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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_nntplib.py

import io
import socket
import datetime
import textwrap
import unittest
import functools
import contextlib
import os.path
import re
import threading

from test import support
from test.support import socket_helper, warnings_helper
nntplib = warnings_helper.import_deprecated("nntplib")
from nntplib import NNTP, GroupInfo
from unittest.mock import patch
try:
    import ssl
except ImportError:
    ssl = None

certfile = os.path.join(os.path.dirname(__file__), 'certdata', 'keycert3.pem')

if ssl is not None:
    SSLError = ssl.SSLError
else:
    class SSLError(Exception):
        """Non-existent exception class when we lack SSL support."""
        reason = "This will never be raised."

# TODO:
# - test the `file` arg to more commands
# - test error conditions
# - test auth and `usenetrc`

class NetworkedNNTPTestsMixin:

ssl_context = None

def test_welcome(self):
        welcome = self.server.getwelcome()
        self.assertEqual(str, type(welcome))

def test_help(self):
        resp, lines = self.server.help()
        self.assertTrue(resp.startswith("100 "), resp)
        for line in lines:
            self.assertEqual(str, type(line))

def test_list(self):
        resp, groups = self.server.list()
        if len(groups) > 0:
            self.assertEqual(GroupInfo, type(groups[0]))
            self.assertEqual(str, type(groups[0].group))

def test_list_active(self):
        resp, groups = self.server.list(self.GROUP_PAT)
        if len(groups) > 0:
            self.assertEqual(GroupInfo, type(groups[0]))
            self.assertEqual(str, type(groups[0].group))

def test_unknown_command(self):
        with self.assertRaises(nntplib.NNTPPermanentError) as cm:
            self.server._shortcmd("XYZZY")
        resp = cm.exception.response
        self.assertTrue(resp.startswith("500 "), resp)

def test_newgroups(self):
        # gmane gets a constant influx of new groups.  In order not to stress
        # the server too much, we choose a recent date in the past.
        dt = datetime.date.today() - datetime.timedelta(days=7)
        resp, groups = self.server.newgroups(dt)
        if len(groups) > 0:
            self.assertIsInstance(groups[0], GroupInfo)
            self.assertIsInstance(groups[0].group, str)

def test_description(self):
        def _check_desc(desc):
            # Sanity checks
            self.assertIsInstance(desc, str)
            self.assertNotIn(self.GROUP_NAME, desc)
        desc = self.server.description(self.GROUP_NAME)
        _check_desc(desc)
        # Another sanity check
        self.assertIn(self.DESC, desc)
        # With a pattern
        desc = self.server.description(self.GROUP_PAT)
        _check_desc(desc)
        # Shouldn't exist
        desc = self.server.description("zk.brrtt.baz")
        self.assertEqual(desc, '')

def test_descriptions(self):
        resp, descs = self.server.descriptions(self.GROUP_PAT)
        # 215 for LIST NEWSGROUPS, 282 for XGTITLE
        self.assertTrue(
            resp.startswith("215 ") or resp.startswith("282 "), resp)
        self.assertIsInstance(descs, dict)
        desc = descs[self.GROUP_NAME]
        self.assertEqual(desc, self.server.description(self.GROUP_NAME))

def test_group(self):
        result = self.server.group(self.GROUP_NAME)
        self.assertEqual(5, len(result))
        resp, count, first, last, group = result
        self.assertEqual(group, self.GROUP_NAME)
        self.assertIsInstance(count, int)
        self.assertIsInstance(first, int)
        self.assertIsInstance(last, int)
        self.assertLessEqual(first, last)
        self.assertTrue(resp.startswith("211 "), resp)

def test_date(self):
        resp, date = self.server.date()
        self.assertIsInstance(date, datetime.datetime)
        # Sanity check
        self.assertGreaterEqual(date.year, 1995)
        self.assertLessEqual(date.year, 2030)

def _check_art_dict(self, art_dict):
        # Some sanity checks for a field dictionary returned by OVER / XOVER
        self.assertIsInstance(art_dict, dict)
        # NNTP has 7 mandatory fields
        self.assertGreaterEqual(art_dict.keys(),
            {"subject", "from", "date", "message-id",
             "references", ":bytes", ":lines"}
            )
        for v in art_dict.values():
            self.assertIsInstance(v, (str, type(None)))

def test_xover(self):
        resp, count, first, last, name = self.server.group(self.GROUP_NAME)
        resp, lines = self.server.xover(last - 5, last)
        if len(lines) == 0:
            self.skipTest("no articles retrieved")
        # The 'last' article is not necessarily part of the output (cancelled?)
        art_num, art_dict = lines[0]
        self.assertGreaterEqual(art_num, last - 5)
        self.assertLessEqual(art_num, last)
        self._check_art_dict(art_dict)

@unittest.skipIf(True, 'temporarily skipped until a permanent solution'
                           ' is found for issue #28971')
    def test_over(self):
        resp, count, first, last, name = self.server.group(self.GROUP_NAME)
        start = last - 10
        # The "start-" article range form
        resp, lines = self.server.over((start, None))
        art_num, art_dict = lines[0]
        self._check_art_dict(art_dict)
        # The "start-end" article range form
        resp, lines = self.server.over((start, last))
        art_num, art_dict = lines[-1]
        # The 'last' article is not necessarily part of the output (cancelled?)
        self.assertGreaterEqual(art_num, start)
        self.assertLessEqual(art_num, last)
        self._check_art_dict(art_dict)
        # XXX The "message_id" form is unsupported by gmane
        # 503 Overview by message-ID unsupported

def test_xhdr(self):
        resp, count, first, last, name = self.server.group(self.GROUP_NAME)
        resp, lines = self.server.xhdr('subject', last)
        for line in lines:
            self.assertEqual(str, type(line[1]))

def check_article_resp(self, resp, article, art_num=None):
        self.assertIsInstance(article, nntplib.ArticleInfo)
        if art_num is not None:
            self.assertEqual(article.number, art_num)
        for line in article.lines:
            self.assertIsInstance(line, bytes)
        # XXX this could exceptionally happen...
        self.assertNotIn(article.lines[-1], (b".", b".\n", b".\r\n"))

@unittest.skipIf(True, "FIXME: see bpo-32128")
    def test_article_head_body(self):
        resp, count, first, last, name = self.server.group(self.GROUP_NAME)
        # Try to find an available article
        for art_num in (last, first, last - 1):
            try:
                resp, head = self.server.head(art_num)
            except nntplib.NNTPTemporaryError as e:
                if not e.response.startswith("423 "):
                    raise
                # "423 No such article" => choose another one
                continue
            break
        else:
            self.skipTest("could not find a suitable article number")
        self.assertTrue(resp.startswith("221 "), resp)
        self.check_article_resp(resp, head, art_num)
        resp, body = self.server.body(art_num)
        self.assertTrue(resp.startswith("222 "), resp)
        self.check_article_resp(resp, body, art_num)
        resp, article = self.server.article(art_num)
        self.assertTrue(resp.startswith("220 "), resp)
        self.check_article_resp(resp, article, art_num)
        # Tolerate running the tests from behind a NNTP virus checker
        denylist = lambda line: line.startswith(b'X-Antivirus')
        filtered_head_lines = [line for line in head.lines
                               if not denylist(line)]
        filtered_lines = [line for line in article.lines
                          if not denylist(line)]
        self.assertEqual(filtered_lines, filtered_head_lines + [b''] + body.lines)

