Gecko [ beriskala.com ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
audiodata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
capath	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
cjkencodings	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
data	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
decimaltestdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
encoded_modules	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
imghdrdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
namespace_pkgs	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
sndhdrdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
subprocessdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
support	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_email	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_importlib	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_json	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
tracedmodules	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
xmltestdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
185test.db	16 KB	-rw-r--r--	2017-09-19 12:02
Sine-1000Hz-300ms.aif	60.25 KB	-rw-r--r--	2017-09-19 12:02
__init__.py	47 B	-rw-r--r--	2024-04-17 20:28
__main__.py	474 B	-rw-r--r--	2024-04-17 20:28
audiotests.py	9.34 KB	-rw-r--r--	2024-04-17 20:28
autotest.py	211 B	-rw-r--r--	2024-04-17 20:28
bad_coding.py	24 B	-rw-r--r--	2024-04-17 20:28
bad_coding2.py	30 B	-rw-r--r--	2024-04-17 20:28
badcert.pem	1.88 KB	-rw-r--r--	2017-09-19 12:02
badkey.pem	2.11 KB	-rw-r--r--	2017-09-19 12:02
badsyntax_3131.py	32 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future3.py	172 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future4.py	153 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future5.py	184 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future6.py	161 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future7.py	196 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future8.py	122 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future9.py	142 B	-rw-r--r--	2024-04-17 20:28
badsyntax_pep3120.py	14 B	-rw-r--r--	2024-04-17 20:28
buffer_tests.py	10.79 KB	-rw-r--r--	2024-04-17 20:28
cfgparser.1	21 B	-rw-r--r--	2017-09-19 12:02
cfgparser.2	19.02 KB	-rw-r--r--	2017-09-19 12:02
cfgparser.3	1.55 KB	-rw-r--r--	2017-09-19 12:02
check_soundcard.vbs	411 B	-rw-r--r--	2017-09-19 12:02
cmath_testcases.txt	133.86 KB	-rw-r--r--	2017-09-19 12:02
coding20731.py	18 B	-rw-r--r--	2024-04-17 20:28
curses_tests.py	1.22 KB	-rwxr-xr-x	2024-04-17 20:28
datetimetester.py	146.82 KB	-rw-r--r--	2024-04-17 20:28
dh1024.pem	300 B	-rw-r--r--	2017-09-19 12:02
dis_module.py	76 B	-rw-r--r--	2024-04-17 20:28
doctest_aliases.py	240 B	-rw-r--r--	2024-04-17 20:28
double_const.py	1.18 KB	-rw-r--r--	2024-04-17 20:28
empty.vbs	70 B	-rw-r--r--	2017-09-19 12:02
exception_hierarchy.txt	1.69 KB	-rw-r--r--	2017-09-19 12:02
floating_points.txt	15.92 KB	-rw-r--r--	2017-09-19 12:02
fork_wait.py	2.1 KB	-rw-r--r--	2024-04-17 20:28
formatfloat_testcases.txt	7.45 KB	-rw-r--r--	2017-09-19 12:02
future_test1.py	229 B	-rw-r--r--	2024-04-17 20:28
