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Name	Size	Permission
audiodata	[ DIR ]	drwxr-xr-x
certdata	[ DIR ]	drwxr-xr-x
cjkencodings	[ DIR ]	drwxr-xr-x
configdata	[ DIR ]	drwxr-xr-x
crashers	[ DIR ]	drwxr-xr-x
data	[ DIR ]	drwxr-xr-x
decimaltestdata	[ DIR ]	drwxr-xr-x
dtracedata	[ DIR ]	drwxr-xr-x
encoded_modules	[ DIR ]	drwxr-xr-x
imghdrdata	[ DIR ]	drwxr-xr-x
leakers	[ DIR ]	drwxr-xr-x
libregrtest	[ DIR ]	drwxr-xr-x
regrtestdata	[ DIR ]	drwxr-xr-x
sndhdrdata	[ DIR ]	drwxr-xr-x
subprocessdata	[ DIR ]	drwxr-xr-x
support	[ DIR ]	drwxr-xr-x
test_asyncio	[ DIR ]	drwxr-xr-x
test_capi	[ DIR ]	drwxr-xr-x
test_concurrent_futures	[ DIR ]	drwxr-xr-x
test_cppext	[ DIR ]	drwxr-xr-x
test_ctypes	[ DIR ]	drwxr-xr-x
test_dataclasses	[ DIR ]	drwxr-xr-x
test_doctest	[ DIR ]	drwxr-xr-x
test_email	[ DIR ]	drwxr-xr-x
test_future_stmt	[ DIR ]	drwxr-xr-x
test_gdb	[ DIR ]	drwxr-xr-x
test_import	[ DIR ]	drwxr-xr-x
test_importlib	[ DIR ]	drwxr-xr-x
test_inspect	[ DIR ]	drwxr-xr-x
test_json	[ DIR ]	drwxr-xr-x
test_lib2to3	[ DIR ]	drwxr-xr-x
test_module	[ DIR ]	drwxr-xr-x
test_multiprocessing_fork	[ DIR ]	drwxr-xr-x
test_multiprocessing_forkserve...	[ DIR ]	drwxr-xr-x
test_multiprocessing_spawn	[ DIR ]	drwxr-xr-x
test_peg_generator	[ DIR ]	drwxr-xr-x
test_pydoc	[ DIR ]	drwxr-xr-x
test_sqlite3	[ DIR ]	drwxr-xr-x
test_tkinter	[ DIR ]	drwxr-xr-x
test_tomllib	[ DIR ]	drwxr-xr-x
test_tools	[ DIR ]	drwxr-xr-x
test_ttk	[ DIR ]	drwxr-xr-x
test_unittest	[ DIR ]	drwxr-xr-x
test_warnings	[ DIR ]	drwxr-xr-x
test_zipfile	[ DIR ]	drwxr-xr-x
test_zoneinfo	[ DIR ]	drwxr-xr-x
tokenizedata	[ DIR ]	drwxr-xr-x
tracedmodules	[ DIR ]	drwxr-xr-x
typinganndata	[ DIR ]	drwxr-xr-x
wheeldata	[ DIR ]	drwxr-xr-x
xmltestdata	[ DIR ]	drwxr-xr-x
ziptestdata	[ DIR ]	drwxr-xr-x
Sine-1000Hz-300ms.aif	60.25 KB	-rw-r--r--
__init__.py	47 B	-rw-r--r--
__main__.py	67 B	-rw-r--r--
_test_atexit.py	3.61 KB	-rw-r--r--
_test_eintr.py	17.75 KB	-rw-r--r--
_test_embed_set_config.py	8.64 KB	-rw-r--r--
_test_embed_structseq.py	1.99 KB	-rw-r--r--
_test_multiprocessing.py	206.66 KB	-rw-r--r--
_test_venv_multiprocessing.py	796 B	-rw-r--r--
archiver_tests.py	6.1 KB	-rw-r--r--
audiotest.au	27.48 KB	-rw-r--r--
audiotests.py	12.13 KB	-rw-r--r--
audit-tests.py	13.19 KB	-rw-r--r--
autotest.py	214 B	-rw-r--r--
badsyntax_pep3120.py	14 B	-rw-r--r--
bisect_cmd.py	5.34 KB	-rwxr-xr-x
clinic.test.c	138.59 KB	-rw-r--r--
cmath_testcases.txt	141.2 KB	-rw-r--r--
curses_tests.py	1.21 KB	-rwxr-xr-x
datetimetester.py	260.28 KB	-rw-r--r--
dis_module.py	76 B	-rw-r--r--
empty.vbs	70 B	-rw-r--r--
exception_hierarchy.txt	2.33 KB	-rw-r--r--
floating_points.txt	15.92 KB	-rw-r--r--
fork_wait.py	2.29 KB	-rw-r--r--
formatfloat_testcases.txt	7.45 KB	-rw-r--r--
ieee754.txt	3.15 KB	-rw-r--r--
levenshtein_examples.json	406.44 KB	-rw-r--r--
list_tests.py	16.64 KB	-rw-r--r--
lock_tests.py	35.48 KB	-rw-r--r--
mailcap.txt	1.24 KB	-rw-r--r--
mapping_tests.py	21.87 KB	-rw-r--r--
math_testcases.txt	23.19 KB	-rw-r--r--
memory_watchdog.py	711 B	-rw-r--r--
mime.types	47.37 KB	-rw-r--r--
mock_socket.py	3.69 KB	-rw-r--r--
mp_fork_bomb.py	448 B	-rw-r--r--
mp_preload.py	351 B	-rw-r--r--
multibytecodec_support.py	14.19 KB	-rw-r--r--
pickletester.py	143.84 KB	-rw-r--r--
profilee.py	2.97 KB	-rw-r--r--
pstats.pck	65.05 KB	-rw-r--r--
pyclbr_input.py	648 B	-rw-r--r--
pythoninfo.py	28.32 KB	-rw-r--r--
randv2_32.pck	7.34 KB	-rw-r--r--
randv2_64.pck	7.19 KB	-rw-r--r--
randv3.pck	7.82 KB	-rw-r--r--
re_tests.py	25.93 KB	-rwxr-xr-x
recursion.tar	516 B	-rw-r--r--
regrtest.py	1.27 KB	-rwxr-xr-x
relimport.py	27 B	-rw-r--r--
reperf.py	538 B	-rw-r--r--
seq_tests.py	14.96 KB	-rw-r--r--
signalinterproctester.py	3.12 KB	-rw-r--r--
ssl_servers.py	7.12 KB	-rw-r--r--
ssltests.py	1.03 KB	-rw-r--r--
string_tests.py	71.24 KB	-rw-r--r--
test___all__.py	5.04 KB	-rw-r--r--
test__locale.py	8.09 KB	-rw-r--r--
test__opcode.py	4.14 KB	-rw-r--r--
test__osx_support.py	13.62 KB	-rw-r--r--
test__xxinterpchannels.py	52.19 KB	-rw-r--r--
test__xxsubinterpreters.py	27.5 KB	-rw-r--r--
test_abc.py	23.81 KB	-rw-r--r--
test_abstract_numbers.py	5.81 KB	-rw-r--r--
test_aifc.py	17.84 KB	-rw-r--r--
test_argparse.py	189 KB	-rw-r--r--
test_array.py	55.27 KB	-rwxr-xr-x
test_asdl_parser.py	4.44 KB	-rw-r--r--
test_ast.py	140.71 KB	-rw-r--r--
test_asyncgen.py	47.39 KB	-rw-r--r--
test_atexit.py	3.2 KB	-rw-r--r--
test_audioop.py	28.32 KB	-rw-r--r--
test_audit.py	8.6 KB	-rw-r--r--
test_augassign.py	7.68 KB	-rw-r--r--
test_base64.py	35.05 KB	-rw-r--r--
test_baseexception.py	7.77 KB	-rw-r--r--
test_bdb.py	43.75 KB	-rw-r--r--
test_bigaddrspace.py	2.83 KB	-rw-r--r--
test_bigmem.py	45.01 KB	-rw-r--r--
test_binascii.py	19.35 KB	-rw-r--r--
test_binop.py	14.14 KB	-rw-r--r--