def test_capabilities(self):
        # The server under test implements NNTP version 2 and has a
        # couple of well-known capabilities. Just sanity check that we
        # got them.
        def _check_caps(caps):
            caps_list = caps['LIST']
            self.assertIsInstance(caps_list, (list, tuple))
            self.assertIn('OVERVIEW.FMT', caps_list)
        self.assertGreaterEqual(self.server.nntp_version, 2)
        _check_caps(self.server.getcapabilities())
        # This re-emits the command
        resp, caps = self.server.capabilities()
        _check_caps(caps)

def test_zlogin(self):
        # This test must be the penultimate because further commands will be
        # refused.
        baduser = "notarealuser"
        badpw = "notarealpassword"
        # Check that bogus credentials cause failure
        self.assertRaises(nntplib.NNTPError, self.server.login,
                          user=baduser, password=badpw, usenetrc=False)
        # FIXME: We should check that correct credentials succeed, but that
        # would require valid details for some server somewhere to be in the
        # test suite, I think. Gmane is anonymous, at least as used for the
        # other tests.

def test_zzquit(self):
        # This test must be called last, hence the name
        cls = type(self)
        try:
            self.server.quit()
        finally:
            cls.server = None

@classmethod
    def wrap_methods(cls):
        # Wrap all methods in a transient_internet() exception catcher
        # XXX put a generic version in test.support?
        def wrap_meth(meth):
            @functools.wraps(meth)
            def wrapped(self):
                with socket_helper.transient_internet(self.NNTP_HOST):
                    meth(self)
            return wrapped
        for name in dir(cls):
            if not name.startswith('test_'):
                continue
            meth = getattr(cls, name)
            if not callable(meth):
                continue
            # Need to use a closure so that meth remains bound to its current
            # value
            setattr(cls, name, wrap_meth(meth))

def test_timeout(self):
        with self.assertRaises(ValueError):
            self.NNTP_CLASS(self.NNTP_HOST, timeout=0, usenetrc=False)

def test_with_statement(self):
        def is_connected():
            if not hasattr(server, 'file'):
                return False
            try:
                server.help()
            except (OSError, EOFError):
                return False
            return True

kwargs = dict(
            timeout=support.INTERNET_TIMEOUT,
            usenetrc=False
        )
        if self.ssl_context is not None:
            kwargs["ssl_context"] = self.ssl_context

try:
            server = self.NNTP_CLASS(self.NNTP_HOST, **kwargs)
            with server:
                self.assertTrue(is_connected())
                self.assertTrue(server.help())
            self.assertFalse(is_connected())

server = self.NNTP_CLASS(self.NNTP_HOST, **kwargs)
            with server:
                server.quit()
            self.assertFalse(is_connected())
        except SSLError as ssl_err:
            # matches "[SSL: DH_KEY_TOO_SMALL] dh key too small"
            if re.search(r'(?i)KEY.TOO.SMALL', ssl_err.reason):
                raise unittest.SkipTest(f"Got {ssl_err} connecting "
                                        f"to {self.NNTP_HOST!r}")
            raise

NetworkedNNTPTestsMixin.wrap_methods()

EOF_ERRORS = (EOFError,)
if ssl is not None:
    EOF_ERRORS += (ssl.SSLEOFError,)

class NetworkedNNTPTests(NetworkedNNTPTestsMixin, unittest.TestCase):
    # This server supports STARTTLS (gmane doesn't)
    NNTP_HOST = 'news.trigofacile.com'
    GROUP_NAME = 'fr.comp.lang.python'
    GROUP_PAT = 'fr.comp.lang.*'
    DESC = 'Python'

NNTP_CLASS = NNTP

@classmethod
    def setUpClass(cls):
        support.requires("network")
        kwargs = dict(
            timeout=support.INTERNET_TIMEOUT,
            usenetrc=False
        )
        if cls.ssl_context is not None:
            kwargs["ssl_context"] = cls.ssl_context
        with socket_helper.transient_internet(cls.NNTP_HOST):
            try:
                cls.server = cls.NNTP_CLASS(cls.NNTP_HOST, **kwargs)
            except SSLError as ssl_err:
                # matches "[SSL: DH_KEY_TOO_SMALL] dh key too small"
                if re.search(r'(?i)KEY.TOO.SMALL', ssl_err.reason):
                    raise unittest.SkipTest(f"{cls} got {ssl_err} connecting "
                                            f"to {cls.NNTP_HOST!r}")
                print(cls.NNTP_HOST)
                raise
            except EOF_ERRORS:
                raise unittest.SkipTest(f"{cls} got EOF error on connecting "
                                        f"to {cls.NNTP_HOST!r}")

@classmethod
    def tearDownClass(cls):
        if cls.server is not None:
            cls.server.quit()

@unittest.skipUnless(ssl, 'requires SSL support')
class NetworkedNNTP_SSLTests(NetworkedNNTPTests):

# Technical limits for this public NNTP server (see http://www.aioe.org):
    # "Only two concurrent connections per IP address are allowed and
    # 400 connections per day are accepted from each IP address."

NNTP_HOST = 'nntp.aioe.org'
    # bpo-42794: aioe.test is one of the official groups on this server
    # used for testing: https://news.aioe.org/manual/aioe-hierarchy/
    GROUP_NAME = 'aioe.test'
    GROUP_PAT = 'aioe.*'
    DESC = 'test'

NNTP_CLASS = getattr(nntplib, 'NNTP_SSL', None)

# Disabled as it produces too much data
    test_list = None

# Disabled as the connection will already be encrypted.
    test_starttls = None

if ssl is not None:
        ssl_context = ssl._create_unverified_context()
        ssl_context.set_ciphers("DEFAULT")
        ssl_context.maximum_version = ssl.TLSVersion.TLSv1_2

#
# Non-networked tests using a local server (or something mocking it).
#

class _NNTPServerIO(io.RawIOBase):
    """A raw IO object allowing NNTP commands to be received and processed
    by a handler.  The handler can push responses which can then be read
    from the IO object."""

def __init__(self, handler):
        io.RawIOBase.__init__(self)
        # The channel from the client
        self.c2s = io.BytesIO()
        # The channel to the client
        self.s2c = io.BytesIO()
        self.handler = handler
        self.handler.start(self.c2s.readline, self.push_data)

def readable(self):
        return True

def writable(self):
        return True

def push_data(self, data):
        """Push (buffer) some data to send to the client."""
        pos = self.s2c.tell()
        self.s2c.seek(0, 2)
        self.s2c.write(data)
        self.s2c.seek(pos)

def write(self, b):
        """The client sends us some data"""
        pos = self.c2s.tell()
        self.c2s.write(b)
        self.c2s.seek(pos)
        self.handler.process_pending()
        return len(b)

def readinto(self, buf):
        """The client wants to read a response"""
        self.handler.process_pending()
        b = self.s2c.read(len(buf))
        n = len(b)
        buf[:n] = b
        return n

def make_mock_file(handler):
    sio = _NNTPServerIO(handler)
    # Using BufferedRWPair instead of BufferedRandom ensures the file
    # isn't seekable.
    file = io.BufferedRWPair(sio, sio)
    return (sio, file)

class NNTPServer(nntplib.NNTP):

def __init__(self, f, host, readermode=None):
        self.file = f
        self.host = host
        self._base_init(readermode)