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gdb_sample.py	153 B	-rw-r--r--	2024-04-17 20:28
ieee754.txt	3.21 KB	-rw-r--r--	2017-09-19 12:02
inspect_fodder.py	854 B	-rw-r--r--	2024-04-17 20:28
inspect_fodder2.py	1.39 KB	-rw-r--r--	2024-04-17 20:28
keycert.passwd.pem	1.79 KB	-rw-r--r--	2017-09-19 12:02
keycert.pem	1.74 KB	-rw-r--r--	2017-09-19 12:02
keycert2.pem	1.75 KB	-rw-r--r--	2017-09-19 12:02
list_tests.py	17.26 KB	-rw-r--r--	2024-04-17 20:28
lock_tests.py	25.47 KB	-rw-r--r--	2024-04-17 20:28
mailcap.txt	1.24 KB	-rw-r--r--	2017-09-19 12:02
make_ssl_certs.py	1.84 KB	-rw-r--r--	2024-04-17 20:28
mapping_tests.py	21.5 KB	-rw-r--r--	2024-04-17 20:28
math_testcases.txt	23.19 KB	-rw-r--r--	2017-09-19 12:02
memory_watchdog.py	859 B	-rw-r--r--	2024-04-17 20:28
mime.types	47.37 KB	-rw-r--r--	2017-09-19 12:02
mock_socket.py	3.32 KB	-rw-r--r--	2024-04-17 20:28
mp_fork_bomb.py	323 B	-rw-r--r--	2024-04-17 20:28
multibytecodec_support.py	14.25 KB	-rw-r--r--	2024-04-17 20:28
nokia.pem	1.88 KB	-rw-r--r--	2017-09-19 12:02
nullbytecert.pem	5.31 KB	-rw-r--r--	2017-09-19 12:02
nullcert.pem	0 B	-rw-r--r--	2017-09-19 12:02
outstanding_bugs.py	370 B	-rw-r--r--	2024-04-17 20:28
pickletester.py	60.31 KB	-rw-r--r--	2024-04-17 20:28
profilee.py	2.97 KB	-rw-r--r--	2024-04-17 20:28
pstats.pck	65.05 KB	-rw-r--r--	2017-09-19 12:02
pyclbr_input.py	648 B	-rw-r--r--	2024-04-17 20:28
pydoc_mod.py	461 B	-rw-r--r--	2024-04-17 20:28
pydocfodder.py	6.18 KB	-rw-r--r--	2024-04-17 20:28
pystone.py	7.22 KB	-rwxr-xr-x	2024-04-17 20:28
randv2_32.pck	7.34 KB	-rw-r--r--	2017-09-19 12:02
randv2_64.pck	7.19 KB	-rw-r--r--	2017-09-19 12:02
randv3.pck	7.82 KB	-rw-r--r--	2017-09-19 12:02
re_tests.py	31.06 KB	-rwxr-xr-x	2024-04-17 20:28
regrtest.py	63.54 KB	-rwxr-xr-x	2024-04-17 20:28
relimport.py	27 B	-rw-r--r--	2024-04-17 20:28
reperf.py	538 B	-rw-r--r--	2024-04-17 20:28
sample_doctest.py	1.02 KB	-rw-r--r--	2024-04-17 20:28
sample_doctest_no_docstrings.py	227 B	-rw-r--r--	2024-04-17 20:28
sample_doctest_no_doctests.py	269 B	-rw-r--r--	2024-04-17 20:28
script_helper.py	5.22 KB	-rw-r--r--	2024-04-17 20:28
selfsigned_pythontestdotnet.pem	956 B	-rw-r--r--	2017-09-19 12:02
seq_tests.py	13.49 KB	-rw-r--r--	2024-04-17 20:28
sgml_input.html	8.1 KB	-rw-r--r--	2017-09-19 12:02
sha256.pem	8.15 KB	-rw-r--r--	2017-09-19 12:02
sortperf.py	4.69 KB	-rw-r--r--	2024-04-17 20:28
ssl_cert.pem	867 B	-rw-r--r--	2017-09-19 12:02
ssl_key.passwd.pem	963 B	-rw-r--r--	2017-09-19 12:02
ssl_key.pem	916 B	-rw-r--r--	2017-09-19 12:02
ssl_servers.py	6.82 KB	-rw-r--r--	2024-04-17 20:28
string_tests.py	62.74 KB	-rw-r--r--	2024-04-17 20:28
test___all__.py	3.86 KB	-rw-r--r--	2024-04-17 20:28
test___future__.py	2.44 KB	-rw-r--r--	2024-04-17 20:28
test__locale.py	6.89 KB	-rw-r--r--	2024-04-17 20:28
test__osx_support.py	11.41 KB	-rw-r--r--	2024-04-17 20:28
test_abc.py	12.76 KB	-rw-r--r--	2024-04-17 20:28
test_abstract_numbers.py	1.49 KB	-rw-r--r--	2024-04-17 20:28
test_aifc.py	14.48 KB	-rw-r--r--	2024-04-17 20:28
test_argparse.py	158.6 KB	-rw-r--r--	2024-04-17 20:28
test_array.py	43.88 KB	-rw-r--r--	2024-04-17 20:28
test_ast.py	43.49 KB	-rw-r--r--	2024-04-17 20:28
test_asynchat.py	9.08 KB	-rw-r--r--	2024-04-17 20:28