test_bisect.py	16.63 KB	-rw-r--r--
test_bool.py	14.25 KB	-rw-r--r--
test_buffer.py	171.31 KB	-rw-r--r--
test_bufio.py	2.56 KB	-rw-r--r--
test_builtin.py	95.14 KB	-rw-r--r--
test_bytes.py	80.57 KB	-rw-r--r--
test_bz2.py	42.61 KB	-rw-r--r--
test_c_locale_coercion.py	20.99 KB	-rw-r--r--
test_calendar.py	51.25 KB	-rw-r--r--
test_call.py	35.21 KB	-rw-r--r--
test_cgi.py	22.27 KB	-rw-r--r--
test_cgitb.py	2.62 KB	-rw-r--r--
test_charmapcodec.py	1.77 KB	-rw-r--r--
test_class.py	19.77 KB	-rw-r--r--
test_clinic.py	83.96 KB	-rw-r--r--
test_cmath.py	23.55 KB	-rw-r--r--
test_cmd.py	6.49 KB	-rw-r--r--
test_cmd_line.py	39.51 KB	-rw-r--r--
test_cmd_line_script.py	34.93 KB	-rw-r--r--
test_code.py	25.7 KB	-rw-r--r--
test_code_module.py	5.53 KB	-rw-r--r--
test_codeccallbacks.py	47.43 KB	-rw-r--r--
test_codecencodings_cn.py	3.86 KB	-rw-r--r--
test_codecencodings_hk.py	701 B	-rw-r--r--
test_codecencodings_iso2022.py	3.65 KB	-rw-r--r--
test_codecencodings_jp.py	4.79 KB	-rw-r--r--
test_codecencodings_kr.py	2.96 KB	-rw-r--r--
test_codecencodings_tw.py	681 B	-rw-r--r--
test_codecmaps_cn.py	746 B	-rw-r--r--
test_codecmaps_hk.py	386 B	-rw-r--r--
test_codecmaps_jp.py	1.7 KB	-rw-r--r--
test_codecmaps_kr.py	1.16 KB	-rw-r--r--
test_codecmaps_tw.py	705 B	-rw-r--r--
test_codecs.py	136.12 KB	-rw-r--r--
test_codeop.py	8.68 KB	-rw-r--r--
test_collections.py	93.47 KB	-rw-r--r--
test_colorsys.py	4.27 KB	-rw-r--r--
test_compare.py	17.46 KB	-rw-r--r--
test_compile.py	78.68 KB	-rw-r--r--
test_compileall.py	48.27 KB	-rw-r--r--
test_compiler_assemble.py	2.46 KB	-rw-r--r--
test_compiler_codegen.py	1.69 KB	-rw-r--r--
test_complex.py	35.37 KB	-rw-r--r--
test_configparser.py	85.34 KB	-rw-r--r--
test_contains.py	3.35 KB	-rw-r--r--
test_context.py	30.78 KB	-rw-r--r--
test_contextlib.py	43.12 KB	-rw-r--r--
test_contextlib_async.py	23.99 KB	-rw-r--r--
test_copy.py	26.52 KB	-rw-r--r--
test_copyreg.py	4.36 KB	-rw-r--r--
test_coroutines.py	67.47 KB	-rw-r--r--
test_cprofile.py	7.36 KB	-rw-r--r--
test_crashers.py	1.17 KB	-rw-r--r--
test_crypt.py	4.19 KB	-rw-r--r--
test_csv.py	61.27 KB	-rw-r--r--
test_curses.py	49.54 KB	-rw-r--r--
test_datetime.py	2.53 KB	-rw-r--r--
test_dbm.py	6.83 KB	-rw-r--r--
test_dbm_dumb.py	11.08 KB	-rw-r--r--
test_dbm_gnu.py	7.24 KB	-rw-r--r--
test_dbm_ndbm.py	5.91 KB	-rw-r--r--
test_decimal.py	216.13 KB	-rw-r--r--
test_decorators.py	14.63 KB	-rw-r--r--
test_defaultdict.py	6.1 KB	-rw-r--r--
test_deque.py	33.16 KB	-rw-r--r--
test_descr.py	196.13 KB	-rw-r--r--
test_descrtut.py	10.98 KB	-rw-r--r--
test_devpoll.py	4.44 KB	-rw-r--r--
test_dict.py	50.92 KB	-rw-r--r--
test_dict_version.py	6.1 KB	-rw-r--r--
test_dictcomps.py	5.15 KB	-rw-r--r--
test_dictviews.py	14.82 KB	-rw-r--r--
test_difflib.py	21.47 KB	-rw-r--r--
test_difflib_expect.html	100.85 KB	-rw-r--r--
test_dis.py	83 KB	-rw-r--r--
test_docxmlrpc.py	9.1 KB	-rw-r--r--
test_dtrace.py	7.98 KB	-rw-r--r--
test_dynamic.py	6 KB	-rw-r--r--
test_dynamicclassattribute.py	9.57 KB	-rw-r--r--
test_eintr.py	627 B	-rw-r--r--
test_embed.py	69.41 KB	-rw-r--r--
test_ensurepip.py	11.49 KB	-rw-r--r--
test_enum.py	186.78 KB	-rw-r--r--
test_enumerate.py	9.14 KB	-rw-r--r--
test_eof.py	3.1 KB	-rw-r--r--
test_epoll.py	9.4 KB	-rw-r--r--
test_errno.py	1.04 KB	-rw-r--r--
test_except_star.py	38.25 KB	-rw-r--r--
test_exception_group.py	34.03 KB	-rw-r--r--
test_exception_hierarchy.py	7.54 KB	-rw-r--r--
test_exception_variations.py	13.74 KB	-rw-r--r--
test_exceptions.py	76.46 KB	-rw-r--r--
test_extcall.py	14.69 KB	-rw-r--r--
test_faulthandler.py	30.31 KB	-rw-r--r--
test_fcntl.py	7.76 KB	-rw-r--r--
test_file.py	11.78 KB	-rw-r--r--
test_file_eintr.py	10.74 KB	-rw-r--r--
test_filecmp.py	10.33 KB	-rw-r--r--
test_fileinput.py	37.85 KB	-rw-r--r--
test_fileio.py	19.98 KB	-rw-r--r--
test_fileutils.py	951 B	-rw-r--r--
test_finalization.py	14.66 KB	-rw-r--r--
test_float.py	64.76 KB	-rw-r--r--
test_flufl.py	1.53 KB	-rw-r--r--
test_fnmatch.py	10.68 KB	-rw-r--r--
test_fork1.py	3.3 KB	-rw-r--r--
test_format.py	28.44 KB	-rw-r--r--
test_fractions.py	52.53 KB	-rw-r--r--
test_frame.py	14.04 KB	-rw-r--r--
test_frozen.py	2.2 KB	-rw-r--r--
test_fstring.py	64.71 KB	-rw-r--r--
test_ftplib.py	41.94 KB	-rw-r--r--
test_funcattrs.py	15.57 KB	-rw-r--r--
test_functools.py	109.31 KB	-rw-r--r--
test_gc.py	47.71 KB	-rw-r--r--
test_generator_stop.py	943 B	-rw-r--r--
test_generators.py	66.13 KB	-rw-r--r--
test_genericalias.py	17.78 KB	-rw-r--r--
test_genericclass.py	9.44 KB	-rw-r--r--
test_genericpath.py	22.29 KB	-rw-r--r--
test_genexps.py	7.3 KB	-rw-r--r--
test_getopt.py	6.6 KB	-rw-r--r--
test_getpass.py	6.37 KB	-rw-r--r--
test_getpath.py	44.36 KB	-rw-r--r--
test_gettext.py	35.67 KB	-rw-r--r--
test_glob.py	17.19 KB	-rw-r--r--