def _close(self):
        self.file.close()
        del self.file

class MockedNNTPTestsMixin:
    # Override in derived classes
    handler_class = None

def setUp(self):
        super().setUp()
        self.make_server()

def tearDown(self):
        super().tearDown()
        del self.server

def make_server(self, *args, **kwargs):
        self.handler = self.handler_class()
        self.sio, file = make_mock_file(self.handler)
        self.server = NNTPServer(file, 'test.server', *args, **kwargs)
        return self.server

class MockedNNTPWithReaderModeMixin(MockedNNTPTestsMixin):
    def setUp(self):
        super().setUp()
        self.make_server(readermode=True)

class NNTPv1Handler:
    """A handler for RFC 977"""

welcome = "200 NNTP mock server"

def start(self, readline, push_data):
        self.in_body = False
        self.allow_posting = True
        self._readline = readline
        self._push_data = push_data
        self._logged_in = False
        self._user_sent = False
        # Our welcome
        self.handle_welcome()

def _decode(self, data):
        return str(data, "utf-8", "surrogateescape")

def process_pending(self):
        if self.in_body:
            while True:
                line = self._readline()
                if not line:
                    return
                self.body.append(line)
                if line == b".\r\n":
                    break
            try:
                meth, tokens = self.body_callback
                meth(*tokens, body=self.body)
            finally:
                self.body_callback = None
                self.body = None
                self.in_body = False
        while True:
            line = self._decode(self._readline())
            if not line:
                return
            if not line.endswith("\r\n"):
                raise ValueError("line doesn't end with \\r\\n: {!r}".format(line))
            line = line[:-2]
            cmd, *tokens = line.split()
            #meth = getattr(self.handler, "handle_" + cmd.upper(), None)
            meth = getattr(self, "handle_" + cmd.upper(), None)
            if meth is None:
                self.handle_unknown()
            else:
                try:
                    meth(*tokens)
                except Exception as e:
                    raise ValueError("command failed: {!r}".format(line)) from e
                else:
                    if self.in_body:
                        self.body_callback = meth, tokens
                        self.body = []

def expect_body(self):
        """Flag that the client is expected to post a request body"""
        self.in_body = True

def push_data(self, data):
        """Push some binary data"""
        self._push_data(data)

def push_lit(self, lit):
        """Push a string literal"""
        lit = textwrap.dedent(lit)
        lit = "\r\n".join(lit.splitlines()) + "\r\n"
        lit = lit.encode('utf-8')
        self.push_data(lit)

def handle_unknown(self):
        self.push_lit("500 What?")

def handle_welcome(self):
        self.push_lit(self.welcome)

def handle_QUIT(self):
        self.push_lit("205 Bye!")

def handle_DATE(self):
        self.push_lit("111 20100914001155")

def handle_GROUP(self, group):
        if group == "fr.comp.lang.python":
            self.push_lit("211 486 761 1265 fr.comp.lang.python")
        else:
            self.push_lit("411 No such group {}".format(group))

def handle_HELP(self):
        self.push_lit("""\
            100 Legal commands
              authinfo user Name|pass Password|generic <prog> <args>
              date
              help
            Report problems to <root@example.org>
            .""")

def handle_STAT(self, message_spec=None):
        if message_spec is None:
            self.push_lit("412 No newsgroup selected")
        elif message_spec == "3000234":
            self.push_lit("223 3000234 <45223423@example.com>")
        elif message_spec == "<45223423@example.com>":
            self.push_lit("223 0 <45223423@example.com>")
        else:
            self.push_lit("430 No Such Article Found")

def handle_NEXT(self):
        self.push_lit("223 3000237 <668929@example.org> retrieved")

def handle_LAST(self):
        self.push_lit("223 3000234 <45223423@example.com> retrieved")

def handle_LIST(self, action=None, param=None):
        if action is None:
            self.push_lit("""\
                215 Newsgroups in form "group high low flags".
                comp.lang.python 0000052340 0000002828 y
                comp.lang.python.announce 0000001153 0000000993 m
                free.it.comp.lang.python 0000000002 0000000002 y
                fr.comp.lang.python 0000001254 0000000760 y
                free.it.comp.lang.python.learner 0000000000 0000000001 y
                tw.bbs.comp.lang.python 0000000304 0000000304 y
                .""")
        elif action == "ACTIVE":
            if param == "*distutils*":
                self.push_lit("""\
                    215 Newsgroups in form "group high low flags"
                    gmane.comp.python.distutils.devel 0000014104 0000000001 m
                    gmane.comp.python.distutils.cvs 0000000000 0000000001 m
                    .""")
            else:
                self.push_lit("""\
                    215 Newsgroups in form "group high low flags"
                    .""")
        elif action == "OVERVIEW.FMT":
            self.push_lit("""\
                215 Order of fields in overview database.
                Subject:
                From:
                Date:
                Message-ID:
                References:
                Bytes:
                Lines:
                Xref:full
                .""")
        elif action == "NEWSGROUPS":
            assert param is not None
            if param == "comp.lang.python":
                self.push_lit("""\
                    215 Descriptions in form "group description".
                    comp.lang.python\tThe Python computer language.
                    .""")
            elif param == "comp.lang.python*":
                self.push_lit("""\
                    215 Descriptions in form "group description".
                    comp.lang.python.announce\tAnnouncements about the Python language. (Moderated)
                    comp.lang.python\tThe Python computer language.
                    .""")
            else:
                self.push_lit("""\
                    215 Descriptions in form "group description".
                    .""")
        else:
            self.push_lit('501 Unknown LIST keyword')

def handle_NEWNEWS(self, group, date_str, time_str):
        # We hard code different return messages depending on passed
        # argument and date syntax.
        if (group == "comp.lang.python" and date_str == "20100913"
            and time_str == "082004"):
            # Date was passed in RFC 3977 format (NNTP "v2")
            self.push_lit("""\
                230 list of newsarticles (NNTP v2) created after Mon Sep 13 08:20:04 2010 follows
                <a4929a40-6328-491a-aaaf-cb79ed7309a2@q2g2000vbk.googlegroups.com>
                <f30c0419-f549-4218-848f-d7d0131da931@y3g2000vbm.googlegroups.com>
                .""")
        elif (group == "comp.lang.python" and date_str == "100913"
            and time_str == "082004"):
            # Date was passed in RFC 977 format (NNTP "v1")
            self.push_lit("""\
                230 list of newsarticles (NNTP v1) created after Mon Sep 13 08:20:04 2010 follows
                <a4929a40-6328-491a-aaaf-cb79ed7309a2@q2g2000vbk.googlegroups.com>
                <f30c0419-f549-4218-848f-d7d0131da931@y3g2000vbm.googlegroups.com>
                .""")
        elif (group == 'comp.lang.python' and
              date_str in ('20100101', '100101') and
              time_str == '090000'):
            self.push_lit('too long line' * 3000 +
                          '\n.')
        else:
            self.push_lit("""\
                230 An empty list of newsarticles follows
                .""")
        # (Note for experiments: many servers disable NEWNEWS.
        #  As of this writing, sicinfo3.epfl.ch doesn't.)