test_asyncore.py	26.05 KB	-rw-r--r--	2024-04-17 20:28
test_atexit.py	3.53 KB	-rw-r--r--	2024-04-17 20:28
test_audioop.py	17.39 KB	-rw-r--r--	2024-04-17 20:28
test_augassign.py	7.44 KB	-rw-r--r--	2024-04-17 20:28
test_base64.py	14.34 KB	-rw-r--r--	2024-04-17 20:28
test_bigaddrspace.py	2.92 KB	-rw-r--r--	2024-04-17 20:28
test_bigmem.py	44.18 KB	-rw-r--r--	2024-04-17 20:28
test_binascii.py	9.94 KB	-rw-r--r--	2024-04-17 20:28
test_binhex.py	1.47 KB	-rw-r--r--	2024-04-17 20:28
test_binop.py	12.36 KB	-rw-r--r--	2024-04-17 20:28
test_bisect.py	13.65 KB	-rw-r--r--	2024-04-17 20:28
test_bool.py	11.81 KB	-rw-r--r--	2024-04-17 20:28
test_buffer.py	155.09 KB	-rw-r--r--	2024-04-17 20:28
test_bufio.py	2.54 KB	-rw-r--r--	2024-04-17 20:28
test_builtin.py	54.84 KB	-rw-r--r--	2024-04-17 20:28
test_bytes.py	52.86 KB	-rw-r--r--	2024-04-17 20:28
test_bz2.py	30.8 KB	-rw-r--r--	2024-04-17 20:28
test_calendar.py	38.7 KB	-rw-r--r--	2024-04-17 20:28
test_call.py	3.08 KB	-rw-r--r--	2024-04-17 20:28
test_capi.py	13.81 KB	-rw-r--r--	2024-04-17 20:28
test_cgi.py	17.34 KB	-rw-r--r--	2024-04-17 20:28
test_cgitb.py	2.49 KB	-rw-r--r--	2024-04-17 20:28
test_charmapcodec.py	1.75 KB	-rw-r--r--	2024-04-17 20:28
test_class.py	13.79 KB	-rw-r--r--	2024-04-17 20:28
test_cmath.py	20.38 KB	-rw-r--r--	2024-04-17 20:28
test_cmd.py	6.08 KB	-rw-r--r--	2024-04-17 20:28
test_cmd_line.py	15.35 KB	-rw-r--r--	2024-04-17 20:28
test_cmd_line_script.py	16.95 KB	-rw-r--r--	2024-04-17 20:28
test_code.py	3.54 KB	-rw-r--r--	2024-04-17 20:28
test_code_module.py	2.42 KB	-rw-r--r--	2024-04-17 20:28
test_codeccallbacks.py	33.17 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_cn.py	3.38 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_hk.py	775 B	-rw-r--r--	2024-04-17 20:28
test_codecencodings_iso2022.py	1.43 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_jp.py	4.86 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_kr.py	3.03 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_tw.py	755 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_cn.py	930 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_hk.py	505 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_jp.py	1.88 KB	-rw-r--r--	2024-04-17 20:28
test_codecmaps_kr.py	1.34 KB	-rw-r--r--	2024-04-17 20:28
test_codecmaps_tw.py	880 B	-rw-r--r--	2024-04-17 20:28
test_codecs.py	96.02 KB	-rw-r--r--	2024-04-17 20:28
test_codeop.py	7.45 KB	-rw-r--r--	2024-04-17 20:28
test_coding.py	2.51 KB	-rw-r--r--	2024-04-17 20:28
test_collections.py	54.31 KB	-rw-r--r--	2024-04-17 20:28
test_colorsys.py	2.77 KB	-rw-r--r--	2024-04-17 20:28
test_compare.py	1.63 KB	-rw-r--r--	2024-04-17 20:28
test_compile.py	18.62 KB	-rw-r--r--	2024-04-17 20:28
test_compileall.py	15.73 KB	-rw-r--r--	2024-04-17 20:28
test_complex.py	27.09 KB	-rw-r--r--	2024-04-17 20:28
test_concurrent_futures.py	22.57 KB	-rw-r--r--	2024-04-17 20:28
test_configparser.py	69.26 KB	-rw-r--r--	2024-04-17 20:28
test_contains.py	2.58 KB	-rw-r--r--	2024-04-17 20:28
test_contextlib.py	21.39 KB	-rw-r--r--	2024-04-17 20:28
test_copy.py	21.9 KB	-rw-r--r--	2024-04-17 20:28
test_copyreg.py	4.12 KB	-rw-r--r--	2024-04-17 20:28
test_cprofile.py	5.32 KB	-rw-r--r--	2024-04-17 20:28