test_global.py	1.2 KB	-rw-r--r--
test_grammar.py	65.97 KB	-rw-r--r--
test_graphlib.py	8.31 KB	-rw-r--r--
test_grp.py	3.67 KB	-rw-r--r--
test_gzip.py	40.94 KB	-rw-r--r--
test_hash.py	12.11 KB	-rw-r--r--
test_hashlib.py	46.71 KB	-rw-r--r--
test_heapq.py	16.42 KB	-rw-r--r--
test_hmac.py	26.06 KB	-rw-r--r--
test_html.py	4.23 KB	-rw-r--r--
test_htmlparser.py	33.37 KB	-rw-r--r--
test_http_cookiejar.py	81.57 KB	-rw-r--r--
test_http_cookies.py	18.7 KB	-rw-r--r--
test_httplib.py	96.14 KB	-rw-r--r--
test_httpservers.py	56.43 KB	-rw-r--r--
test_idle.py	831 B	-rw-r--r--
test_imaplib.py	41.69 KB	-rw-r--r--
test_imghdr.py	4.81 KB	-rw-r--r--
test_index.py	8.37 KB	-rw-r--r--
test_int.py	33.34 KB	-rw-r--r--
test_int_literal.py	6.89 KB	-rw-r--r--
test_interpreters.py	32.11 KB	-rw-r--r--
test_io.py	182.76 KB	-rw-r--r--
test_ioctl.py	3.24 KB	-rw-r--r--
test_ipaddress.py	119.17 KB	-rw-r--r--
test_isinstance.py	12.95 KB	-rw-r--r--
test_iter.py	36.77 KB	-rw-r--r--
test_iterlen.py	7.1 KB	-rw-r--r--
test_itertools.py	106.61 KB	-rw-r--r--
test_keyword.py	2 KB	-rw-r--r--
test_keywordonlyarg.py	6.89 KB	-rw-r--r--
test_kqueue.py	9.36 KB	-rw-r--r--
test_largefile.py	10.17 KB	-rw-r--r--
test_launcher.py	27.23 KB	-rw-r--r--
test_linecache.py	11.04 KB	-rw-r--r--
test_list.py	8.93 KB	-rw-r--r--
test_listcomps.py	20.71 KB	-rw-r--r--
test_lltrace.py	3.71 KB	-rw-r--r--
test_locale.py	24.43 KB	-rw-r--r--
test_logging.py	241.62 KB	-rw-r--r--
test_long.py	63.33 KB	-rw-r--r--
test_longexp.py	233 B	-rw-r--r--
test_lzma.py	92.65 KB	-rw-r--r--
test_mailbox.py	93.91 KB	-rw-r--r--
test_mailcap.py	11.48 KB	-rw-r--r--
test_marshal.py	23.15 KB	-rw-r--r--
test_math.py	107.6 KB	-rw-r--r--
test_math_property.py	1.15 KB	-rw-r--r--
test_memoryio.py	32.65 KB	-rw-r--r--
test_memoryview.py	21.76 KB	-rw-r--r--
test_metaclass.py	6.19 KB	-rw-r--r--
test_mimetypes.py	15.28 KB	-rw-r--r--
test_minidom.py	68.42 KB	-rw-r--r--
test_mmap.py	38.56 KB	-rw-r--r--
test_modulefinder.py	12.21 KB	-rw-r--r--
test_monitoring.py	55.76 KB	-rw-r--r--
test_msilib.py	5.52 KB	-rw-r--r--
test_multibytecodec.py	15.79 KB	-rw-r--r--
test_multiprocessing_main_hand...	11.48 KB	-rw-r--r--
test_named_expressions.py	29.62 KB	-rw-r--r--
test_netrc.py	11.86 KB	-rw-r--r--
test_nis.py	1.25 KB	-rw-r--r--
test_nntplib.py	62.7 KB	-rw-r--r--
test_ntpath.py	52.48 KB	-rw-r--r--
test_numeric_tower.py	8 KB	-rw-r--r--
test_opcache.py	10.89 KB	-rw-r--r--
test_opcodes.py	3.62 KB	-rw-r--r--
test_openpty.py	600 B	-rw-r--r--
test_operator.py	26.72 KB	-rw-r--r--
test_optparse.py	61.02 KB	-rw-r--r--
test_ordered_dict.py	35.62 KB	-rw-r--r--
test_os.py	179.95 KB	-rw-r--r--
test_ossaudiodev.py	7.27 KB	-rw-r--r--
test_osx_env.py	1.31 KB	-rw-r--r--
test_pathlib.py	137.81 KB	-rw-r--r--
test_patma.py	86.03 KB	-rw-r--r--
test_pdb.py	86.53 KB	-rw-r--r--
test_peepholer.py	40.6 KB	-rw-r--r--
test_pep646_syntax.py	7.79 KB	-rw-r--r--
test_perf_profiler.py	11.27 KB	-rw-r--r--
test_perfmaps.py	685 B	-rw-r--r--
test_pickle.py	20.75 KB	-rw-r--r--
test_picklebuffer.py	4.99 KB	-rw-r--r--
test_pickletools.py	4.13 KB	-rw-r--r--
test_pipes.py	6.79 KB	-rw-r--r--
test_pkg.py	9.59 KB	-rw-r--r--
test_pkgutil.py	22.36 KB	-rw-r--r--
test_platform.py	21.59 KB	-rw-r--r--
test_plistlib.py	41.25 KB	-rw-r--r--
test_poll.py	7.39 KB	-rw-r--r--
test_popen.py	2.11 KB	-rw-r--r--
test_poplib.py	17.05 KB	-rw-r--r--
test_positional_only_arg.py	18.44 KB	-rw-r--r--
test_posix.py	95.07 KB	-rw-r--r--
test_posixpath.py	33.75 KB	-rw-r--r--
test_pow.py	6.38 KB	-rw-r--r--
test_pprint.py	50.59 KB	-rw-r--r--
test_print.py	7.72 KB	-rw-r--r--
test_profile.py	8.69 KB	-rw-r--r--
test_property.py	18.03 KB	-rw-r--r--
test_pstats.py	4.31 KB	-rw-r--r--
test_pty.py	16.18 KB	-rw-r--r--
test_pulldom.py	12.33 KB	-rw-r--r--
test_pwd.py	4.32 KB	-rw-r--r--
test_py_compile.py	11.93 KB	-rw-r--r--
test_pyclbr.py	10.15 KB	-rw-r--r--
test_pyexpat.py	29.35 KB	-rw-r--r--
test_queue.py	20.61 KB	-rw-r--r--
test_quopri.py	7.87 KB	-rw-r--r--
test_raise.py	13.44 KB	-rw-r--r--
test_random.py	56.69 KB	-rw-r--r--
test_range.py	26.53 KB	-rw-r--r--
test_re.py	131.37 KB	-rw-r--r--
test_readline.py	12.76 KB	-rw-r--r--
test_regrtest.py	90.02 KB	-rw-r--r--
test_repl.py	4.99 KB	-rw-r--r--
test_reprlib.py	27.77 KB	-rw-r--r--
test_resource.py	7.12 KB	-rw-r--r--
test_richcmp.py	11.95 KB	-rw-r--r--
test_rlcompleter.py	7.4 KB	-rw-r--r--
test_robotparser.py	11.02 KB	-rw-r--r--
test_runpy.py	33.95 KB	-rw-r--r--
test_sax.py	54.63 KB	-rw-r--r--
test_sched.py	7.38 KB	-rw-r--r--
test_scope.py	21.21 KB	-rw-r--r--
test_script_helper.py	5.82 KB	-rw-r--r--
test_secrets.py	4.28 KB	-rw-r--r--
test_select.py	3.42 KB	-rw-r--r--
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Code Editor : test_zlib.py