def handle_XOVER(self, message_spec):
        if message_spec == "57-59":
            self.push_lit(
                "224 Overview information for 57-58 follows\n"
                "57\tRe: ANN: New Plone book with strong Python (and Zope) themes throughout"
                    "\tDoug Hellmann <doug.hellmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>"
                    "\tSat, 19 Jun 2010 18:04:08 -0400"
                    "\t<4FD05F05-F98B-44DC-8111-C6009C925F0C@gmail.com>"
                    "\t<hvalf7$ort$1@dough.gmane.org>\t7103\t16"
                    "\tXref: news.gmane.io gmane.comp.python.authors:57"
                    "\n"
                "58\tLooking for a few good bloggers"
                    "\tDoug Hellmann <doug.hellmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>"
                    "\tThu, 22 Jul 2010 09:14:14 -0400"
                    "\t<A29863FA-F388-40C3-AA25-0FD06B09B5BF@gmail.com>"
                    "\t\t6683\t16"
                    "\t"
                    "\n"
                # A UTF-8 overview line from fr.comp.lang.python
                "59\tRe: Message d'erreur incompréhensible (par moi)"
                    "\tEric Brunel <eric.brunel@pragmadev.nospam.com>"
                    "\tWed, 15 Sep 2010 18:09:15 +0200"
                    "\t<eric.brunel-2B8B56.18091515092010@news.wanadoo.fr>"
                    "\t<4c90ec87$0$32425$ba4acef3@reader.news.orange.fr>\t1641\t27"
                    "\tXref: saria.nerim.net fr.comp.lang.python:1265"
                    "\n"
                ".\n")
        else:
            self.push_lit("""\
                224 No articles
                .""")

def handle_POST(self, *, body=None):
        if body is None:
            if self.allow_posting:
                self.push_lit("340 Input article; end with <CR-LF>.<CR-LF>")
                self.expect_body()
            else:
                self.push_lit("440 Posting not permitted")
        else:
            assert self.allow_posting
            self.push_lit("240 Article received OK")
            self.posted_body = body

def handle_IHAVE(self, message_id, *, body=None):
        if body is None:
            if (self.allow_posting and
                message_id == "<i.am.an.article.you.will.want@example.com>"):
                self.push_lit("335 Send it; end with <CR-LF>.<CR-LF>")
                self.expect_body()
            else:
                self.push_lit("435 Article not wanted")
        else:
            assert self.allow_posting
            self.push_lit("235 Article transferred OK")
            self.posted_body = body

sample_head = """\
        From: "Demo User" <nobody@example.net>
        Subject: I am just a test article
        Content-Type: text/plain; charset=UTF-8; format=flowed
        Message-ID: <i.am.an.article.you.will.want@example.com>"""

sample_body = """\
        This is just a test article.
        ..Here is a dot-starting line.

-- Signed by Andr\xe9."""

sample_article = sample_head + "\n\n" + sample_body

def handle_ARTICLE(self, message_spec=None):
        if message_spec is None:
            self.push_lit("220 3000237 <45223423@example.com>")
        elif message_spec == "<45223423@example.com>":
            self.push_lit("220 0 <45223423@example.com>")
        elif message_spec == "3000234":
            self.push_lit("220 3000234 <45223423@example.com>")
        else:
            self.push_lit("430 No Such Article Found")
            return
        self.push_lit(self.sample_article)
        self.push_lit(".")

def handle_HEAD(self, message_spec=None):
        if message_spec is None:
            self.push_lit("221 3000237 <45223423@example.com>")
        elif message_spec == "<45223423@example.com>":
            self.push_lit("221 0 <45223423@example.com>")
        elif message_spec == "3000234":
            self.push_lit("221 3000234 <45223423@example.com>")
        else:
            self.push_lit("430 No Such Article Found")
            return
        self.push_lit(self.sample_head)
        self.push_lit(".")

def handle_BODY(self, message_spec=None):
        if message_spec is None:
            self.push_lit("222 3000237 <45223423@example.com>")
        elif message_spec == "<45223423@example.com>":
            self.push_lit("222 0 <45223423@example.com>")
        elif message_spec == "3000234":
            self.push_lit("222 3000234 <45223423@example.com>")
        else:
            self.push_lit("430 No Such Article Found")
            return
        self.push_lit(self.sample_body)
        self.push_lit(".")

def handle_AUTHINFO(self, cred_type, data):
        if self._logged_in:
            self.push_lit('502 Already Logged In')
        elif cred_type == 'user':
            if self._user_sent:
                self.push_lit('482 User Credential Already Sent')
            else:
                self.push_lit('381 Password Required')
                self._user_sent = True
        elif cred_type == 'pass':
            self.push_lit('281 Login Successful')
            self._logged_in = True
        else:
            raise Exception('Unknown cred type {}'.format(cred_type))

class NNTPv2Handler(NNTPv1Handler):
    """A handler for RFC 3977 (NNTP "v2")"""

def handle_CAPABILITIES(self):
        fmt = """\
            101 Capability list:
            VERSION 2 3
            IMPLEMENTATION INN 2.5.1{}
            HDR
            LIST ACTIVE ACTIVE.TIMES DISTRIB.PATS HEADERS NEWSGROUPS OVERVIEW.FMT
            OVER
            POST
            READER
            ."""

if not self._logged_in:
            self.push_lit(fmt.format('\n            AUTHINFO USER'))
        else:
            self.push_lit(fmt.format(''))

def handle_MODE(self, _):
        raise Exception('MODE READER sent despite READER has been advertised')

def handle_OVER(self, message_spec=None):
        return self.handle_XOVER(message_spec)

class CapsAfterLoginNNTPv2Handler(NNTPv2Handler):
    """A handler that allows CAPABILITIES only after login"""

def handle_CAPABILITIES(self):
        if not self._logged_in:
            self.push_lit('480 You must log in.')
        else:
            super().handle_CAPABILITIES()

class ModeSwitchingNNTPv2Handler(NNTPv2Handler):
    """A server that starts in transit mode"""

def __init__(self):
        self._switched = False

def handle_CAPABILITIES(self):
        fmt = """\
            101 Capability list:
            VERSION 2 3
            IMPLEMENTATION INN 2.5.1
            HDR
            LIST ACTIVE ACTIVE.TIMES DISTRIB.PATS HEADERS NEWSGROUPS OVERVIEW.FMT
            OVER
            POST
            {}READER
            ."""
        if self._switched:
            self.push_lit(fmt.format(''))
        else:
            self.push_lit(fmt.format('MODE-'))

def handle_MODE(self, what):
        assert not self._switched and what == 'reader'
        self._switched = True
        self.push_lit('200 Posting allowed')

class NNTPv1v2TestsMixin:

def setUp(self):
        super().setUp()

def test_welcome(self):
        self.assertEqual(self.server.welcome, self.handler.welcome)

def test_authinfo(self):
        if self.nntp_version == 2:
            self.assertIn('AUTHINFO', self.server._caps)
        self.server.login('testuser', 'testpw')
        # if AUTHINFO is gone from _caps we also know that getcapabilities()
        # has been called after login as it should
        self.assertNotIn('AUTHINFO', self.server._caps)

def test_date(self):
        resp, date = self.server.date()
        self.assertEqual(resp, "111 20100914001155")
        self.assertEqual(date, datetime.datetime(2010, 9, 14, 0, 11, 55))

def test_quit(self):
        self.assertFalse(self.sio.closed)
        resp = self.server.quit()
        self.assertEqual(resp, "205 Bye!")
        self.assertTrue(self.sio.closed)

