diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/future/backports/test/support.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/future/backports/test/support.py | 2016 |
1 files changed, 2016 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/future/backports/test/support.py b/.venv/lib/python3.12/site-packages/future/backports/test/support.py new file mode 100644 index 00000000..6639372b --- /dev/null +++ b/.venv/lib/python3.12/site-packages/future/backports/test/support.py @@ -0,0 +1,2016 @@ +# -*- coding: utf-8 -*- +"""Supporting definitions for the Python regression tests. + +Backported for python-future from Python 3.3 test/support.py. +""" + +from __future__ import (absolute_import, division, + print_function, unicode_literals) +from future import utils +from future.builtins import str, range, open, int, map, list + +import contextlib +import errno +import functools +import gc +import socket +import sys +import os +import platform +import shutil +import warnings +import unittest +# For Python 2.6 compatibility: +if not hasattr(unittest, 'skip'): + import unittest2 as unittest + +import importlib +# import collections.abc # not present on Py2.7 +import re +import subprocess +import time +try: + import sysconfig +except ImportError: + # sysconfig is not available on Python 2.6. Try using distutils.sysconfig instead: + from distutils import sysconfig +import fnmatch +import logging.handlers +import struct +import tempfile + +try: + if utils.PY3: + import _thread, threading + else: + import thread as _thread, threading +except ImportError: + _thread = None + threading = None +try: + import multiprocessing.process +except ImportError: + multiprocessing = None + +try: + import zlib +except ImportError: + zlib = None + +try: + import gzip +except ImportError: + gzip = None + +try: + import bz2 +except ImportError: + bz2 = None + +try: + import lzma +except ImportError: + lzma = None + +__all__ = [ + "Error", "TestFailed", "ResourceDenied", "import_module", "verbose", + "use_resources", "max_memuse", "record_original_stdout", + "get_original_stdout", "unload", "unlink", "rmtree", "forget", + "is_resource_enabled", "requires", "requires_freebsd_version", + "requires_linux_version", "requires_mac_ver", "find_unused_port", + "bind_port", "IPV6_ENABLED", "is_jython", "TESTFN", "HOST", "SAVEDCWD", + "temp_cwd", "findfile", "create_empty_file", "sortdict", + "check_syntax_error", "open_urlresource", "check_warnings", "CleanImport", + "EnvironmentVarGuard", "TransientResource", "captured_stdout", + "captured_stdin", "captured_stderr", "time_out", "socket_peer_reset", + "ioerror_peer_reset", "run_with_locale", 'temp_umask', + "transient_internet", "set_memlimit", "bigmemtest", "bigaddrspacetest", + "BasicTestRunner", "run_unittest", "run_doctest", "threading_setup", + "threading_cleanup", "reap_children", "cpython_only", "check_impl_detail", + "get_attribute", "swap_item", "swap_attr", "requires_IEEE_754", + "TestHandler", "Matcher", "can_symlink", "skip_unless_symlink", + "skip_unless_xattr", "import_fresh_module", "requires_zlib", + "PIPE_MAX_SIZE", "failfast", "anticipate_failure", "run_with_tz", + "requires_gzip", "requires_bz2", "requires_lzma", "suppress_crash_popup", + ] + +class Error(Exception): + """Base class for regression test exceptions.""" + +class TestFailed(Error): + """Test failed.""" + +class ResourceDenied(unittest.SkipTest): + """Test skipped because it requested a disallowed resource. + + This is raised when a test calls requires() for a resource that + has not be enabled. It is used to distinguish between expected + and unexpected skips. + """ + +@contextlib.contextmanager +def _ignore_deprecated_imports(ignore=True): + """Context manager to suppress package and module deprecation + warnings when importing them. + + If ignore is False, this context manager has no effect.""" + if ignore: + with warnings.catch_warnings(): + warnings.filterwarnings("ignore", ".