test_crashers.py	1.18 KB	-rw-r--r--	2024-04-17 20:28
test_crypt.py	1.24 KB	-rw-r--r--	2024-04-17 20:28
test_csv.py	40.9 KB	-rw-r--r--	2024-04-17 20:28
test_ctypes.py	400 B	-rw-r--r--	2024-04-17 20:28
test_curses.py	10.7 KB	-rw-r--r--	2024-04-17 20:28
test_datetime.py	1.81 KB	-rw-r--r--	2024-04-17 20:28
test_dbm.py	5.52 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_dumb.py	5.49 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_gnu.py	2.85 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_ndbm.py	1.13 KB	-rw-r--r--	2024-04-17 20:28
test_decimal.py	197.66 KB	-rw-r--r--	2024-04-17 20:28
test_decorators.py	9.6 KB	-rw-r--r--	2024-04-17 20:28
test_defaultdict.py	5.94 KB	-rw-r--r--	2024-04-17 20:28
test_deque.py	25 KB	-rw-r--r--	2024-04-17 20:28
test_descr.py	156.64 KB	-rw-r--r--	2024-04-17 20:28
test_descrtut.py	11.5 KB	-rw-r--r--	2024-04-17 20:28
test_devpoll.py	3.49 KB	-rw-r--r--	2024-04-17 20:28
test_dict.py	31.11 KB	-rw-r--r--	2024-04-17 20:28
test_dictcomps.py	3.69 KB	-rw-r--r--	2024-04-17 20:28
test_dictviews.py	8.51 KB	-rw-r--r--	2024-04-17 20:28
test_difflib.py	10.78 KB	-rw-r--r--	2024-04-17 20:28
test_difflib_expect.html	100.86 KB	-rw-r--r--	2017-09-19 12:02
test_dis.py	12.33 KB	-rw-r--r--	2024-04-17 20:28
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test_doctest.py	81.78 KB	-rw-r--r--	2024-04-17 20:28
test_doctest.txt	300 B	-rw-r--r--	2017-09-19 12:02
test_doctest2.py	2.3 KB	-rw-r--r--	2024-04-17 20:28
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test_eof.py	855 B	-rw-r--r--	2024-04-17 20:28
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test_fnmatch.py	2.84 KB	-rw-r--r--	2024-04-17 20:28
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test_future4.py	105 B	-rw-r--r--	2024-04-17 20:28
test_future5.py	510 B	-rw-r--r--	2024-04-17 20:28
test_gc.py	29 KB	-rw-r--r--	2024-04-17 20:28
test_gdb.py	35.86 KB	-rw-r--r--	2024-04-17 20:28
test_generators.py	48.5 KB	-rw-r--r--	2024-04-17 20:28
test_genericpath.py	13.3 KB	-rw-r--r--	2024-04-17 20:28
test_genexps.py	7.12 KB	-rw-r--r--	2024-04-17 20:28
test_getargs2.py	23.74 KB	-rw-r--r--	2024-04-17 20:28
test_getopt.py	6.8 KB	-rw-r--r--	2024-04-17 20:28
test_getpass.py	5.95 KB	-rw-r--r--	2024-04-17 20:28
test_gettext.py	22.11 KB	-rw-r--r--	2024-04-17 20:28
test_glob.py	6.69 KB	-rw-r--r--	2024-04-17 20:28
test_global.py	1.25 KB	-rw-r--r--	2024-04-17 20:28
test_grammar.py	31.96 KB	-rw-r--r--	2024-04-17 20:28
test_grp.py	3.18 KB	-rw-r--r--	2024-04-17 20:28
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test_heapq.py	14.14 KB	-rw-r--r--	2024-04-17 20:28
test_hmac.py	17.23 KB	-rw-r--r--	2024-04-17 20:28
test_html.py	579 B	-rw-r--r--	2024-04-17 20:28
test_htmlparser.py	30.74 KB	-rw-r--r--	2024-04-17 20:28
test_http_cookiejar.py	70 KB	-rw-r--r--	2024-04-17 20:28
test_http_cookies.py	9.98 KB	-rw-r--r--	2024-04-17 20:28
test_httplib.py	37.59 KB	-rw-r--r--	2024-04-17 20:28
test_httpservers.py	26.35 KB	-rw-r--r--	2024-04-17 20:28
test_idle.py	1.3 KB	-rw-r--r--	2024-04-17 20:28
test_imaplib.py	15.67 KB	-rw-r--r--	2024-04-17 20:28
test_imghdr.py	4.31 KB	-rw-r--r--	2024-04-17 20:28
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Rename