def test_help(self):
        resp, help = self.server.help()
        self.assertEqual(resp, "100 Legal commands")
        self.assertEqual(help, [
            '  authinfo user Name|pass Password|generic <prog> <args>',
            '  date',
            '  help',
            'Report problems to <root@example.org>',
        ])

def test_list(self):
        resp, groups = self.server.list()
        self.assertEqual(len(groups), 6)
        g = groups[1]
        self.assertEqual(g,
            GroupInfo("comp.lang.python.announce", "0000001153",
                      "0000000993", "m"))
        resp, groups = self.server.list("*distutils*")
        self.assertEqual(len(groups), 2)
        g = groups[0]
        self.assertEqual(g,
            GroupInfo("gmane.comp.python.distutils.devel", "0000014104",
                      "0000000001", "m"))

def test_stat(self):
        resp, art_num, message_id = self.server.stat(3000234)
        self.assertEqual(resp, "223 3000234 <45223423@example.com>")
        self.assertEqual(art_num, 3000234)
        self.assertEqual(message_id, "<45223423@example.com>")
        resp, art_num, message_id = self.server.stat("<45223423@example.com>")
        self.assertEqual(resp, "223 0 <45223423@example.com>")
        self.assertEqual(art_num, 0)
        self.assertEqual(message_id, "<45223423@example.com>")
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.stat("<non.existent.id>")
        self.assertEqual(cm.exception.response, "430 No Such Article Found")
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.stat()
        self.assertEqual(cm.exception.response, "412 No newsgroup selected")

def test_next(self):
        resp, art_num, message_id = self.server.next()
        self.assertEqual(resp, "223 3000237 <668929@example.org> retrieved")
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<668929@example.org>")

def test_last(self):
        resp, art_num, message_id = self.server.last()
        self.assertEqual(resp, "223 3000234 <45223423@example.com> retrieved")
        self.assertEqual(art_num, 3000234)
        self.assertEqual(message_id, "<45223423@example.com>")

def test_description(self):
        desc = self.server.description("comp.lang.python")
        self.assertEqual(desc, "The Python computer language.")
        desc = self.server.description("comp.lang.pythonx")
        self.assertEqual(desc, "")

def test_descriptions(self):
        resp, groups = self.server.descriptions("comp.lang.python")
        self.assertEqual(resp, '215 Descriptions in form "group description".')
        self.assertEqual(groups, {
            "comp.lang.python": "The Python computer language.",
            })
        resp, groups = self.server.descriptions("comp.lang.python*")
        self.assertEqual(groups, {
            "comp.lang.python": "The Python computer language.",
            "comp.lang.python.announce": "Announcements about the Python language. (Moderated)",
            })
        resp, groups = self.server.descriptions("comp.lang.pythonx")
        self.assertEqual(groups, {})

def test_group(self):
        resp, count, first, last, group = self.server.group("fr.comp.lang.python")
        self.assertTrue(resp.startswith("211 "), resp)
        self.assertEqual(first, 761)
        self.assertEqual(last, 1265)
        self.assertEqual(count, 486)
        self.assertEqual(group, "fr.comp.lang.python")
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.group("comp.lang.python.devel")
        exc = cm.exception
        self.assertTrue(exc.response.startswith("411 No such group"),
                        exc.response)

def test_newnews(self):
        # NEWNEWS comp.lang.python [20]100913 082004
        dt = datetime.datetime(2010, 9, 13, 8, 20, 4)
        resp, ids = self.server.newnews("comp.lang.python", dt)
        expected = (
            "230 list of newsarticles (NNTP v{0}) "
            "created after Mon Sep 13 08:20:04 2010 follows"
            ).format(self.nntp_version)
        self.assertEqual(resp, expected)
        self.assertEqual(ids, [
            "<a4929a40-6328-491a-aaaf-cb79ed7309a2@q2g2000vbk.googlegroups.com>",
            "<f30c0419-f549-4218-848f-d7d0131da931@y3g2000vbm.googlegroups.com>",
            ])
        # NEWNEWS fr.comp.lang.python [20]100913 082004
        dt = datetime.datetime(2010, 9, 13, 8, 20, 4)
        resp, ids = self.server.newnews("fr.comp.lang.python", dt)
        self.assertEqual(resp, "230 An empty list of newsarticles follows")
        self.assertEqual(ids, [])

def _check_article_body(self, lines):
        self.assertEqual(len(lines), 4)
        self.assertEqual(lines[-1].decode('utf-8'), "-- Signed by André.")
        self.assertEqual(lines[-2], b"")
        self.assertEqual(lines[-3], b".Here is a dot-starting line.")
        self.assertEqual(lines[-4], b"This is just a test article.")

def _check_article_head(self, lines):
        self.assertEqual(len(lines), 4)
        self.assertEqual(lines[0], b'From: "Demo User" <nobody@example.net>')
        self.assertEqual(lines[3], b"Message-ID: <i.am.an.article.you.will.want@example.com>")

def _check_article_data(self, lines):
        self.assertEqual(len(lines), 9)
        self._check_article_head(lines[:4])
        self._check_article_body(lines[-4:])
        self.assertEqual(lines[4], b"")

def test_article(self):
        # ARTICLE
        resp, info = self.server.article()
        self.assertEqual(resp, "220 3000237 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_data(lines)
        # ARTICLE num
        resp, info = self.server.article(3000234)
        self.assertEqual(resp, "220 3000234 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000234)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_data(lines)
        # ARTICLE id
        resp, info = self.server.article("<45223423@example.com>")
        self.assertEqual(resp, "220 0 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 0)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_data(lines)
        # Non-existent id
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.article("<non-existent@example.com>")
        self.assertEqual(cm.exception.response, "430 No Such Article Found")

def test_article_file(self):
        # With a "file" argument
        f = io.BytesIO()
        resp, info = self.server.article(file=f)
        self.assertEqual(resp, "220 3000237 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<45223423@example.com>")
        self.assertEqual(lines, [])
        data = f.getvalue()
        self.assertTrue(data.startswith(
            b'From: "Demo User" <nobody@example.net>\r\n'
            b'Subject: I am just a test article\r\n'
            ), ascii(data))
        self.assertTrue(data.endswith(
            b'This is just a test article.\r\n'
            b'.Here is a dot-starting line.\r\n'
            b'\r\n'
            b'-- Signed by Andr\xc3\xa9.\r\n'
            ), ascii(data))

def test_head(self):
        # HEAD
        resp, info = self.server.head()
        self.assertEqual(resp, "221 3000237 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_head(lines)
        # HEAD num
        resp, info = self.server.head(3000234)
        self.assertEqual(resp, "221 3000234 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000234)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_head(lines)
        # HEAD id
        resp, info = self.server.head("<45223423@example.com>")
        self.assertEqual(resp, "221 0 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 0)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_head(lines)
        # Non-existent id
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.head("<non-existent@example.com>")
        self.assertEqual(cm.exception.response, "430 No Such Article Found")

def test_head_file(self):
        f = io.BytesIO()
        resp, info = self.server.head(file=f)
        self.assertEqual(resp, "221 3000237 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<45223423@example.com>")
        self.assertEqual(lines, [])
        data = f.getvalue()
        self.assertTrue(data.startswith(
            b'From: "Demo User" <nobody@example.net>\r\n'
            b'Subject: I am just a test article\r\n'
            ), ascii(data))
        self.assertFalse(data.endswith(
            b'This is just a test article.\r\n'
            b'.Here is a dot-starting line.\r\n'
            b'\r\n'
            b'-- Signed by Andr\xc3\xa9.\r\n'
            ), ascii(data))