+ (module|package)", + DeprecationWarning) + yield + else: + yield + + +def import_module(name, deprecated=False): + """Import and return the module to be tested, raising SkipTest if + it is not available. + + If deprecated is True, any module or package deprecation messages + will be suppressed.""" + with _ignore_deprecated_imports(deprecated): + try: + return importlib.import_module(name) + except ImportError as msg: + raise unittest.SkipTest(str(msg)) + + +def _save_and_remove_module(name, orig_modules): + """Helper function to save and remove a module from sys.modules + + Raise ImportError if the module can't be imported. + """ + # try to import the module and raise an error if it can't be imported + if name not in sys.modules: + __import__(name) + del sys.modules[name] + for modname in list(sys.modules): + if modname == name or modname.startswith(name + '.'): + orig_modules[modname] = sys.modules[modname] + del sys.modules[modname] + +def _save_and_block_module(name, orig_modules): + """Helper function to save and block a module in sys.modules + + Return True if the module was in sys.modules, False otherwise. + """ + saved = True + try: + orig_modules[name] = sys.modules[name] + except KeyError: + saved = False + sys.modules[name] = None + return saved + + +def anticipate_failure(condition): + """Decorator to mark a test that is known to be broken in some cases + + Any use of this decorator should have a comment identifying the + associated tracker issue. + """ + if condition: + return unittest.expectedFailure + return lambda f: f + + +def import_fresh_module(name, fresh=(), blocked=(), deprecated=False): + """Import and return a module, deliberately bypassing sys.modules. + This function imports and returns a fresh copy of the named Python module + by removing the named module from sys.modules before doing the import. + Note that unlike reload, the original module is not affected by + this operation. + + *fresh* is an iterable of additional module names that are also removed + from the sys.modules cache before doing the import. + + *blocked* is an iterable of module names that are replaced with None + in the module cache during the import to ensure that attempts to import + them raise ImportError. + + The named module and any modules named in the *fresh* and *blocked* + parameters are saved before starting the import and then reinserted into + sys.modules when the fresh import is complete. + + Module and package deprecation messages are suppressed during this import + if *deprecated* is True. + + This function will raise ImportError if the named module cannot be + imported. + + If deprecated is True, any module or package deprecation messages + will be suppressed. + """ + # NOTE: test_heapq, test_json and test_warnings include extra sanity checks + # to make sure that this utility function is working as expected + with _ignore_deprecated_imports(deprecated): + # Keep track of modules saved for later restoration as well + # as those which just need a blocking entry removed + orig_modules = {} + names_to_remove = [] + _save_and_remove_module(name, orig_modules) + try: + for fresh_name in fresh: + _save_and_remove_module(fresh_name, orig_modules) + for blocked_name in blocked: + if not _save_and_block_module(blocked_name, orig_modules): + names_to_remove.append(blocked_name) + fresh_module = importlib.import_module(name) + except ImportError: + fresh_module = None + finally: + for orig_name, module in orig_modules.items(): + sys.modules[orig_name] = module + for name_to_remove in names_to_remove: + del sys.modules[name_to_remove] + return fresh_module + + +def get_attribute(obj, name): + """Get an attribute, raising SkipTest if AttributeError is raised.""" + try: + attribute = getattr(obj, name) + except AttributeError: + raise unittest.SkipTest("object %r has no attribute %r" % (obj, name)) + else: + return attribute + +verbose = 1 # Flag set to 0 by regrtest.py +use_resources = None # Flag set to [] by regrtest.py +max_memuse = 0 # Disable bigmem tests (they will still be run with + # small sizes, to make sure they work.) +real_max_memuse = 0 +failfast = False +match_tests = None + +# _original_stdout is meant to hold stdout at the time regrtest began. +# This may be "the real" stdout, or IDLE's emulation of stdout, or whatever. +# The point is to have some flavor of stdout the user can actually see. +_original_stdout = None +def record_original_stdout(stdout): + global _original_stdout + _original_stdout = stdout + +def get_original_stdout(): + return _original_stdout or sys.stdout + +def unload(name): + try: + del sys.modules[name] + except KeyError: + pass + +if sys.platform.startswith("win"): + def _waitfor(func, pathname, waitall=False): + # Perform the operation + func(pathname) + # Now setup the wait loop + if waitall: + dirname = pathname + else: + dirname, name = os.path.split(pathname) + dirname = dirname or '.' + # Check for `pathname` to be removed from the filesystem. + # The exponential backoff of the timeout amounts to a total + # of ~1 second after which the deletion is probably an error + # anyway. + # Testing on a i7@4.3GHz shows that usually only 1 iteration is + # required when contention occurs. + timeout = 0.001 + while timeout < 1.0: + # Note we are only testing for the existence of the file(s) in + # the contents of the directory regardless of any security or + # access rights. If we have made it this far, we have sufficient + # permissions to do that much using Python's equivalent of the + # Windows API FindFirstFile. + # Other Windows APIs can fail or give incorrect results when + # dealing with files that are pending deletion. + L = os.listdir(dirname) + if not (L if waitall else name in L): + return + # Increase the timeout and try again + time.sleep(timeout) + timeout *= 2 + warnings.warn('tests may fail, delete still pending for ' + pathname, + RuntimeWarning, stacklevel=4) + + def _unlink(filename): + _waitfor(os.unlink, filename) + + def _rmdir(dirname): + _waitfor(os.rmdir, dirname) + + def _rmtree(path): + def _rmtree_inner(path): + for name in os.listdir(path): + fullname = os.path.join(path, name) + if os.path.isdir(fullname): + _waitfor(_rmtree_inner, fullname, waitall=True) + os.rmdir(fullname) + else: + os.unlink(fullname) + _waitfor(_rmtree_inner, path, waitall=True) + _waitfor(os.rmdir, path) +else: + _unlink = os.unlink + _rmdir = os.rmdir + _rmtree = shutil.rmtree + +def unlink(filename): + try: + _unlink(filename) + except OSError as error: + # The filename need not exist. + if error.errno not in (errno.ENOENT, errno.ENOTDIR): + raise + +def rmdir(dirname): + try: + _rmdir(dirname) + except OSError as error: + # The directory need not exist. + if error.errno != errno.ENOENT: + raise + +def rmtree(path): + try: + _rmtree(path) + except OSError as error: + if error.errno != errno.ENOENT: + raise + + +# On some platforms, should not run gui test even if it is allowed +# in `use_resources'. +if sys.platform.startswith('win'): + import ctypes + import ctypes.wintypes + def _is_gui_available(): + UOI_FLAGS = 1 + WSF_VISIBLE = 0x0001 + class USEROBJECTFLAGS(ctypes.Structure): + _fields_ = [("fInherit", ctypes.wintypes.BOOL), + ("fReserved", ctypes.wintypes.BOOL), + ("dwFlags", ctypes.wintypes.DWORD)] + dll = ctypes.windll.user32 + h = dll.GetProcessWindowStation() + if not h: + raise ctypes.WinError() + uof = USEROBJECTFLAGS() + needed = ctypes.wintypes.DWORD() + res = dll.GetUserObjectInformationW(h, + UOI_FLAGS, + ctypes.byref(uof), + ctypes.sizeof(uof), + ctypes.byref(needed)) + if not res: + raise ctypes.WinError() + return bool(uof.dwFlags & WSF_VISIBLE) +else: + def _is_gui_available(): + return True + +def is_resource_enabled(resource): + """Test whether a resource is