import unittest
from test import support
from test.support import import_helper
import binascii
import copy
import os
import pickle
import random
import sys
from test.support import bigmemtest, _1G, _4G, skip_on_s390x

zlib = import_helper.import_module('zlib')

requires_Compress_copy = unittest.skipUnless(
        hasattr(zlib.compressobj(), "copy"),
        'requires Compress.copy()')
requires_Decompress_copy = unittest.skipUnless(
        hasattr(zlib.decompressobj(), "copy"),
        'requires Decompress.copy()')

def _zlib_runtime_version_tuple(zlib_version=zlib.ZLIB_RUNTIME_VERSION):
    # Register "1.2.3" as "1.2.3.0"
    # or "1.2.0-linux","1.2.0.f","1.2.0.f-linux"
    v = zlib_version.split('-', 1)[0].split('.')
    if len(v) < 4:
        v.append('0')
    elif not v[-1].isnumeric():
        v[-1] = '0'
    return tuple(map(int, v))

ZLIB_RUNTIME_VERSION_TUPLE = _zlib_runtime_version_tuple()

# bpo-46623: On s390x, when a hardware accelerator is used, using different
# ways to compress data with zlib can produce different compressed data.
# Simplified test_pair() code:
#
#   def func1(data):
#       return zlib.compress(data)
#
#   def func2(data)
#       co = zlib.compressobj()
#       x1 = co.compress(data)
#       x2 = co.flush()
#       return x1 + x2
#
# On s390x if zlib uses a hardware accelerator, func1() creates a single
# "final" compressed block whereas func2() produces 3 compressed blocks (the
# last one is a final block). On other platforms with no accelerator, func1()
# and func2() produce the same compressed data made of a single (final)
# compressed block.
#
# Only the compressed data is different, the decompression returns the original
# data:
#
#   zlib.decompress(func1(data)) == zlib.decompress(func2(data)) == data
#
# Make the assumption that s390x always has an accelerator to simplify the skip
# condition.

class VersionTestCase(unittest.TestCase):

def test_library_version(self):
        # Test that the major version of the actual library in use matches the
        # major version that we were compiled against. We can't guarantee that
        # the minor versions will match (even on the machine on which the module
        # was compiled), and the API is stable between minor versions, so
        # testing only the major versions avoids spurious failures.
        self.assertEqual(zlib.ZLIB_RUNTIME_VERSION[0], zlib.ZLIB_VERSION[0])

class ChecksumTestCase(unittest.TestCase):
    # checksum test cases
    def test_crc32start(self):
        self.assertEqual(zlib.crc32(b""), zlib.crc32(b"", 0))
        self.assertTrue(zlib.crc32(b"abc", 0xffffffff))

def test_crc32empty(self):
        self.assertEqual(zlib.crc32(b"", 0), 0)
        self.assertEqual(zlib.crc32(b"", 1), 1)
        self.assertEqual(zlib.crc32(b"", 432), 432)

def test_adler32start(self):
        self.assertEqual(zlib.adler32(b""), zlib.adler32(b"", 1))
        self.assertTrue(zlib.adler32(b"abc", 0xffffffff))

def test_adler32empty(self):
        self.assertEqual(zlib.adler32(b"", 0), 0)
        self.assertEqual(zlib.adler32(b"", 1), 1)
        self.assertEqual(zlib.adler32(b"", 432), 432)

def test_penguins(self):
        self.assertEqual(zlib.crc32(b"penguin", 0), 0x0e5c1a120)
        self.assertEqual(zlib.crc32(b"penguin", 1), 0x43b6aa94)
        self.assertEqual(zlib.adler32(b"penguin", 0), 0x0bcf02f6)
        self.assertEqual(zlib.adler32(b"penguin", 1), 0x0bd602f7)

self.assertEqual(zlib.crc32(b"penguin"), zlib.crc32(b"penguin", 0))
        self.assertEqual(zlib.adler32(b"penguin"),zlib.adler32(b"penguin",1))

def test_crc32_adler32_unsigned(self):
        foo = b'abcdefghijklmnop'
        # explicitly test signed behavior
        self.assertEqual(zlib.crc32(foo), 2486878355)
        self.assertEqual(zlib.crc32(b'spam'), 1138425661)
        self.assertEqual(zlib.adler32(foo+foo), 3573550353)
        self.assertEqual(zlib.adler32(b'spam'), 72286642)

def test_same_as_binascii_crc32(self):
        foo = b'abcdefghijklmnop'
        crc = 2486878355
        self.assertEqual(binascii.crc32(foo), crc)
        self.assertEqual(zlib.crc32(foo), crc)
        self.assertEqual(binascii.crc32(b'spam'), zlib.crc32(b'spam'))

# Issue #10276 - check that inputs >=4 GiB are handled correctly.
class ChecksumBigBufferTestCase(unittest.TestCase):

@bigmemtest(size=_4G + 4, memuse=1, dry_run=False)
    def test_big_buffer(self, size):
        data = b"nyan" * (_1G + 1)
        self.assertEqual(zlib.crc32(data), 1044521549)
        self.assertEqual(zlib.adler32(data), 2256789997)

class ExceptionTestCase(unittest.TestCase):
    # make sure we generate some expected errors
    def test_badlevel(self):
        # specifying compression level out of range causes an error
        # (but -1 is Z_DEFAULT_COMPRESSION and apparently the zlib
        # accepts 0 too)
        self.assertRaises(zlib.error, zlib.compress, b'ERROR', 10)

def test_badargs(self):
        self.assertRaises(TypeError, zlib.adler32)
        self.assertRaises(TypeError, zlib.crc32)
        self.assertRaises(TypeError, zlib.compress)
        self.assertRaises(TypeError, zlib.decompress)
        for arg in (42, None, '', 'abc', (), []):
            self.assertRaises(TypeError, zlib.adler32, arg)
            self.assertRaises(TypeError, zlib.crc32, arg)
            self.assertRaises(TypeError, zlib.compress, arg)
            self.assertRaises(TypeError, zlib.decompress, arg)

def test_badcompressobj(self):
        # verify failure on building compress object with bad params
        self.assertRaises(ValueError, zlib.compressobj, 1, zlib.DEFLATED, 0)
        # specifying total bits too large causes an error
        self.assertRaises(ValueError,
                zlib.compressobj, 1, zlib.DEFLATED, zlib.MAX_WBITS + 1)

def test_baddecompressobj(self):
        # verify failure on building decompress object with bad params
        self.assertRaises(ValueError, zlib.decompressobj, -1)

def test_decompressobj_badflush(self):
        # verify failure on calling decompressobj.flush with bad params
        self.assertRaises(ValueError, zlib.decompressobj().flush, 0)
        self.assertRaises(ValueError, zlib.decompressobj().flush, -1)

@support.cpython_only
    def test_overflow(self):
        with self.assertRaisesRegex(OverflowError, 'int too large'):
            zlib.decompress(b'', 15, sys.maxsize + 1)
        with self.assertRaisesRegex(OverflowError, 'int too large'):
            zlib.decompressobj().decompress(b'', sys.maxsize + 1)
        with self.assertRaisesRegex(OverflowError, 'int too large'):
            zlib.decompressobj().flush(sys.maxsize + 1)

@support.cpython_only
    def test_disallow_instantiation(self):
        # Ensure that the type disallows instantiation (bpo-43916)
        support.check_disallow_instantiation(self, type(zlib.compressobj()))
        support.check_disallow_instantiation(self, type(zlib.decompressobj()))

class BaseCompressTestCase(object):
    def check_big_compress_buffer(self, size, compress_func):
        _1M = 1024 * 1024
        # Generate 10 MiB worth of random, and expand it by repeating it.
        # The assumption is that zlib's memory is not big enough to exploit
        # such spread out redundancy.
        data = random.randbytes(_1M * 10)
        data = data * (size // len(data) + 1)
        try:
            compress_func(data)
        finally:
            # Release memory
            data = None

def check_big_decompress_buffer(self, size, decompress_func):
        data = b'x' * size
        try:
            compressed = zlib.compress(data, 1)
        finally:
            # Release memory
            data = None
        data = decompress_func(compressed)
        # Sanity check
        try:
            self.assertEqual(len(data), size)
            self.assertEqual(len(data.strip(b'x')), 0)
        finally:
            data = None

class CompressTestCase(BaseCompressTestCase, unittest.TestCase):
    # Test compression in one go (whole message compression)
    def test_speech(self):
        x = zlib.compress(HAMLET_SCENE)
        self.assertEqual(zlib.decompress(x), HAMLET_SCENE)

def test_keywords(self):
        x = zlib.compress(HAMLET_SCENE, level=3)
        self.assertEqual(zlib.decompress(x), HAMLET_SCENE)
        with self.assertRaises(TypeError):
            zlib.compress(data=HAMLET_SCENE, level=3)
        self.assertEqual(zlib.decompress(x,
                                         wbits=zlib.MAX_WBITS,
                                         bufsize=zlib.DEF_BUF_SIZE),
                         HAMLET_SCENE)

@skip_on_s390x
    def test_speech128(self):
        # compress more data
        data = HAMLET_SCENE * 128
        x = zlib.compress(data)
        self.assertEqual(zlib.compress(bytearray(data)), x)
        for ob in x, bytearray(x):
            self.assertEqual(zlib.decompress(ob), data)

def test_incomplete_stream(self):
        # A useful error message is given
        x = zlib.compress(HAMLET_SCENE)
        self.assertRaisesRegex(zlib.error,
            "Error -5 while decompressing data: incomplete or truncated stream",
            zlib.decompress, x[:-1])