def test_body(self):
        # BODY
        resp, info = self.server.body()
        self.assertEqual(resp, "222 3000237 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_body(lines)
        # BODY num
        resp, info = self.server.body(3000234)
        self.assertEqual(resp, "222 3000234 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000234)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_body(lines)
        # BODY id
        resp, info = self.server.body("<45223423@example.com>")
        self.assertEqual(resp, "222 0 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 0)
        self.assertEqual(message_id, "<45223423@example.com>")
        self._check_article_body(lines)
        # Non-existent id
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.body("<non-existent@example.com>")
        self.assertEqual(cm.exception.response, "430 No Such Article Found")

def test_body_file(self):
        f = io.BytesIO()
        resp, info = self.server.body(file=f)
        self.assertEqual(resp, "222 3000237 <45223423@example.com>")
        art_num, message_id, lines = info
        self.assertEqual(art_num, 3000237)
        self.assertEqual(message_id, "<45223423@example.com>")
        self.assertEqual(lines, [])
        data = f.getvalue()
        self.assertFalse(data.startswith(
            b'From: "Demo User" <nobody@example.net>\r\n'
            b'Subject: I am just a test article\r\n'
            ), ascii(data))
        self.assertTrue(data.endswith(
            b'This is just a test article.\r\n'
            b'.Here is a dot-starting line.\r\n'
            b'\r\n'
            b'-- Signed by Andr\xc3\xa9.\r\n'
            ), ascii(data))

def check_over_xover_resp(self, resp, overviews):
        self.assertTrue(resp.startswith("224 "), resp)
        self.assertEqual(len(overviews), 3)
        art_num, over = overviews[0]
        self.assertEqual(art_num, 57)
        self.assertEqual(over, {
            "from": "Doug Hellmann <doug.hellmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>",
            "subject": "Re: ANN: New Plone book with strong Python (and Zope) themes throughout",
            "date": "Sat, 19 Jun 2010 18:04:08 -0400",
            "message-id": "<4FD05F05-F98B-44DC-8111-C6009C925F0C@gmail.com>",
            "references": "<hvalf7$ort$1@dough.gmane.org>",
            ":bytes": "7103",
            ":lines": "16",
            "xref": "news.gmane.io gmane.comp.python.authors:57"
            })
        art_num, over = overviews[1]
        self.assertEqual(over["xref"], None)
        art_num, over = overviews[2]
        self.assertEqual(over["subject"],
                         "Re: Message d'erreur incompréhensible (par moi)")

def test_xover(self):
        resp, overviews = self.server.xover(57, 59)
        self.check_over_xover_resp(resp, overviews)

def test_over(self):
        # In NNTP "v1", this will fallback on XOVER
        resp, overviews = self.server.over((57, 59))
        self.check_over_xover_resp(resp, overviews)

sample_post = (
        b'From: "Demo User" <nobody@example.net>\r\n'
        b'Subject: I am just a test article\r\n'
        b'Content-Type: text/plain; charset=UTF-8; format=flowed\r\n'
        b'Message-ID: <i.am.an.article.you.will.want@example.com>\r\n'
        b'\r\n'
        b'This is just a test article.\r\n'
        b'.Here is a dot-starting line.\r\n'
        b'\r\n'
        b'-- Signed by Andr\xc3\xa9.\r\n'
    )

def _check_posted_body(self):
        # Check the raw body as received by the server
        lines = self.handler.posted_body
        # One additional line for the "." terminator
        self.assertEqual(len(lines), 10)
        self.assertEqual(lines[-1], b'.\r\n')
        self.assertEqual(lines[-2], b'-- Signed by Andr\xc3\xa9.\r\n')
        self.assertEqual(lines[-3], b'\r\n')
        self.assertEqual(lines[-4], b'..Here is a dot-starting line.\r\n')
        self.assertEqual(lines[0], b'From: "Demo User" <nobody@example.net>\r\n')

def _check_post_ihave_sub(self, func, *args, file_factory):
        # First the prepared post with CRLF endings
        post = self.sample_post
        func_args = args + (file_factory(post),)
        self.handler.posted_body = None
        resp = func(*func_args)
        self._check_posted_body()
        # Then the same post with "normal" line endings - they should be
        # converted by NNTP.post and NNTP.ihave.
        post = self.sample_post.replace(b"\r\n", b"\n")
        func_args = args + (file_factory(post),)
        self.handler.posted_body = None
        resp = func(*func_args)
        self._check_posted_body()
        return resp

def check_post_ihave(self, func, success_resp, *args):
        # With a bytes object
        resp = self._check_post_ihave_sub(func, *args, file_factory=bytes)
        self.assertEqual(resp, success_resp)
        # With a bytearray object
        resp = self._check_post_ihave_sub(func, *args, file_factory=bytearray)
        self.assertEqual(resp, success_resp)
        # With a file object
        resp = self._check_post_ihave_sub(func, *args, file_factory=io.BytesIO)
        self.assertEqual(resp, success_resp)
        # With an iterable of terminated lines
        def iterlines(b):
            return iter(b.splitlines(keepends=True))
        resp = self._check_post_ihave_sub(func, *args, file_factory=iterlines)
        self.assertEqual(resp, success_resp)
        # With an iterable of non-terminated lines
        def iterlines(b):
            return iter(b.splitlines(keepends=False))
        resp = self._check_post_ihave_sub(func, *args, file_factory=iterlines)
        self.assertEqual(resp, success_resp)

def test_post(self):
        self.check_post_ihave(self.server.post, "240 Article received OK")
        self.handler.allow_posting = False
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.post(self.sample_post)
        self.assertEqual(cm.exception.response,
                         "440 Posting not permitted")

def test_ihave(self):
        self.check_post_ihave(self.server.ihave, "235 Article transferred OK",
                              "<i.am.an.article.you.will.want@example.com>")
        with self.assertRaises(nntplib.NNTPTemporaryError) as cm:
            self.server.ihave("<another.message.id>", self.sample_post)
        self.assertEqual(cm.exception.response,
                         "435 Article not wanted")

def test_too_long_lines(self):
        dt = datetime.datetime(2010, 1, 1, 9, 0, 0)
        self.assertRaises(nntplib.NNTPDataError,
                          self.server.newnews, "comp.lang.python", dt)

class NNTPv1Tests(NNTPv1v2TestsMixin, MockedNNTPTestsMixin, unittest.TestCase):
    """Tests an NNTP v1 server (no capabilities)."""

nntp_version = 1
    handler_class = NNTPv1Handler

def test_caps(self):
        caps = self.server.getcapabilities()
        self.assertEqual(caps, {})
        self.assertEqual(self.server.nntp_version, 1)
        self.assertEqual(self.server.nntp_implementation, None)

class NNTPv2Tests(NNTPv1v2TestsMixin, MockedNNTPTestsMixin, unittest.TestCase):
    """Tests an NNTP v2 server (with capabilities)."""