enabled. Known resources are set by + regrtest.py.""" + return use_resources is not None and resource in use_resources + +def requires(resource, msg=None): + """Raise ResourceDenied if the specified resource is not available. + + If the caller's module is __main__ then automatically return True. The + possibility of False being returned occurs when regrtest.py is + executing. + """ + if resource == 'gui' and not _is_gui_available(): + raise unittest.SkipTest("Cannot use the 'gui' resource") + # see if the caller's module is __main__ - if so, treat as if + # the resource was set + if sys._getframe(1).f_globals.get("__name__") == "__main__": + return + if not is_resource_enabled(resource): + if msg is None: + msg = "Use of the %r resource not enabled" % resource + raise ResourceDenied(msg) + +def _requires_unix_version(sysname, min_version): + """Decorator raising SkipTest if the OS is `sysname` and the version is less + than `min_version`. + + For example, @_requires_unix_version('FreeBSD', (7, 2)) raises SkipTest if + the FreeBSD version is less than 7.2. + """ + def decorator(func): + @functools.wraps(func) + def wrapper(*args, **kw): + if platform.system() == sysname: + version_txt = platform.release().split('-', 1)[0] + try: + version = tuple(map(int, version_txt.split('.'))) + except ValueError: + pass + else: + if version < min_version: + min_version_txt = '.'.join(map(str, min_version)) + raise unittest.SkipTest( + "%s version %s or higher required, not %s" + % (sysname, min_version_txt, version_txt)) + return func(*args, **kw) + wrapper.min_version = min_version + return wrapper + return decorator + +def requires_freebsd_version(*min_version): + """Decorator raising SkipTest if the OS is FreeBSD and the FreeBSD version is + less than `min_version`. + + For example, @requires_freebsd_version(7, 2) raises SkipTest if the FreeBSD + version is less than 7.2. + """ + return _requires_unix_version('FreeBSD', min_version) + +def requires_linux_version(*min_version): + """Decorator raising SkipTest if the OS is Linux and the Linux version is + less than `min_version`. + + For example, @requires_linux_version(2, 6, 32) raises SkipTest if the Linux + version is less than 2.6.32. + """ + return _requires_unix_version('Linux', min_version) + +def requires_mac_ver(*min_version): + """Decorator raising SkipTest if the OS is Mac OS X and the OS X + version if less than min_version. + + For example, @requires_mac_ver(10, 5) raises SkipTest if the OS X version + is lesser than 10.5. + """ + def decorator(func): + @functools.wraps(func) + def wrapper(*args, **kw): + if sys.platform == 'darwin': + version_txt = platform.mac_ver()[0] + try: + version = tuple(map(int, version_txt.split('.'))) + except ValueError: + pass + else: + if version < min_version: + min_version_txt = '.'.join(map(str, min_version)) + raise unittest.SkipTest( + "Mac OS X %s or higher required, not %s" + % (min_version_txt, version_txt)) + return func(*args, **kw) + wrapper.min_version = min_version + return wrapper + return decorator + +# Don't use "localhost", since resolving it uses the DNS under recent +# Windows versions (see issue #18792). +HOST = "127.0.0.1" +HOSTv6 = "::1" + + +def find_unused_port(family=socket.AF_INET, socktype=socket.SOCK_STREAM): + """Returns an unused port that should be suitable for binding. This is + achieved by creating a temporary socket with the same family and type as + the 'sock' parameter (default is AF_INET, SOCK_STREAM), and binding it to + the specified host address (defaults to 0.0.0.0) with the port set to 0, + eliciting an unused ephemeral port from the OS. The temporary socket is + then closed and deleted, and the ephemeral port is returned. + + Either this method or bind_port() should be used for any tests where a + server socket needs to be bound to a particular port for the duration of + the test. Which one to use depends on