"""Unit tests for the memoryview

Some tests are in test_bytes. Many tests that require _testbuffer.ndarray
   are in test_buffer.
"""

import unittest
import test.support
import sys
import gc
import weakref
import array
import io

class AbstractMemoryTests:
    source_bytes = b"abcdef"

@property
    def _source(self):
        return self.source_bytes

@property
    def _types(self):
        return filter(None, [self.ro_type, self.rw_type])

def check_getitem_with_type(self, tp):
        b = tp(self._source)
        oldrefcount = sys.getrefcount(b)
        m = self._view(b)
        self.assertEqual(m[0], ord(b"a"))
        self.assertIsInstance(m[0], int)
        self.assertEqual(m[5], ord(b"f"))
        self.assertEqual(m[-1], ord(b"f"))
        self.assertEqual(m[-6], ord(b"a"))
        # Bounds checking
        self.assertRaises(IndexError, lambda: m[6])
        self.assertRaises(IndexError, lambda: m[-7])
        self.assertRaises(IndexError, lambda: m[sys.maxsize])
        self.assertRaises(IndexError, lambda: m[-sys.maxsize])
        # Type checking
        self.assertRaises(TypeError, lambda: m[None])
        self.assertRaises(TypeError, lambda: m[0.0])
        self.assertRaises(TypeError, lambda: m["a"])
        m = None
        self.assertEqual(sys.getrefcount(b), oldrefcount)

def test_getitem(self):
        for tp in self._types:
            self.check_getitem_with_type(tp)

def test_iter(self):
        for tp in self._types:
            b = tp(self._source)
            m = self._view(b)
            self.assertEqual(list(m), [m[i] for i in range(len(m))])

def test_setitem_readonly(self):
        if not self.ro_type:
            self.skipTest("no read-only type to test")
        b = self.ro_type(self._source)
        oldrefcount = sys.getrefcount(b)
        m = self._view(b)
        def setitem(value):
            m[0] = value
        self.assertRaises(TypeError, setitem, b"a")
        self.assertRaises(TypeError, setitem, 65)
        self.assertRaises(TypeError, setitem, memoryview(b"a"))
        m = None
        self.assertEqual(sys.getrefcount(b), oldrefcount)

def test_setitem_writable(self):
        if not self.rw_type:
            self.skipTest("no writable type to test")
        tp = self.rw_type
        b = self.rw_type(self._source)
        oldrefcount = sys.getrefcount(b)
        m = self._view(b)
        m[0] = ord(b'1')
        self._check_contents(tp, b, b"1bcdef")
        m[0:1] = tp(b"0")
        self._check_contents(tp, b, b"0bcdef")
        m[1:3] = tp(b"12")
        self._check_contents(tp, b, b"012def")
        m[1:1] = tp(b"")
        self._check_contents(tp, b, b"012def")
        m[:] = tp(b"abcdef")
        self._check_contents(tp, b, b"abcdef")