nntp_version = 2
    handler_class = NNTPv2Handler

def test_caps(self):
        caps = self.server.getcapabilities()
        self.assertEqual(caps, {
            'VERSION': ['2', '3'],
            'IMPLEMENTATION': ['INN', '2.5.1'],
            'AUTHINFO': ['USER'],
            'HDR': [],
            'LIST': ['ACTIVE', 'ACTIVE.TIMES', 'DISTRIB.PATS',
                     'HEADERS', 'NEWSGROUPS', 'OVERVIEW.FMT'],
            'OVER': [],
            'POST': [],
            'READER': [],
            })
        self.assertEqual(self.server.nntp_version, 3)
        self.assertEqual(self.server.nntp_implementation, 'INN 2.5.1')

class CapsAfterLoginNNTPv2Tests(MockedNNTPTestsMixin, unittest.TestCase):
    """Tests a probably NNTP v2 server with capabilities only after login."""

nntp_version = 2
    handler_class = CapsAfterLoginNNTPv2Handler

def test_caps_only_after_login(self):
        self.assertEqual(self.server._caps, {})
        self.server.login('testuser', 'testpw')
        self.assertIn('VERSION', self.server._caps)

class SendReaderNNTPv2Tests(MockedNNTPWithReaderModeMixin,
        unittest.TestCase):
    """Same tests as for v2 but we tell NTTP to send MODE READER to a server
    that isn't in READER mode by default."""

nntp_version = 2
    handler_class = ModeSwitchingNNTPv2Handler

def test_we_are_in_reader_mode_after_connect(self):
        self.assertIn('READER', self.server._caps)

class MiscTests(unittest.TestCase):

def test_decode_header(self):
        def gives(a, b):
            self.assertEqual(nntplib.decode_header(a), b)
        gives("" , "")
        gives("a plain header", "a plain header")
        gives(" with extra  spaces ", " with extra  spaces ")
        gives("=?ISO-8859-15?Q?D=E9buter_en_Python?=", "Débuter en Python")
        gives("=?utf-8?q?Re=3A_=5Bsqlite=5D_probl=C3=A8me_avec_ORDER_BY_sur_des_cha?="
              " =?utf-8?q?=C3=AEnes_de_caract=C3=A8res_accentu=C3=A9es?=",
              "Re: [sqlite] problème avec ORDER BY sur des chaînes de caractères accentuées")
        gives("Re: =?UTF-8?B?cHJvYmzDqG1lIGRlIG1hdHJpY2U=?=",
              "Re: problème de matrice")
        # A natively utf-8 header (found in the real world!)
        gives("Re: Message d'erreur incompréhensible (par moi)",
              "Re: Message d'erreur incompréhensible (par moi)")

def test_parse_overview_fmt(self):
        # The minimal (default) response
        lines = ["Subject:", "From:", "Date:", "Message-ID:",
                 "References:", ":bytes", ":lines"]
        self.assertEqual(nntplib._parse_overview_fmt(lines),
            ["subject", "from", "date", "message-id", "references",
             ":bytes", ":lines"])
        # The minimal response using alternative names
        lines = ["Subject:", "From:", "Date:", "Message-ID:",
                 "References:", "Bytes:", "Lines:"]
        self.assertEqual(nntplib._parse_overview_fmt(lines),
            ["subject", "from", "date", "message-id", "references",
             ":bytes", ":lines"])
        # Variations in casing
        lines = ["subject:", "FROM:", "DaTe:", "message-ID:",
                 "References:", "BYTES:", "Lines:"]
        self.assertEqual(nntplib._parse_overview_fmt(lines),
            ["subject", "from", "date", "message-id", "references",
             ":bytes", ":lines"])
        # First example from RFC 3977
        lines = ["Subject:", "From:", "Date:", "Message-ID:",
                 "References:", ":bytes", ":lines", "Xref:full",
                 "Distribution:full"]
        self.assertEqual(nntplib._parse_overview_fmt(lines),
            ["subject", "from", "date", "message-id", "references",
             ":bytes", ":lines", "xref", "distribution"])
        # Second example from RFC 3977
        lines = ["Subject:", "From:", "Date:", "Message-ID:",
                 "References:", "Bytes:", "Lines:", "Xref:FULL",
                 "Distribution:FULL"]
        self.assertEqual(nntplib._parse_overview_fmt(lines),
            ["subject", "from", "date", "message-id", "references",
             ":bytes", ":lines", "xref", "distribution"])
        # A classic response from INN
        lines = ["Subject:", "From:", "Date:", "Message-ID:",
                 "References:", "Bytes:", "Lines:", "Xref:full"]
        self.assertEqual(nntplib._parse_overview_fmt(lines),
            ["subject", "from", "date", "message-id", "references",
             ":bytes", ":lines", "xref"])

def test_parse_overview(self):
        fmt = nntplib._DEFAULT_OVERVIEW_FMT + ["xref"]
        # First example from RFC 3977
        lines = [
            '3000234\tI am just a test article\t"Demo User" '
            '<nobody@example.com>\t6 Oct 1998 04:38:40 -0500\t'
            '<45223423@example.com>\t<45454@example.net>\t1234\t'
            '17\tXref: news.example.com misc.test:3000363',
        ]
        overview = nntplib._parse_overview(lines, fmt)
        (art_num, fields), = overview
        self.assertEqual(art_num, 3000234)
        self.assertEqual(fields, {
            'subject': 'I am just a test article',
            'from': '"Demo User" <nobody@example.com>',
            'date': '6 Oct 1998 04:38:40 -0500',
            'message-id': '<45223423@example.com>',
            'references': '<45454@example.net>',
            ':bytes': '1234',
            ':lines': '17',
            'xref': 'news.example.com misc.test:3000363',
        })
        # Second example; here the "Xref" field is totally absent (including
        # the header name) and comes out as None
        lines = [
            '3000234\tI am just a test article\t"Demo User" '
            '<nobody@example.com>\t6 Oct 1998 04:38:40 -0500\t'
            '<45223423@example.com>\t<45454@example.net>\t1234\t'
            '17\t\t',
        ]
        overview = nntplib._parse_overview(lines, fmt)
        (art_num, fields), = overview
        self.assertEqual(fields['xref'], None)
        # Third example; the "Xref" is an empty string, while "references"
        # is a single space.
        lines = [
            '3000234\tI am just a test article\t"Demo User" '
            '<nobody@example.com>\t6 Oct 1998 04:38:40 -0500\t'
            '<45223423@example.com>\t \t1234\t'
            '17\tXref: \t',
        ]
        overview = nntplib._parse_overview(lines, fmt)
        (art_num, fields), = overview
        self.assertEqual(fields['references'], ' ')
        self.assertEqual(fields['xref'], '')

def test_parse_datetime(self):
        def gives(a, b, *c):
            self.assertEqual(nntplib._parse_datetime(a, b),
                             datetime.datetime(*c))
        # Output of DATE command
        gives("19990623135624", None, 1999, 6, 23, 13, 56, 24)
        # Variations
        gives("19990623", "135624", 1999, 6, 23, 13, 56, 24)
        gives("990623", "135624", 1999, 6, 23, 13, 56, 24)
        gives("090623", "135624", 2009, 6, 23, 13, 56, 24)