whether the calling code is creating + a python socket, or if an unused port needs to be provided in a constructor + or passed to an external program (i.e. the -accept argument to openssl's + s_server mode). Always prefer bind_port() over find_unused_port() where + possible. Hard coded ports should *NEVER* be used. As soon as a server + socket is bound to a hard coded port, the ability to run multiple instances + of the test simultaneously on the same host is compromised, which makes the + test a ticking time bomb in a buildbot environment. On Unix buildbots, this + may simply manifest as a failed test, which can be recovered from without + intervention in most cases, but on Windows, the entire python process can + completely and utterly wedge, requiring someone to log in to the buildbot + and manually kill the affected process. + + (This is easy to reproduce on Windows, unfortunately, and can be traced to + the SO_REUSEADDR socket option having different semantics on Windows versus + Unix/Linux. On Unix, you can't have two AF_INET SOCK_STREAM sockets bind, + listen and then accept connections on identical host/ports. An EADDRINUSE + socket.error will be raised at some point (depending on the platform and + the order bind and listen were called on each socket). + + However, on Windows, if SO_REUSEADDR is set on the sockets, no EADDRINUSE + will ever be raised when attempting to bind two identical host/ports. When + accept() is called on each socket, the second caller's process will steal + the port from the first caller, leaving them both in an awkwardly wedged + state where they'll no longer respond to any signals or graceful kills, and + must be forcibly killed via OpenProcess()/TerminateProcess(). + + The solution on Windows is to use the SO_EXCLUSIVEADDRUSE socket option + instead of SO_REUSEADDR, which effectively affords the same semantics as + SO_REUSEADDR on Unix. Given the propensity of Unix developers in the Open + Source world compared to Windows ones, this is a common mistake. A quick + look over OpenSSL's 0.9.8g source shows that they use SO_REUSEADDR when + openssl.exe is called with the 's_server' option, for example. See + http://bugs.python.org/issue2550 for more info. The following site also + has a very thorough description about the implications of both REUSEADDR + and EXCLUSIVEADDRUSE on Windows: + http://msdn2.microsoft.com/en-us/library/ms740621(VS.85).aspx) + + XXX: although this approach is a vast improvement on previous attempts to + elicit unused ports, it rests heavily on the assumption that the ephemeral + port returned to us by the OS won't immediately be dished back out to some + other process when we close and delete our temporary socket but before our + calling code has a chance to bind the returned port. We can deal with this + issue if/when we come across it. + """ + + tempsock = socket.socket(family, socktype) + port = bind_port(tempsock) + tempsock.close() + del tempsock + return port + +def bind_port(sock, host=HOST): + """Bind the socket to a free port and return the port number. Relies on + ephemeral ports in order to ensure we are using an unbound port. This is + important as many tests may be running simultaneously, especially in a + buildbot environment. This method raises an exception if the sock.family + is AF_INET and sock.type is SOCK_STREAM, *and* the socket has SO_REUSEADDR + or SO_REUSEPORT set on it. Tests should *never* set these socket options + for TCP/IP sockets. The only case for setting these options is testing + multicasting via multiple UDP sockets. + + Additionally, if the SO_EXCLUSIVEADDRUSE socket option is available (i.e. + on Windows), it will be set on the socket. This will prevent anyone else + from bind()'ing to our host/port for the duration of the test. + """ + + if sock.family == socket.AF_INET and sock.type == socket.SOCK_STREAM: + if hasattr(socket, 'SO_REUSEADDR'): + if sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR) == 1: + raise TestFailed("tests should never set the SO_REUSEADDR " \ + "socket option on TCP/IP sockets!") + if hasattr(socket, 'SO_REUSEPORT'): + try: + if sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT) == 1: + raise TestFailed("tests should never set the SO_REUSEPORT " \ + "socket option on TCP/IP sockets!") + except socket.error: + # Python's socket module was compiled using modern headers + # thus defining SO_REUSEPORT but this process is running + # under an older kernel that does not support SO_REUSEPORT. + pass + if hasattr(socket, 'SO_EXCLUSIVEADDRUSE'): + sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1) + + sock.bind((host, 0)) + port = sock.getsockname()[1] + return port + +def _is_ipv6_enabled(): + """Check whether IPv6 is enabled on this host.""" + if socket.has_ipv6: + sock = None + try: + sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM) + sock.bind(('::1', 0)) + return True + except (socket.error, socket.gaierror): + pass + finally: + if sock: + sock.close() + return False + +IPV6_ENABLED = _is_ipv6_enabled() + + +# A constant likely larger than the underlying OS pipe buffer size, to +# make writes blocking. +# Windows limit seems to be around 512 B, and many Unix kernels have a +# 64 KiB pipe buffer size or 16 * PAGE_SIZE: take a few megs to be sure. +# (see issue #17835 for a discussion of this number). +PIPE_MAX_SIZE = 4 * 1024 * 1024 + 1 + +# A constant likely larger than the underlying OS socket buffer size, to make +# writes blocking. +# The socket buffer sizes can usually be tuned system-wide (e.g. through sysctl +# on Linux), or on a per-socket basis (SO_SNDBUF/SO_RCVBUF). See issue #18643 +# for a discussion of this number). +SOCK_MAX_SIZE = 16 * 1024 * 1024 + 1 + +# # decorator for skipping tests on non-IEEE 754 platforms +# requires_IEEE_754 = unittest.skipUnless( +# float.__getformat__("double").startswith("IEEE"), +# "test requires IEEE 754 doubles") + +requires_zlib = unittest.skipUnless(zlib, 'requires zlib') + +requires_bz2 = unittest.skipUnless(bz2, 'requires bz2') + +requires_lzma = unittest.skipUnless(lzma, 'requires lzma') + +is_jython = sys.platform.startswith('java') + +# Filename used for testing +if os.name == 'java': + # Jython disallows @ in module names + TESTFN = '$test' +else: + TESTFN = '@test' + +# Disambiguate TESTFN for parallel testing, while letting it remain a valid +# module name. +TESTFN = "{0}_{1}_tmp".format(TESTFN, os.getpid()) + +# # FS_NONASCII: non-ASCII character encodable by os.fsencode(), +# # or None if there is no such character. +# FS_NONASCII = None +# for character in ( +# # First try printable and common characters to have a readable filename. +# # For each character, the encoding list are just example of encodings able +# # to encode the character (the list is not exhaustive). +# +# # U+00E6 (Latin Small Letter Ae): cp1252, iso-8859-1 +# '\u00E6', +# # U+0130 (Latin Capital Letter I With Dot Above): cp1254, iso8859_3 +# '\u0130', +# # U+0141 (Latin Capital Letter L With Stroke): cp1250, cp1257 +# '\u0141', +# # U+03C6 (Greek Small Letter Phi): cp1253 +# '\u03C6', +# # U+041A (Cyrillic Capital Letter Ka): cp1251 +# '\u041A', +# # U+05D0 (Hebrew Letter Alef): Encodable to cp424 +# '\u05D0', +# # U+060C (Arabic Comma): cp864, cp1006, iso8859_6, mac_arabic +# '\u060C', +# # U+062A (Arabic Letter Teh): cp720 +# '\u062A', +# # U+0E01 (Thai Character Ko Kai): cp874 +# '\u0E01', +# +# # Then try more "special" characters. "special" because they may be +# # interpreted or displayed differently depending on the exact locale +# # encoding and the font. +# +# # U+00A0 (No-Break Space) +# '\u00A0', +# # U+20AC (Euro Sign) +# '\u20AC', +# ): +# try: +# os.fsdecode(os.fsencode(character)) +# except UnicodeError: +# pass +# else: +# FS_NONASCII = character +# break +# +# # TESTFN_UNICODE is a