# Memory use of the following functions takes into account overallocation

@bigmemtest(size=_1G + 1024 * 1024, memuse=3)
    def test_big_compress_buffer(self, size):
        compress = lambda s: zlib.compress(s, 1)
        self.check_big_compress_buffer(size, compress)

@bigmemtest(size=_1G + 1024 * 1024, memuse=2)
    def test_big_decompress_buffer(self, size):
        self.check_big_decompress_buffer(size, zlib.decompress)

@bigmemtest(size=_4G, memuse=1)
    def test_large_bufsize(self, size):
        # Test decompress(bufsize) parameter greater than the internal limit
        data = HAMLET_SCENE * 10
        compressed = zlib.compress(data, 1)
        self.assertEqual(zlib.decompress(compressed, 15, size), data)

def test_custom_bufsize(self):
        data = HAMLET_SCENE * 10
        compressed = zlib.compress(data, 1)
        self.assertEqual(zlib.decompress(compressed, 15, CustomInt()), data)

@unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
    @bigmemtest(size=_4G + 100, memuse=4)
    def test_64bit_compress(self, size):
        data = b'x' * size
        try:
            comp = zlib.compress(data, 0)
            self.assertEqual(zlib.decompress(comp), data)
        finally:
            comp = data = None

class CompressObjectTestCase(BaseCompressTestCase, unittest.TestCase):
    # Test compression object
    @skip_on_s390x
    def test_pair(self):
        # straightforward compress/decompress objects
        datasrc = HAMLET_SCENE * 128
        datazip = zlib.compress(datasrc)
        # should compress both bytes and bytearray data
        for data in (datasrc, bytearray(datasrc)):
            co = zlib.compressobj()
            x1 = co.compress(data)
            x2 = co.flush()
            self.assertRaises(zlib.error, co.flush) # second flush should not work
            self.assertEqual(x1 + x2, datazip)
        for v1, v2 in ((x1, x2), (bytearray(x1), bytearray(x2))):
            dco = zlib.decompressobj()
            y1 = dco.decompress(v1 + v2)
            y2 = dco.flush()
            self.assertEqual(data, y1 + y2)
            self.assertIsInstance(dco.unconsumed_tail, bytes)
            self.assertIsInstance(dco.unused_data, bytes)

def test_keywords(self):
        level = 2
        method = zlib.DEFLATED
        wbits = -12
        memLevel = 9
        strategy = zlib.Z_FILTERED
        co = zlib.compressobj(level=level,
                              method=method,
                              wbits=wbits,
                              memLevel=memLevel,
                              strategy=strategy,
                              zdict=b"")
        do = zlib.decompressobj(wbits=wbits, zdict=b"")
        with self.assertRaises(TypeError):
            co.compress(data=HAMLET_SCENE)
        with self.assertRaises(TypeError):
            do.decompress(data=zlib.compress(HAMLET_SCENE))
        x = co.compress(HAMLET_SCENE) + co.flush()
        y = do.decompress(x, max_length=len(HAMLET_SCENE)) + do.flush()
        self.assertEqual(HAMLET_SCENE, y)

def test_compressoptions(self):
        # specify lots of options to compressobj()
        level = 2
        method = zlib.DEFLATED
        wbits = -12
        memLevel = 9
        strategy = zlib.Z_FILTERED
        co = zlib.compressobj(level, method, wbits, memLevel, strategy)
        x1 = co.compress(HAMLET_SCENE)
        x2 = co.flush()
        dco = zlib.decompressobj(wbits)
        y1 = dco.decompress(x1 + x2)
        y2 = dco.flush()
        self.assertEqual(HAMLET_SCENE, y1 + y2)

def test_compressincremental(self):
        # compress object in steps, decompress object as one-shot
        data = HAMLET_SCENE * 128
        co = zlib.compressobj()
        bufs = []
        for i in range(0, len(data), 256):
            bufs.append(co.compress(data[i:i+256]))
        bufs.append(co.flush())
        combuf = b''.join(bufs)

dco = zlib.decompressobj()
        y1 = dco.decompress(b''.join(bufs))
        y2 = dco.flush()
        self.assertEqual(data, y1 + y2)

def test_decompinc(self, flush=False, source=None, cx=256, dcx=64):
        # compress object in steps, decompress object in steps
        source = source or HAMLET_SCENE
        data = source * 128
        co = zlib.compressobj()
        bufs = []
        for i in range(0, len(data), cx):
            bufs.append(co.compress(data[i:i+cx]))
        bufs.append(co.flush())
        combuf = b''.join(bufs)

decombuf = zlib.decompress(combuf)
        # Test type of return value
        self.assertIsInstance(decombuf, bytes)

self.assertEqual(data, decombuf)

dco = zlib.decompressobj()
        bufs = []
        for i in range(0, len(combuf), dcx):
            bufs.append(dco.decompress(combuf[i:i+dcx]))
            self.assertEqual(b'', dco.unconsumed_tail, ########
                             "(A) uct should be b'': not %d long" %
                                       len(dco.unconsumed_tail))
            self.assertEqual(b'', dco.unused_data)
        if flush:
            bufs.append(dco.flush())
        else:
            while True:
                chunk = dco.decompress(b'')
                if chunk:
                    bufs.append(chunk)
                else:
                    break
        self.assertEqual(b'', dco.unconsumed_tail, ########
                         "(B) uct should be b'': not %d long" %
                                       len(dco.unconsumed_tail))
        self.assertEqual(b'', dco.unused_data)
        self.assertEqual(data, b''.join(bufs))
        # Failure means: "decompressobj with init options failed"

def test_decompincflush(self):
        self.test_decompinc(flush=True)

def test_decompimax(self, source=None, cx=256, dcx=64):
        # compress in steps, decompress in length-restricted steps
        source = source or HAMLET_SCENE
        # Check a decompression object with max_length specified
        data = source * 128
        co = zlib.compressobj()
        bufs = []
        for i in range(0, len(data), cx):
            bufs.append(co.compress(data[i:i+cx]))
        bufs.append(co.flush())
        combuf = b''.join(bufs)
        self.assertEqual(data, zlib.decompress(combuf),
                         'compressed data failure')

dco = zlib.decompressobj()
        bufs = []
        cb = combuf
        while cb:
            #max_length = 1 + len(cb)//10
            chunk = dco.decompress(cb, dcx)
            self.assertFalse(len(chunk) > dcx,
                    'chunk too big (%d>%d)' % (len(chunk), dcx))
            bufs.append(chunk)
            cb = dco.unconsumed_tail
        bufs.append(dco.flush())
        self.assertEqual(data, b''.join(bufs), 'Wrong data retrieved')

def test_decompressmaxlen(self, flush=False):
        # Check a decompression object with max_length specified
        data = HAMLET_SCENE * 128
        co = zlib.compressobj()
        bufs = []
        for i in range(0, len(data), 256):
            bufs.append(co.compress(data[i:i+256]))
        bufs.append(co.flush())
        combuf = b''.join(bufs)
        self.assertEqual(data, zlib.decompress(combuf),
                         'compressed data failure')

dco = zlib.decompressobj()
        bufs = []
        cb = combuf
        while cb:
            max_length = 1 + len(cb)//10
            chunk = dco.decompress(cb, max_length)
            self.assertFalse(len(chunk) > max_length,
                        'chunk too big (%d>%d)' % (len(chunk),max_length))
            bufs.append(chunk)
            cb = dco.unconsumed_tail
        if flush:
            bufs.append(dco.flush())
        else:
            while chunk:
                chunk = dco.decompress(b'', max_length)
                self.assertFalse(len(chunk) > max_length,
                            'chunk too big (%d>%d)' % (len(chunk),max_length))
                bufs.append(chunk)
        self.assertEqual(data, b''.join(bufs), 'Wrong data retrieved')

def test_decompressmaxlenflush(self):
        self.test_decompressmaxlen(flush=True)

def test_maxlenmisc(self):
        # Misc tests of max_length
        dco = zlib.decompressobj()
        self.assertRaises(ValueError, dco.decompress, b"", -1)
        self.assertEqual(b'', dco.unconsumed_tail)

def test_maxlen_large(self):
        # Sizes up to sys.maxsize should be accepted, although zlib is
        # internally limited to expressing sizes with unsigned int
        data = HAMLET_SCENE * 10
        self.assertGreater(len(data), zlib.DEF_BUF_SIZE)
        compressed = zlib.compress(data, 1)
        dco = zlib.decompressobj()
        self.assertEqual(dco.decompress(compressed, sys.maxsize), data)

def test_maxlen_custom(self):
        data = HAMLET_SCENE * 10
        compressed = zlib.compress(data, 1)
        dco = zlib.decompressobj()
        self.assertEqual(dco.decompress(compressed, CustomInt()), data[:100])

def test_clear_unconsumed_tail(self):
        # Issue #12050: calling decompress() without providing max_length
        # should clear the unconsumed_tail attribute.
        cdata = b"x\x9cKLJ\x06\x00\x02M\x01"    # "abc"
        dco = zlib.decompressobj()
        ddata = dco.decompress(cdata, 1)
        ddata += dco.decompress(dco.unconsumed_tail)
        self.assertEqual(dco.unconsumed_tail, b"")

def test_flushes(self):
        # Test flush() with the various options, using all the
        # different levels in order to provide more variations.
        sync_opt = ['Z_NO_FLUSH', 'Z_SYNC_FLUSH', 'Z_FULL_FLUSH',
                    'Z_PARTIAL_FLUSH']