def test_unparse_datetime(self):
        # Test non-legacy mode
        # 1) with a datetime
        def gives(y, M, d, h, m, s, date_str, time_str):
            dt = datetime.datetime(y, M, d, h, m, s)
            self.assertEqual(nntplib._unparse_datetime(dt),
                             (date_str, time_str))
            self.assertEqual(nntplib._unparse_datetime(dt, False),
                             (date_str, time_str))
        gives(1999, 6, 23, 13, 56, 24, "19990623", "135624")
        gives(2000, 6, 23, 13, 56, 24, "20000623", "135624")
        gives(2010, 6, 5, 1, 2, 3, "20100605", "010203")
        # 2) with a date
        def gives(y, M, d, date_str, time_str):
            dt = datetime.date(y, M, d)
            self.assertEqual(nntplib._unparse_datetime(dt),
                             (date_str, time_str))
            self.assertEqual(nntplib._unparse_datetime(dt, False),
                             (date_str, time_str))
        gives(1999, 6, 23, "19990623", "000000")
        gives(2000, 6, 23, "20000623", "000000")
        gives(2010, 6, 5, "20100605", "000000")

def test_unparse_datetime_legacy(self):
        # Test legacy mode (RFC 977)
        # 1) with a datetime
        def gives(y, M, d, h, m, s, date_str, time_str):
            dt = datetime.datetime(y, M, d, h, m, s)
            self.assertEqual(nntplib._unparse_datetime(dt, True),
                             (date_str, time_str))
        gives(1999, 6, 23, 13, 56, 24, "990623", "135624")
        gives(2000, 6, 23, 13, 56, 24, "000623", "135624")
        gives(2010, 6, 5, 1, 2, 3, "100605", "010203")
        # 2) with a date
        def gives(y, M, d, date_str, time_str):
            dt = datetime.date(y, M, d)
            self.assertEqual(nntplib._unparse_datetime(dt, True),
                             (date_str, time_str))
        gives(1999, 6, 23, "990623", "000000")
        gives(2000, 6, 23, "000623", "000000")
        gives(2010, 6, 5, "100605", "000000")

@unittest.skipUnless(ssl, 'requires SSL support')
    def test_ssl_support(self):
        self.assertTrue(hasattr(nntplib, 'NNTP_SSL'))

class PublicAPITests(unittest.TestCase):
    """Ensures that the correct values are exposed in the public API."""

def test_module_all_attribute(self):
        self.assertTrue(hasattr(nntplib, '__all__'))
        target_api = ['NNTP', 'NNTPError', 'NNTPReplyError',
                      'NNTPTemporaryError', 'NNTPPermanentError',
                      'NNTPProtocolError', 'NNTPDataError', 'decode_header']
        if ssl is not None:
            target_api.append('NNTP_SSL')
        self.assertEqual(set(nntplib.__all__), set(target_api))

class MockSocketTests(unittest.TestCase):
    """Tests involving a mock socket object

Used where the _NNTPServerIO file object is not enough."""

nntp_class = nntplib.NNTP

def check_constructor_error_conditions(
            self, handler_class,
            expected_error_type, expected_error_msg,
            login=None, password=None):

class mock_socket_module:
            def create_connection(address, timeout):
                return MockSocket()

class MockSocket:
            def close(self):
                nonlocal socket_closed
                socket_closed = True

def makefile(socket, mode):
                handler = handler_class()
                _, file = make_mock_file(handler)
                files.append(file)
                return file

socket_closed = False
        files = []
        with patch('nntplib.socket', mock_socket_module), \
             self.assertRaisesRegex(expected_error_type, expected_error_msg):
            self.nntp_class('dummy', user=login, password=password)
        self.assertTrue(socket_closed)
        for f in files:
            self.assertTrue(f.closed)

def test_bad_welcome(self):
        #Test a bad welcome message
        class Handler(NNTPv1Handler):
            welcome = 'Bad Welcome'
        self.check_constructor_error_conditions(
            Handler, nntplib.NNTPProtocolError, Handler.welcome)

def test_service_temporarily_unavailable(self):
        #Test service temporarily unavailable
        class Handler(NNTPv1Handler):
            welcome = '400 Service temporarily unavailable'
        self.check_constructor_error_conditions(
            Handler, nntplib.NNTPTemporaryError, Handler.welcome)

def test_service_permanently_unavailable(self):
        #Test service permanently unavailable
        class Handler(NNTPv1Handler):
            welcome = '502 Service permanently unavailable'
        self.check_constructor_error_conditions(
            Handler, nntplib.NNTPPermanentError, Handler.welcome)

def test_bad_capabilities(self):
        #Test a bad capabilities response
        class Handler(NNTPv1Handler):
            def handle_CAPABILITIES(self):
                self.push_lit(capabilities_response)
        capabilities_response = '201 bad capability'
        self.check_constructor_error_conditions(
            Handler, nntplib.NNTPReplyError, capabilities_response)

def test_login_aborted(self):
        #Test a bad authinfo response
        login = 't@e.com'
        password = 'python'
        class Handler(NNTPv1Handler):
            def handle_AUTHINFO(self, *args):
                self.push_lit(authinfo_response)
        authinfo_response = '503 Mechanism not recognized'
        self.check_constructor_error_conditions(
            Handler, nntplib.NNTPPermanentError, authinfo_response,
            login, password)

class bypass_context:
    """Bypass encryption and actual SSL module"""
    def wrap_socket(sock, **args):
        return sock

@unittest.skipUnless(ssl, 'requires SSL support')
class MockSslTests(MockSocketTests):
    @staticmethod
    def nntp_class(*pos, **kw):
        return nntplib.NNTP_SSL(*pos, ssl_context=bypass_context, **kw)

class LocalServerTests(unittest.TestCase):
    def setUp(self):
        sock = socket.socket()
        port = socket_helper.bind_port(sock)
        sock.listen()
        self.background = threading.Thread(
            target=self.run_server, args=(sock,))
        self.background.start()
        self.addCleanup(self.background.join)

self.nntp = self.enterContext(NNTP(socket_helper.HOST, port, usenetrc=False))

def run_server(self, sock):
        # Could be generalized to handle more commands in separate methods
        with sock:
            [client, _] = sock.accept()
        with contextlib.ExitStack() as cleanup:
            cleanup.enter_context(client)
            reader = cleanup.enter_context(client.makefile('rb'))
            client.sendall(b'200 Server ready\r\n')
            while True:
                cmd = reader.readline()
                if cmd == b'CAPABILITIES\r\n':
                    client.sendall(
                        b'101 Capability list:\r\n'
                        b'VERSION 2\r\n'
                        b'STARTTLS\r\n'
                        b'.\r\n'
                    )
                elif cmd == b'STARTTLS\r\n':
                    reader.close()
                    client.sendall(b'382 Begin TLS negotiation now\r\n')
                    context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
                    context.load_cert_chain(certfile)
                    client = context.wrap_socket(
                        client, server_side=True)
                    cleanup.enter_context(client)
                    reader = cleanup.enter_context(client.makefile('rb'))
                elif cmd == b'QUIT\r\n':
                    client.sendall(b'205 Bye!\r\n')
                    break
                else:
                    raise ValueError('Unexpected command {!r}'.format(cmd))

@unittest.skipUnless(ssl, 'requires SSL support')
    def test_starttls(self):
        file = self.nntp.file
        sock = self.nntp.sock
        self.nntp.starttls()
        # Check that the socket and internal pseudo-file really were
        # changed.
        self.assertNotEqual(file, self.nntp.file)
        self.assertNotEqual(sock, self.nntp.sock)
        # Check that the new socket really is an SSL one
        self.assertIsInstance(self.nntp.sock, ssl.SSLSocket)
        # Check that trying starttls when it's already active fails.
        self.assertRaises(ValueError, self.nntp.starttls)

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

${this.title}

Code Editor : test_nntplib.py