non-ascii filename +# TESTFN_UNICODE = TESTFN + "-\xe0\xf2\u0258\u0141\u011f" +# if sys.platform == 'darwin': +# # In Mac OS X's VFS API file names are, by definition, canonically +# # decomposed Unicode, encoded using UTF-8. See QA1173: +# # http://developer.apple.com/mac/library/qa/qa2001/qa1173.html +# import unicodedata +# TESTFN_UNICODE = unicodedata.normalize('NFD', TESTFN_UNICODE) +# TESTFN_ENCODING = sys.getfilesystemencoding() +# +# # TESTFN_UNENCODABLE is a filename (str type) that should *not* be able to be +# # encoded by the filesystem encoding (in strict mode). It can be None if we +# # cannot generate such filename. +# TESTFN_UNENCODABLE = None +# if os.name in ('nt', 'ce'): +# # skip win32s (0) or Windows 9x/ME (1) +# if sys.getwindowsversion().platform >= 2: +# # Different kinds of characters from various languages to minimize the +# # probability that the whole name is encodable to MBCS (issue #9819) +# TESTFN_UNENCODABLE = TESTFN + "-\u5171\u0141\u2661\u0363\uDC80" +# try: +# TESTFN_UNENCODABLE.encode(TESTFN_ENCODING) +# except UnicodeEncodeError: +# pass +# else: +# print('WARNING: The filename %r CAN be encoded by the filesystem encoding (%s). ' +# 'Unicode filename tests may not be effective' +# % (TESTFN_UNENCODABLE, TESTFN_ENCODING)) +# TESTFN_UNENCODABLE = None +# # Mac OS X denies unencodable filenames (invalid utf-8) +# elif sys.platform != 'darwin': +# try: +# # ascii and utf-8 cannot encode the byte 0xff +# b'\xff'.decode(TESTFN_ENCODING) +# except UnicodeDecodeError: +# # 0xff will be encoded using the surrogate character u+DCFF +# TESTFN_UNENCODABLE = TESTFN \ +# + b'-\xff'.decode(TESTFN_ENCODING, 'surrogateescape') +# else: +# # File system encoding (eg. ISO-8859-* encodings) can encode +# # the byte 0xff. Skip some unicode filename tests. +# pass +# +# # TESTFN_UNDECODABLE is a filename (bytes type) that should *not* be able to be +# # decoded from the filesystem encoding (in strict mode). It can be None if we +# # cannot generate such filename (ex: the latin1 encoding can decode any byte +# # sequence). On UNIX, TESTFN_UNDECODABLE can be decoded by os.fsdecode() thanks +# # to the surrogateescape error handler (PEP 383), but not from the filesystem +# # encoding in strict mode. +# TESTFN_UNDECODABLE = None +# for name in ( +# # b'\xff' is not decodable by os.fsdecode() with code page 932. Windows +# # accepts it to create a file or a directory, or don't accept to enter to +# # such directory (when the bytes name is used). So test b'\xe7' first: it is +# # not decodable from cp932. +# b'\xe7w\xf0', +# # undecodable from ASCII, UTF-8 +# b'\xff', +# # undecodable from iso8859-3, iso8859-6, iso8859-7, cp424, iso8859-8, cp856 +# # and cp857 +# b'\xae\xd5' +# # undecodable from UTF-8 (UNIX and Mac OS X) +# b'\xed\xb2\x80', b'\xed\xb4\x80', +# # undecodable from shift_jis, cp869, cp874, cp932, cp1250, cp1251, cp1252, +# # cp1253, cp1254, cp1255, cp1257, cp1258 +# b'\x81\x98', +# ): +# try: +# name.decode(TESTFN_ENCODING) +# except UnicodeDecodeError: +# TESTFN_UNDECODABLE = os.fsencode(TESTFN) + name +# break +# +# if FS_NONASCII: +# TESTFN_NONASCII = TESTFN + '-' + FS_NONASCII +# else: +# TESTFN_NONASCII = None + +# Save the initial cwd +SAVEDCWD = os.getcwd() + +@contextlib.contextmanager +def temp_cwd(name='tempcwd', quiet=False, path=None): + """ + Context manager that temporarily changes the CWD. + + An existing path may be provided as *path*, in which case this + function makes no changes to the file system. + + Otherwise, the new CWD is created in the current directory and it's + named *name*. If *quiet* is False (default) and it's not possible to + create or change the CWD, an error is raised. If it's True, only a + warning is raised and the original CWD is used. + """ + saved_dir = os.getcwd() + is_temporary = False + if path is None: + path = name + try: + os.mkdir(name) + is_temporary = True + except