# Z_BLOCK has a known failure prior to 1.2.5.3
        if ZLIB_RUNTIME_VERSION_TUPLE >= (1, 2, 5, 3):
            sync_opt.append('Z_BLOCK')

sync_opt = [getattr(zlib, opt) for opt in sync_opt
                    if hasattr(zlib, opt)]
        data = HAMLET_SCENE * 8

for sync in sync_opt:
            for level in range(10):
                try:
                    obj = zlib.compressobj( level )
                    a = obj.compress( data[:3000] )
                    b = obj.flush( sync )
                    c = obj.compress( data[3000:] )
                    d = obj.flush()
                except:
                    print("Error for flush mode={}, level={}"
                          .format(sync, level))
                    raise
                self.assertEqual(zlib.decompress(b''.join([a,b,c,d])),
                                 data, ("Decompress failed: flush "
                                        "mode=%i, level=%i") % (sync, level))
                del obj

@unittest.skipUnless(hasattr(zlib, 'Z_SYNC_FLUSH'),
                         'requires zlib.Z_SYNC_FLUSH')
    def test_odd_flush(self):
        # Test for odd flushing bugs noted in 2.0, and hopefully fixed in 2.1
        import random
        # Testing on 17K of "random" data

# Create compressor and decompressor objects
        co = zlib.compressobj(zlib.Z_BEST_COMPRESSION)
        dco = zlib.decompressobj()

# Try 17K of data
        # generate random data stream
        data = random.randbytes(17 * 1024)

# compress, sync-flush, and decompress
        first = co.compress(data)
        second = co.flush(zlib.Z_SYNC_FLUSH)
        expanded = dco.decompress(first + second)

# if decompressed data is different from the input data, choke.
        self.assertEqual(expanded, data, "17K random source doesn't match")

def test_empty_flush(self):
        # Test that calling .flush() on unused objects works.
        # (Bug #1083110 -- calling .flush() on decompress objects
        # caused a core dump.)

co = zlib.compressobj(zlib.Z_BEST_COMPRESSION)
        self.assertTrue(co.flush())  # Returns a zlib header
        dco = zlib.decompressobj()
        self.assertEqual(dco.flush(), b"") # Returns nothing

def test_dictionary(self):
        h = HAMLET_SCENE
        # Build a simulated dictionary out of the words in HAMLET.
        words = h.split()
        random.shuffle(words)
        zdict = b''.join(words)
        # Use it to compress HAMLET.
        co = zlib.compressobj(zdict=zdict)
        cd = co.compress(h) + co.flush()
        # Verify that it will decompress with the dictionary.
        dco = zlib.decompressobj(zdict=zdict)
        self.assertEqual(dco.decompress(cd) + dco.flush(), h)
        # Verify that it fails when not given the dictionary.
        dco = zlib.decompressobj()
        self.assertRaises(zlib.error, dco.decompress, cd)

def test_dictionary_streaming(self):
        # This simulates the reuse of a compressor object for compressing
        # several separate data streams.
        co = zlib.compressobj(zdict=HAMLET_SCENE)
        do = zlib.decompressobj(zdict=HAMLET_SCENE)
        piece = HAMLET_SCENE[1000:1500]
        d0 = co.compress(piece) + co.flush(zlib.Z_SYNC_FLUSH)
        d1 = co.compress(piece[100:]) + co.flush(zlib.Z_SYNC_FLUSH)
        d2 = co.compress(piece[:-100]) + co.flush(zlib.Z_SYNC_FLUSH)
        self.assertEqual(do.decompress(d0), piece)
        self.assertEqual(do.decompress(d1), piece[100:])
        self.assertEqual(do.decompress(d2), piece[:-100])

def test_decompress_incomplete_stream(self):
        # This is 'foo', deflated
        x = b'x\x9cK\xcb\xcf\x07\x00\x02\x82\x01E'
        # For the record
        self.assertEqual(zlib.decompress(x), b'foo')
        self.assertRaises(zlib.error, zlib.decompress, x[:-5])
        # Omitting the stream end works with decompressor objects
        # (see issue #8672).
        dco = zlib.decompressobj()
        y = dco.decompress(x[:-5])
        y += dco.flush()
        self.assertEqual(y, b'foo')

def test_decompress_eof(self):
        x = b'x\x9cK\xcb\xcf\x07\x00\x02\x82\x01E'  # 'foo'
        dco = zlib.decompressobj()
        self.assertFalse(dco.eof)
        dco.decompress(x[:-5])
        self.assertFalse(dco.eof)
        dco.decompress(x[-5:])
        self.assertTrue(dco.eof)
        dco.flush()
        self.assertTrue(dco.eof)

def test_decompress_eof_incomplete_stream(self):
        x = b'x\x9cK\xcb\xcf\x07\x00\x02\x82\x01E'  # 'foo'
        dco = zlib.decompressobj()
        self.assertFalse(dco.eof)
        dco.decompress(x[:-5])
        self.assertFalse(dco.eof)
        dco.flush()
        self.assertFalse(dco.eof)

def test_decompress_unused_data(self):
        # Repeated calls to decompress() after EOF should accumulate data in
        # dco.unused_data, instead of just storing the arg to the last call.
        source = b'abcdefghijklmnopqrstuvwxyz'
        remainder = b'0123456789'
        y = zlib.compress(source)
        x = y + remainder
        for maxlen in 0, 1000:
            for step in 1, 2, len(y), len(x):
                dco = zlib.decompressobj()
                data = b''
                for i in range(0, len(x), step):
                    if i < len(y):
                        self.assertEqual(dco.unused_data, b'')
                    if maxlen == 0:
                        data += dco.decompress(x[i : i + step])
                        self.assertEqual(dco.unconsumed_tail, b'')
                    else:
                        data += dco.decompress(
                                dco.unconsumed_tail + x[i : i + step], maxlen)
                data += dco.flush()
                self.assertTrue(dco.eof)
                self.assertEqual(data, source)
                self.assertEqual(dco.unconsumed_tail, b'')
                self.assertEqual(dco.unused_data, remainder)

# issue27164
    def test_decompress_raw_with_dictionary(self):
        zdict = b'abcdefghijklmnopqrstuvwxyz'
        co = zlib.compressobj(wbits=-zlib.MAX_WBITS, zdict=zdict)
        comp = co.compress(zdict) + co.flush()
        dco = zlib.decompressobj(wbits=-zlib.MAX_WBITS, zdict=zdict)
        uncomp = dco.decompress(comp) + dco.flush()
        self.assertEqual(zdict, uncomp)

def test_flush_with_freed_input(self):
        # Issue #16411: decompressor accesses input to last decompress() call
        # in flush(), even if this object has been freed in the meanwhile.
        input1 = b'abcdefghijklmnopqrstuvwxyz'
        input2 = b'QWERTYUIOPASDFGHJKLZXCVBNM'
        data = zlib.compress(input1)
        dco = zlib.decompressobj()
        dco.decompress(data, 1)
        del data
        data = zlib.compress(input2)
        self.assertEqual(dco.flush(), input1[1:])