# Overlapping copies of a view into itself
        m[0:3] = m[2:5]
        self._check_contents(tp, b, b"cdedef")
        m[:] = tp(b"abcdef")
        m[2:5] = m[0:3]
        self._check_contents(tp, b, b"ababcf")

def setitem(key, value):
            m[key] = tp(value)
        # Bounds checking
        self.assertRaises(IndexError, setitem, 6, b"a")
        self.assertRaises(IndexError, setitem, -7, b"a")
        self.assertRaises(IndexError, setitem, sys.maxsize, b"a")
        self.assertRaises(IndexError, setitem, -sys.maxsize, b"a")
        # Wrong index/slice types
        self.assertRaises(TypeError, setitem, 0.0, b"a")
        self.assertRaises(TypeError, setitem, (0,), b"a")
        self.assertRaises(TypeError, setitem, (slice(0,1,1), 0), b"a")
        self.assertRaises(TypeError, setitem, (0, slice(0,1,1)), b"a")
        self.assertRaises(TypeError, setitem, (0,), b"a")
        self.assertRaises(TypeError, setitem, "a", b"a")
        # Not implemented: multidimensional slices
        slices = (slice(0,1,1), slice(0,1,2))
        self.assertRaises(NotImplementedError, setitem, slices, b"a")
        # Trying to resize the memory object
        exc = ValueError if m.format == 'c' else TypeError
        self.assertRaises(exc, setitem, 0, b"")
        self.assertRaises(exc, setitem, 0, b"ab")
        self.assertRaises(ValueError, setitem, slice(1,1), b"a")
        self.assertRaises(ValueError, setitem, slice(0,2), b"a")

m = None
        self.assertEqual(sys.getrefcount(b), oldrefcount)

def test_delitem(self):
        for tp in self._types:
            b = tp(self._source)
            m = self._view(b)
            with self.assertRaises(TypeError):
                del m[1]
            with self.assertRaises(TypeError):
                del m[1:4]

def test_tobytes(self):
        for tp in self._types:
            m = self._view(tp(self._source))
            b = m.tobytes()
            # This calls self.getitem_type() on each separate byte of b"abcdef"
            expected = b"".join(
                self.getitem_type(bytes([c])) for c in b"abcdef")
            self.assertEqual(b, expected)
            self.assertIsInstance(b, bytes)

def test_tolist(self):
        for tp in self._types:
            m = self._view(tp(self._source))
            l = m.tolist()
            self.assertEqual(l, list(b"abcdef"))

def test_compare(self):
        # memoryviews can compare for equality with other objects
        # having the buffer interface.
        for tp in self._types:
            m = self._view(tp(self._source))
            for tp_comp in self._types:
                self.assertTrue(m == tp_comp(b"abcdef"))
                self.assertFalse(m != tp_comp(b"abcdef"))
                self.assertFalse(m == tp_comp(b"abcde"))
                self.assertTrue(m != tp_comp(b"abcde"))
                self.assertFalse(m == tp_comp(b"abcde1"))
                self.assertTrue(m != tp_comp(b"abcde1"))
            self.assertTrue(m == m)
            self.assertTrue(m == m[:])
            self.assertTrue(m[0:6] == m[:])
            self.assertFalse(m[0:5] == m)

# Comparison with objects which don't support the buffer API
            self.assertFalse(m == "abcdef")
            self.assertTrue(m != "abcdef")
            self.assertFalse("abcdef" == m)
            self.assertTrue("abcdef" != m)

# Unordered comparisons
            for c in (m, b"abcdef"):
                self.assertRaises(TypeError, lambda: m < c)
                self.assertRaises(TypeError, lambda: c <= m)
                self.assertRaises(TypeError, lambda: m >= c)
                self.assertRaises(TypeError, lambda: c > m)

def check_attributes_with_type(self, tp):
        m = self._view(tp(self._source))
        self.assertEqual(m.format, self.format)
        self.assertEqual(m.itemsize, self.itemsize)
        self.assertEqual(m.ndim, 1)
        self.assertEqual(m.shape, (6,))
        self.assertEqual(len(m), 6)
        self.assertEqual(m.strides, (self.itemsize,))
        self.assertEqual(m.suboffsets, ())
        return m

def test_attributes_readonly(self):
        if not self.ro_type:
            self.skipTest("no read-only type to test")
        m = self.check_attributes_with_type(self.ro_type)
        self.assertEqual(m.readonly, True)

