(len(b), n + p1 - p2 + len(x))

else:

self.assertEqual(b, a[:p1] + x + a[p1:])

self.assertEqual(len(b), n + len(x))

self.check_obj(b)

def test_self(self):

a = bitarray('1100111')

a[::-1] = a

self.assertEqual(a, bitarray('1110011'))

a[4:] = a

self.assertEqual(a, bitarray('11101110011'))

a[:-5] = a

self.assertEqual(a, bitarray('1110111001110011'))

a = bitarray('01001')

a[:-1] = a

self.assertEqual(a, bitarray('010011'))

a[2::] = a

self.assertEqual(a, bitarray('01010011'))

a[2:-2:1] = a

self.assertEqual(a, bitarray('010101001111'))

a = bitarray('011')

a[2:2] = a

self.assertEqual(a, bitarray('010111'))

a[:] = a

self.assertEqual(a, bitarray('010111'))

def test_self_shared_buffer(self):

# This is a special case. We have two bitarrays which share the

# same buffer, and then do a slice assignment. The bitarray is

# copied onto itself in reverse order. So we need to make a copy

# in setslice_bitarray(). However, since a and b are two distinct

# objects, it is not enough to check for self == other, but rather

# check whether their buffers overlap.

a = bitarray('11100000')

b = bitarray(buffer=a)

b[::-1] = a

self.assertEqual(a, b)

self.assertEqual(a, bitarray('00000111'))

def test_self_shared_buffer_2(self):

# This is an even more special case. We have a bitarrays which

# shares part of anothers bitarray buffer. So in setslice_bitarray(),

# we need to make a copy of other if:

# self->ob_item <= other->ob_item <= self->ob_item + Py_SIZE(self)

# In words: Is the other buffer inside the self buffer (which inclues

# the previous case)

a = bitarray('11111111 11000000 00000000')

b = bitarray(buffer=memoryview(a)[1:2])

self.assertEqual(b, bitarray('11000000'))

a[15:7:-1] = b

self.assertEqual(a, bitarray('11111111 00000011 00000000'))

@unittest.skipIf(is_pypy, "skip test on PyPy")

def test_self_shared_buffer_3(self):

# Requires to check for (in setslice_bitarray()):

# other->ob_item <= self->ob_item <= other->ob_item + Py_SIZE(other)

a = bitarray('11111111 11000000 00000000')

b = bitarray(buffer=memoryview(a)[:2])

c = bitarray(buffer=memoryview(a)[1:])

self.assertEqual(b, bitarray('11111111 11000000'))

self.assertEqual(c, bitarray('11000000 00000000'))

c[::-1] = b

self.assertEqual(c, bitarray('00000011 11111111'))

self.assertEqual(a, bitarray('11111111 00000011 11111111'))

def test_setslice_bitarray(self):

a = ones(12)

a[2:6] = bitarray('0010')

self.assertEqual(a, bitarray('11001011 1111'))

a.setall(0)

a[::2] = bitarray('111001')

self.assertEqual(a, bitarray('10101000 0010'))

a.setall(0)

a[3:] = bitarray('111')

self.assertEqual(a, bitarray('000111'))

a = zeros(12)

a[1:11:2] = bitarray('11101')

self.assertEqual(a, bitarray('01010100 0100'))

a.setall(0)

a[5:2] = bitarray('111') # make sure inserts before 5 (not 2)

self.assertEqual(a, bitarray('00000111 0000000'))

a = zeros(12)

a[:-6:-1] = bitarray('10111')

self.assertEqual(a, bitarray('00000001 1101'))

def test_bitarray_2(self):

a = bitarray('1111')

a[3:3] = bitarray('000') # insert

self.assertEqual(a, bitarray('1110001'))

a[2:5] = bitarray() # remove

self.assertEqual(a, bitarray('1101'))

a = bitarray('1111')

a[1:3] = bitarray('0000')

self.assertEqual(a, bitarray('100001'))

a[:] = bitarray('010') # replace all values

self.assertEqual(a, bitarray('010'))

# assign slice to bitarray with different length

a = bitarray('111111')

a[3:4] = bitarray('00')

self.assertEqual(a, bitarray('1110011'))

a[2:5] = bitarray('0') # remove

self.assertEqual(a, bitarray('11011'))

def test_frozenbitarray(self):

a = bitarray('11111111 1111')

b = frozenbitarray('0000')

a[2:6] = b

self.assertEqual(a, bitarray('11000011 1111'))

self.assertIs(type(b), frozenbitarray)

self.assertEqual(b, bitarray('0000'))

b = frozenbitarray('011100')

a[::2] = b

self.assertEqual(a, bitarray('01101011 0101'))

self.check_obj(a)

self.assertIs(type(b), frozenbitarray)

self.assertEqual(b, bitarray('011100'))

def test_setslice_bitarray_random_same_length(self):

for _ in range(100):

n = randrange(200)

a = urandom_2(n)

lst_a = a.tolist()

b = urandom_2(randint(0, n))

lst_b = b.tolist()

i = randint(0, n - len(b))

j = i + len(b)

self.assertEqual(j - i, len(b))

a[i:j] = b

lst_a[i:j] = lst_b

self.assertEqual(a.tolist(), lst_a)

# a didn't change length

self.assertEqual(len(a), n)

self.check_obj(a)

def test_bitarray_random_step1(self):

for _ in range(50):

n = randrange(300)

a = urandom_2(n)

lst_a = a.tolist()

b = urandom_2(randrange(100))

lst_b = b.tolist()

s = self.random_slice(n, step=1)

a[s] = b

lst_a[s] = lst_b

self.assertEqual(a.tolist(), lst_a)

self.check_obj(a)

def test_bitarray_random(self):

for _ in range(100):

n = randrange(50)

a = urandom_2(n)

lst_a = a.tolist()

b = urandom_2(randrange(50))

lst_b = b.tolist()

s = self.random_slice(n)

try:

a[s] = b

except ValueError:

a = None

try:

lst_a[s] = lst_b

except ValueError:

lst_a = None

if a is None:

self.assertIsNone(lst_a)

else:

self.assertEqual(a.tolist(), lst_a)

self.check_obj(a)

def test_bool_explicit(self):

B = bitarray

a = B('11111111')

a[::2] = False

self.assertEqual(a, B('01010101'))

a[4::] = True # ^^^^

self.assertEqual(a, B('01011111'))

a[-2:] = False # ^^

self.assertEqual(a, B('01011100'))

a[:2:] = True # ^^

self.assertEqual(a, B('11011100'))

a[:] = True # ^^^^^^^^

self.assertEqual(a, B('11111111'))

a[2:5] = False # ^^^

self.assertEqual(a, B('11000111'))

a[1::3] = False # ^ ^ ^

self.assertEqual(a, B('10000110'))

a[1:6:2] = True # ^ ^ ^

self.assertEqual(a, B('11010110'))

a[3:3] = False # zero slicelength

self.assertEqual(a, B('11010110'))

a[:] = False # ^^^^^^^^

self.assertEqual(a, B('00000000'))

a[-2:2:-1] = 1 # ^^^^

self.assertEqual(a, B('00011110'))

def test_bool_step1(self):

for _ in range(100):

n = randrange(1000)

start = randint(0, n)

stop = randint(start, n)

a = bitarray(n)

a[start:stop] = 1

self.assertEqual(a.count(1), stop - start)

b = bitarray(n)

View remainder of file in raw view

bitarray/bitarray/test_bitarray.py at master · ilanschnell/bitarray · GitHub

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