@bigmemtest(size=_4G, memuse=1)
    def test_flush_large_length(self, size):
        # Test flush(length) parameter greater than internal limit UINT_MAX
        input = HAMLET_SCENE * 10
        data = zlib.compress(input, 1)
        dco = zlib.decompressobj()
        dco.decompress(data, 1)
        self.assertEqual(dco.flush(size), input[1:])

def test_flush_custom_length(self):
        input = HAMLET_SCENE * 10
        data = zlib.compress(input, 1)
        dco = zlib.decompressobj()
        dco.decompress(data, 1)
        self.assertEqual(dco.flush(CustomInt()), input[1:])

@requires_Compress_copy
    def test_compresscopy(self):
        # Test copying a compression object
        data0 = HAMLET_SCENE
        data1 = bytes(str(HAMLET_SCENE, "ascii").swapcase(), "ascii")
        for func in lambda c: c.copy(), copy.copy, copy.deepcopy:
            c0 = zlib.compressobj(zlib.Z_BEST_COMPRESSION)
            bufs0 = []
            bufs0.append(c0.compress(data0))

c1 = func(c0)
            bufs1 = bufs0[:]

bufs0.append(c0.compress(data0))
            bufs0.append(c0.flush())
            s0 = b''.join(bufs0)

bufs1.append(c1.compress(data1))
            bufs1.append(c1.flush())
            s1 = b''.join(bufs1)

self.assertEqual(zlib.decompress(s0),data0+data0)
            self.assertEqual(zlib.decompress(s1),data0+data1)

@requires_Compress_copy
    def test_badcompresscopy(self):
        # Test copying a compression object in an inconsistent state
        c = zlib.compressobj()
        c.compress(HAMLET_SCENE)
        c.flush()
        self.assertRaises(ValueError, c.copy)
        self.assertRaises(ValueError, copy.copy, c)
        self.assertRaises(ValueError, copy.deepcopy, c)

@requires_Decompress_copy
    def test_decompresscopy(self):
        # Test copying a decompression object
        data = HAMLET_SCENE
        comp = zlib.compress(data)
        # Test type of return value
        self.assertIsInstance(comp, bytes)

for func in lambda c: c.copy(), copy.copy, copy.deepcopy:
            d0 = zlib.decompressobj()
            bufs0 = []
            bufs0.append(d0.decompress(comp[:32]))

d1 = func(d0)
            bufs1 = bufs0[:]

bufs0.append(d0.decompress(comp[32:]))
            s0 = b''.join(bufs0)

bufs1.append(d1.decompress(comp[32:]))
            s1 = b''.join(bufs1)

self.assertEqual(s0,s1)
            self.assertEqual(s0,data)

@requires_Decompress_copy
    def test_baddecompresscopy(self):
        # Test copying a compression object in an inconsistent state
        data = zlib.compress(HAMLET_SCENE)
        d = zlib.decompressobj()
        d.decompress(data)
        d.flush()
        self.assertRaises(ValueError, d.copy)
        self.assertRaises(ValueError, copy.copy, d)
        self.assertRaises(ValueError, copy.deepcopy, d)

def test_compresspickle(self):
        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
            with self.assertRaises((TypeError, pickle.PicklingError)):
                pickle.dumps(zlib.compressobj(zlib.Z_BEST_COMPRESSION), proto)

def test_decompresspickle(self):
        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
            with self.assertRaises((TypeError, pickle.PicklingError)):
                pickle.dumps(zlib.decompressobj(), proto)

# Memory use of the following functions takes into account overallocation

@bigmemtest(size=_1G + 1024 * 1024, memuse=3)
    def test_big_compress_buffer(self, size):
        c = zlib.compressobj(1)
        compress = lambda s: c.compress(s) + c.flush()
        self.check_big_compress_buffer(size, compress)

@bigmemtest(size=_1G + 1024 * 1024, memuse=2)
    def test_big_decompress_buffer(self, size):
        d = zlib.decompressobj()
        decompress = lambda s: d.decompress(s) + d.flush()
        self.check_big_decompress_buffer(size, decompress)

@unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
    @bigmemtest(size=_4G + 100, memuse=4)
    def test_64bit_compress(self, size):
        data = b'x' * size
        co = zlib.compressobj(0)
        do = zlib.decompressobj()
        try:
            comp = co.compress(data) + co.flush()
            uncomp = do.decompress(comp) + do.flush()
            self.assertEqual(uncomp, data)
        finally:
            comp = uncomp = data = None

@unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
    @bigmemtest(size=_4G + 100, memuse=3)
    def test_large_unused_data(self, size):
        data = b'abcdefghijklmnop'
        unused = b'x' * size
        comp = zlib.compress(data) + unused
        do = zlib.decompressobj()
        try:
            uncomp = do.decompress(comp) + do.flush()
            self.assertEqual(unused, do.unused_data)
            self.assertEqual(uncomp, data)
        finally:
            unused = comp = do = None

@unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
    @bigmemtest(size=_4G + 100, memuse=5)
    def test_large_unconsumed_tail(self, size):
        data = b'x' * size
        do = zlib.decompressobj()
        try:
            comp = zlib.compress(data, 0)
            uncomp = do.decompress(comp, 1) + do.flush()
            self.assertEqual(uncomp, data)
            self.assertEqual(do.unconsumed_tail, b'')
        finally:
            comp = uncomp = data = None

def test_wbits(self):
        # wbits=0 only supported since zlib v1.2.3.5
        supports_wbits_0 = ZLIB_RUNTIME_VERSION_TUPLE >= (1, 2, 3, 5)

co = zlib.compressobj(level=1, wbits=15)
        zlib15 = co.compress(HAMLET_SCENE) + co.flush()
        self.assertEqual(zlib.decompress(zlib15, 15), HAMLET_SCENE)
        if supports_wbits_0:
            self.assertEqual(zlib.decompress(zlib15, 0), HAMLET_SCENE)
        self.assertEqual(zlib.decompress(zlib15, 32 + 15), HAMLET_SCENE)
        with self.assertRaisesRegex(zlib.error, 'invalid window size'):
            zlib.decompress(zlib15, 14)
        dco = zlib.decompressobj(wbits=32 + 15)
        self.assertEqual(dco.decompress(zlib15), HAMLET_SCENE)
        dco = zlib.decompressobj(wbits=14)
        with self.assertRaisesRegex(zlib.error, 'invalid window size'):
            dco.decompress(zlib15)

co = zlib.compressobj(level=1, wbits=9)
        zlib9 = co.compress(HAMLET_SCENE) + co.flush()
        self.assertEqual(zlib.decompress(zlib9, 9), HAMLET_SCENE)
        self.assertEqual(zlib.decompress(zlib9, 15), HAMLET_SCENE)
        if supports_wbits_0:
            self.assertEqual(zlib.decompress(zlib9, 0), HAMLET_SCENE)
        self.assertEqual(zlib.decompress(zlib9, 32 + 9), HAMLET_SCENE)
        dco = zlib.decompressobj(wbits=32 + 9)
        self.assertEqual(dco.decompress(zlib9), HAMLET_SCENE)

co = zlib.compressobj(level=1, wbits=-15)
        deflate15 = co.compress(HAMLET_SCENE) + co.flush()
        self.assertEqual(zlib.decompress(deflate15, -15), HAMLET_SCENE)
        dco = zlib.decompressobj(wbits=-15)
        self.assertEqual(dco.decompress(deflate15), HAMLET_SCENE)

co = zlib.compressobj(level=1, wbits=-9)
        deflate9 = co.compress(HAMLET_SCENE) + co.flush()
        self.assertEqual(zlib.decompress(deflate9, -9), HAMLET_SCENE)
        self.assertEqual(zlib.decompress(deflate9, -15), HAMLET_SCENE)
        dco = zlib.decompressobj(wbits=-9)
        self.assertEqual(dco.decompress(deflate9), HAMLET_SCENE)

co = zlib.compressobj(level=1, wbits=16 + 15)
        gzip = co.compress(HAMLET_SCENE) + co.flush()
        self.assertEqual(zlib.decompress(gzip, 16 + 15), HAMLET_SCENE)
        self.assertEqual(zlib.decompress(gzip, 32 + 15), HAMLET_SCENE)
        dco = zlib.decompressobj(32 + 15)
        self.assertEqual(dco.decompress(gzip), HAMLET_SCENE)

for wbits in (-15, 15, 31):
            with self.subTest(wbits=wbits):
                expected = HAMLET_SCENE
                actual = zlib.decompress(
                    zlib.compress(HAMLET_SCENE, wbits=wbits), wbits=wbits
                )
                self.assertEqual(expected, actual)

def choose_lines(source, number, seed=None, generator=random):
    """Return a list of number lines randomly chosen from the source"""
    if seed is not None:
        generator.seed(seed)
    sources = source.split('\n')
    return [generator.choice(sources) for n in range(number)]

HAMLET_SCENE = b"""
LAERTES

O, fear me not.
       I stay too long: but here my father comes.