def test_attributes_writable(self):
        if not self.rw_type:
            self.skipTest("no writable type to test")
        m = self.check_attributes_with_type(self.rw_type)
        self.assertEqual(m.readonly, False)

def test_getbuffer(self):
        # Test PyObject_GetBuffer() on a memoryview object.
        for tp in self._types:
            b = tp(self._source)
            oldrefcount = sys.getrefcount(b)
            m = self._view(b)
            oldviewrefcount = sys.getrefcount(m)
            s = str(m, "utf-8")
            self._check_contents(tp, b, s.encode("utf-8"))
            self.assertEqual(sys.getrefcount(m), oldviewrefcount)
            m = None
            self.assertEqual(sys.getrefcount(b), oldrefcount)

def test_gc(self):
        for tp in self._types:
            if not isinstance(tp, type):
                # If tp is a factory rather than a plain type, skip
                continue

class MyView():
                def __init__(self, base):
                    self.m = memoryview(base)
            class MySource(tp):
                pass
            class MyObject:
                pass

# Create a reference cycle through a memoryview object.
            # This exercises mbuf_clear().
            b = MySource(tp(b'abc'))
            m = self._view(b)
            o = MyObject()
            b.m = m
            b.o = o
            wr = weakref.ref(o)
            b = m = o = None
            # The cycle must be broken
            gc.collect()
            self.assertTrue(wr() is None, wr())

# This exercises memory_clear().
            m = MyView(tp(b'abc'))
            o = MyObject()
            m.x = m
            m.o = o
            wr = weakref.ref(o)
            m = o = None
            # The cycle must be broken
            gc.collect()
            self.assertTrue(wr() is None, wr())

def _check_released(self, m, tp):
        check = self.assertRaisesRegex(ValueError, "released")
        with check: bytes(m)
        with check: m.tobytes()
        with check: m.tolist()
        with check: m[0]
        with check: m[0] = b'x'
        with check: len(m)
        with check: m.format
        with check: m.itemsize
        with check: m.ndim
        with check: m.readonly
        with check: m.shape
        with check: m.strides
        with check:
            with m:
                pass
        # str() and repr() still function
        self.assertIn("released memory", str(m))
        self.assertIn("released memory", repr(m))
        self.assertEqual(m, m)
        self.assertNotEqual(m, memoryview(tp(self._source)))
        self.assertNotEqual(m, tp(self._source))

def test_contextmanager(self):
        for tp in self._types:
            b = tp(self._source)
            m = self._view(b)
            with m as cm:
                self.assertIs(cm, m)
            self._check_released(m, tp)
            m = self._view(b)
            # Can release explicitly inside the context manager
            with m:
                m.release()

def test_release(self):
        for tp in self._types:
            b = tp(self._source)
            m = self._view(b)
            m.release()
            self._check_released(m, tp)
            # Can be called a second time (it's a no-op)
            m.release()
            self._check_released(m, tp)

def test_writable_readonly(self):
        # Issue #10451: memoryview incorrectly exposes a readonly
        # buffer as writable causing a segfault if using mmap
        tp = self.ro_type
        if tp is None:
            self.skipTest("no read-only type to test")
        b = tp(self._source)
        m = self._view(b)
        i = io.BytesIO(b'ZZZZ')
        self.assertRaises(TypeError, i.readinto, m)

def test_getbuf_fail(self):
        self.assertRaises(TypeError, self._view, {})

def test_hash(self):
        # Memoryviews of readonly (hashable) types are hashable, and they
        # hash as hash(obj.tobytes()).
        tp = self.ro_type
        if tp is None:
            self.skipTest("no read-only type to test")
        b = tp(self._source)
        m = self._view(b)
        self.assertEqual(hash(m), hash(b"abcdef"))
        # Releasing the memoryview keeps the stored hash value (as with weakrefs)
        m.release()
        self.assertEqual(hash(m), hash(b"abcdef"))
        # Hashing a memoryview for the first time after it is released
        # results in an error (as with weakrefs).
        m = self._view(b)
        m.release()
        self.assertRaises(ValueError, hash, m)

def test_hash_writable(self):
        # Memoryviews of writable types are unhashable
        tp = self.rw_type
        if tp is None:
            self.skipTest("no writable type to test")
        b = tp(self._source)
        m = self._view(b)
        self.assertRaises(ValueError, hash, m)

def test_weakref(self):
        # Check memoryviews are weakrefable
        for tp in self._types:
            b = tp(self._source)
            m = self._view(b)
            L = []
            def callback(wr, b=b):
                L.append(b)
            wr = weakref.ref(m, callback)
            self.assertIs(wr(), m)
            del m
            test.support.gc_collect()
            self.assertIs(wr(), None)
            self.assertIs(L[0], b)

# Variations on source objects for the buffer: bytes-like objects, then arrays
# with itemsize > 1.
# NOTE: support for multi-dimensional objects is unimplemented.

class BaseBytesMemoryTests(AbstractMemoryTests):
    ro_type = bytes
    rw_type = bytearray
    getitem_type = bytes
    itemsize = 1
    format = 'B'

class BaseArrayMemoryTests(AbstractMemoryTests):
    ro_type = None
    rw_type = lambda self, b: array.array('i', list(b))
    getitem_type = lambda self, b: array.array('i', list(b)).tobytes()
    itemsize = array.array('i').itemsize
    format = 'i'

@unittest.skip('XXX test should be adapted for non-byte buffers')
    def test_getbuffer(self):
        pass

@unittest.skip('XXX NotImplementedError: tolist() only supports byte views')
    def test_tolist(self):
        pass

# Variations on indirection levels: memoryview, slice of memoryview,
# slice of slice of memoryview.
# This is important to test allocation subtleties.

class BaseMemoryviewTests:
    def _view(self, obj):
        return memoryview(obj)

def _check_contents(self, tp, obj, contents):
        self.assertEqual(obj, tp(contents))

class BaseMemorySliceTests:
    source_bytes = b"XabcdefY"

def _view(self, obj):
        m = memoryview(obj)
        return m[1:7]

def _check_contents(self, tp, obj, contents):
        self.assertEqual(obj[1:7], tp(contents))

def test_refs(self):
        for tp in self._types:
            m = memoryview(tp(self._source))
            oldrefcount = sys.getrefcount(m)
            m[1:2]
            self.assertEqual(sys.getrefcount(m), oldrefcount)

class BaseMemorySliceSliceTests:
    source_bytes = b"XabcdefY"

def _view(self, obj):
        m = memoryview(obj)
        return m[:7][1:]

def _check_contents(self, tp, obj, contents):
        self.assertEqual(obj[1:7], tp(contents))

# Concrete test classes

class BytesMemoryviewTest(unittest.TestCase,
    BaseMemoryviewTests, BaseBytesMemoryTests):

def test_constructor(self):
        for tp in self._types:
            ob = tp(self._source)
            self.assertTrue(memoryview(ob))
            self.assertTrue(memoryview(object=ob))
            self.assertRaises(TypeError, memoryview)
            self.assertRaises(TypeError, memoryview, ob, ob)
            self.assertRaises(TypeError, memoryview, argument=ob)
            self.assertRaises(TypeError, memoryview, ob, argument=True)

class ArrayMemoryviewTest(unittest.TestCase,
    BaseMemoryviewTests, BaseArrayMemoryTests):

def test_array_assign(self):
        # Issue #4569: segfault when mutating a memoryview with itemsize != 1
        a = array.array('i', range(10))
        m = memoryview(a)
        new_a = array.array('i', range(9, -1, -1))
        m[:] = new_a
        self.assertEqual(a, new_a)

class BytesMemorySliceTest(unittest.TestCase,
    BaseMemorySliceTests, BaseBytesMemoryTests):
    pass

class ArrayMemorySliceTest(unittest.TestCase,
    BaseMemorySliceTests, BaseArrayMemoryTests):
    pass

class BytesMemorySliceSliceTest(unittest.TestCase,
    BaseMemorySliceSliceTests, BaseBytesMemoryTests):
    pass

class ArrayMemorySliceSliceTest(unittest.TestCase,
    BaseMemorySliceSliceTests, BaseArrayMemoryTests):
    pass

def test_main():
    test.support.run_unittest(__name__)

if __name__ == "__main__":
    test_main()