Enter POLONIUS

A double blessing is a double grace,
       Occasion smiles upon a second leave.

LORD POLONIUS

Yet here, Laertes! aboard, aboard, for shame!
       The wind sits in the shoulder of your sail,
       And you are stay'd for. There; my blessing with thee!
       And these few precepts in thy memory
       See thou character. Give thy thoughts no tongue,
       Nor any unproportioned thought his act.
       Be thou familiar, but by no means vulgar.
       Those friends thou hast, and their adoption tried,
       Grapple them to thy soul with hoops of steel;
       But do not dull thy palm with entertainment
       Of each new-hatch'd, unfledged comrade. Beware
       Of entrance to a quarrel, but being in,
       Bear't that the opposed may beware of thee.
       Give every man thy ear, but few thy voice;
       Take each man's censure, but reserve thy judgment.
       Costly thy habit as thy purse can buy,
       But not express'd in fancy; rich, not gaudy;
       For the apparel oft proclaims the man,
       And they in France of the best rank and station
       Are of a most select and generous chief in that.
       Neither a borrower nor a lender be;
       For loan oft loses both itself and friend,
       And borrowing dulls the edge of husbandry.
       This above all: to thine ownself be true,
       And it must follow, as the night the day,
       Thou canst not then be false to any man.
       Farewell: my blessing season this in thee!

LAERTES

Most humbly do I take my leave, my lord.

LORD POLONIUS

The time invites you; go; your servants tend.

LAERTES

Farewell, Ophelia; and remember well
       What I have said to you.

OPHELIA

'Tis in my memory lock'd,
       And you yourself shall keep the key of it.

LAERTES

Farewell.
"""

class ZlibDecompressorTest(unittest.TestCase):
    # Test adopted from test_bz2.py
    TEXT = HAMLET_SCENE
    DATA = zlib.compress(HAMLET_SCENE)
    BAD_DATA = b"Not a valid deflate block"
    BIG_TEXT = DATA * ((128 * 1024 // len(DATA)) + 1)
    BIG_DATA = zlib.compress(BIG_TEXT)

def test_Constructor(self):
        self.assertRaises(TypeError, zlib._ZlibDecompressor, "ASDA")
        self.assertRaises(TypeError, zlib._ZlibDecompressor, -15, "notbytes")
        self.assertRaises(TypeError, zlib._ZlibDecompressor, -15, b"bytes", 5)

def testDecompress(self):
        zlibd = zlib._ZlibDecompressor()
        self.assertRaises(TypeError, zlibd.decompress)
        text = zlibd.decompress(self.DATA)
        self.assertEqual(text, self.TEXT)

def testDecompressChunks10(self):
        zlibd = zlib._ZlibDecompressor()
        text = b''
        n = 0
        while True:
            str = self.DATA[n*10:(n+1)*10]
            if not str:
                break
            text += zlibd.decompress(str)
            n += 1
        self.assertEqual(text, self.TEXT)

def testDecompressUnusedData(self):
        zlibd = zlib._ZlibDecompressor()
        unused_data = b"this is unused data"
        text = zlibd.decompress(self.DATA+unused_data)
        self.assertEqual(text, self.TEXT)
        self.assertEqual(zlibd.unused_data, unused_data)

def testEOFError(self):
        zlibd = zlib._ZlibDecompressor()
        text = zlibd.decompress(self.DATA)
        self.assertRaises(EOFError, zlibd.decompress, b"anything")
        self.assertRaises(EOFError, zlibd.decompress, b"")

@support.skip_if_pgo_task
    @bigmemtest(size=_4G + 100, memuse=3.3)
    def testDecompress4G(self, size):
        # "Test zlib._ZlibDecompressor.decompress() with >4GiB input"
        blocksize = min(10 * 1024 * 1024, size)
        block = random.randbytes(blocksize)
        try:
            data = block * ((size-1) // blocksize + 1)
            compressed = zlib.compress(data)
            zlibd = zlib._ZlibDecompressor()
            decompressed = zlibd.decompress(compressed)
            self.assertTrue(decompressed == data)
        finally:
            data = None
            compressed = None
            decompressed = None

def testPickle(self):
        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
            with self.assertRaises(TypeError):
                pickle.dumps(zlib._ZlibDecompressor(), proto)

def testDecompressorChunksMaxsize(self):
        zlibd = zlib._ZlibDecompressor()
        max_length = 100
        out = []

# Feed some input
        len_ = len(self.BIG_DATA) - 64
        out.append(zlibd.decompress(self.BIG_DATA[:len_],
                                  max_length=max_length))
        self.assertFalse(zlibd.needs_input)
        self.assertEqual(len(out[-1]), max_length)

# Retrieve more data without providing more input
        out.append(zlibd.decompress(b'', max_length=max_length))
        self.assertFalse(zlibd.needs_input)
        self.assertEqual(len(out[-1]), max_length)

# Retrieve more data while providing more input
        out.append(zlibd.decompress(self.BIG_DATA[len_:],
                                  max_length=max_length))
        self.assertLessEqual(len(out[-1]), max_length)

# Retrieve remaining uncompressed data
        while not zlibd.eof:
            out.append(zlibd.decompress(b'', max_length=max_length))
            self.assertLessEqual(len(out[-1]), max_length)

out = b"".join(out)
        self.assertEqual(out, self.BIG_TEXT)
        self.assertEqual(zlibd.unused_data, b"")

def test_decompressor_inputbuf_1(self):
        # Test reusing input buffer after moving existing
        # contents to beginning
        zlibd = zlib._ZlibDecompressor()
        out = []

# Create input buffer and fill it
        self.assertEqual(zlibd.decompress(self.DATA[:100],
                                        max_length=0), b'')

# Retrieve some results, freeing capacity at beginning
        # of input buffer
        out.append(zlibd.decompress(b'', 2))

# Add more data that fits into input buffer after
        # moving existing data to beginning
        out.append(zlibd.decompress(self.DATA[100:105], 15))

# Decompress rest of data
        out.append(zlibd.decompress(self.DATA[105:]))
        self.assertEqual(b''.join(out), self.TEXT)

def test_decompressor_inputbuf_2(self):
        # Test reusing input buffer by appending data at the
        # end right away
        zlibd = zlib._ZlibDecompressor()
        out = []

# Create input buffer and empty it
        self.assertEqual(zlibd.decompress(self.DATA[:200],
                                        max_length=0), b'')
        out.append(zlibd.decompress(b''))

# Fill buffer with new data
        out.append(zlibd.decompress(self.DATA[200:280], 2))

# Append some more data, not enough to require resize
        out.append(zlibd.decompress(self.DATA[280:300], 2))

# Decompress rest of data
        out.append(zlibd.decompress(self.DATA[300:]))
        self.assertEqual(b''.join(out), self.TEXT)

def test_decompressor_inputbuf_3(self):
        # Test reusing input buffer after extending it

zlibd = zlib._ZlibDecompressor()
        out = []

# Create almost full input buffer
        out.append(zlibd.decompress(self.DATA[:200], 5))

# Add even more data to it, requiring resize
        out.append(zlibd.decompress(self.DATA[200:300], 5))

# Decompress rest of data
        out.append(zlibd.decompress(self.DATA[300:]))
        self.assertEqual(b''.join(out), self.TEXT)

def test_failure(self):
        zlibd = zlib._ZlibDecompressor()
        self.assertRaises(Exception, zlibd.decompress, self.BAD_DATA * 30)
        # Previously, a second call could crash due to internal inconsistency
        self.assertRaises(Exception, zlibd.decompress, self.BAD_DATA * 30)

@support.refcount_test
    def test_refleaks_in___init__(self):
        gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount')
        zlibd = zlib._ZlibDecompressor()
        refs_before = gettotalrefcount()
        for i in range(100):
            zlibd.__init__()
        self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10)

class CustomInt:
    def __index__(self):
        return 100

if __name__ == "__main__":
    unittest.main()

${this.title}

Code Editor : test_zlib.py