OSError: + if not quiet: + raise + warnings.warn('tests may fail, unable to create temp CWD ' + name, + RuntimeWarning, stacklevel=3) + try: + os.chdir(path) + except OSError: + if not quiet: + raise + warnings.warn('tests may fail, unable to change the CWD to ' + path, + RuntimeWarning, stacklevel=3) + try: + yield os.getcwd() + finally: + os.chdir(saved_dir) + if is_temporary: + rmtree(name) + + +if hasattr(os, "umask"): + @contextlib.contextmanager + def temp_umask(umask): + """Context manager that temporarily sets the process umask.""" + oldmask = os.umask(umask) + try: + yield + finally: + os.umask(oldmask) + + +def findfile(file, here=__file__, subdir=None): + """Try to find a file on sys.path and the working directory. If it is not + found the argument passed to the function is returned (this does not + necessarily signal failure; could still be the legitimate path).""" + if os.path.isabs(file): + return file + if subdir is not None: + file = os.path.join(subdir, file) + path = sys.path + path = [os.path.dirname(here)] + path + for dn in path: + fn = os.path.join(dn, file) + if os.path.exists(fn): return fn + return file + +def create_empty_file(filename): + """Create an empty file. If the file already exists, truncate it.""" + fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_TRUNC) + os.close(fd) + +def sortdict(dict): + "Like repr(dict), but in sorted order." + items = sorted(dict.items()) + reprpairs = ["%r: %r" % pair for pair in items] + withcommas = ", ".join(reprpairs) + return "{%s}" % withcommas + +def make_bad_fd(): + """ + Create an invalid file descriptor by opening and closing a file and return + its fd. + """ + file = open(TESTFN, "wb") + try: + return file.fileno() + finally: + file.close() + unlink(TESTFN) + +def check_syntax_error(testcase, statement): + testcase.assertRaises(SyntaxError, compile, statement, + '<test string>', 'exec') + +def open_urlresource(url, *args, **kw): + from future.backports.urllib import (request as urllib_request, + parse as urllib_parse) + + check = kw.pop('check', None) + + filename = urllib_parse.urlparse(url)[2].split('/')[-1] # '/': it's URL! + + fn = os.path.join(os.path.dirname(__file__), "data", filename) + + def check_valid_file(fn): + f = open(fn, *args, **kw) + if check is None: + return f + elif check(f): + f.seek(0) + return f + f.close() + + if os.path.exists(fn): + f = check_valid_file(fn) + if f is not None: + return f + unlink(fn) + + # Verify the requirement before downloading the file + requires('urlfetch') + + print('\tfetching %s ...' % url, file=get_original_stdout()) + f = urllib_request.urlopen(url, timeout=15) + try: + with open(fn, "wb") as out: + s = f.read() + while s: + out.write(s) + s = f.read() + finally: + f.close() + + f = check_valid_file(fn) + if f is not None: + return f + raise TestFailed('invalid resource %r' % fn) + + +class WarningsRecorder(object): + """Convenience wrapper for the warnings list returned on + entry to the warnings.catch_warnings() context manager. + """ + def __init__(self, warnings_list): + self._warnings = warnings_list + self._last = 0 + + def __getattr__(self, attr): + if len(self._warnings) > self._last: + return getattr(self._warnings[-1], attr) + elif attr in warnings.WarningMessage._WARNING_DETAILS: + return None + raise AttributeError("%r has no attribute %r" % (self, attr)) + + @property + def warnings(self): + return self._warnings[self._last:] + + def reset(self): + self._last = len(self._warnings) + + +def _filterwarnings(filters, quiet=False): + """Catch the warnings, then check if all the expected + warnings have been raised and re-raise unexpected warnings. + If 'quiet' is True, only re-raise the unexpected warnings. + """ + # Clear the warning registry of the calling module + # in order to re-raise the warnings. + frame = sys._getframe(2) + registry = frame.f_globals.get('__warningregistry__') + if registry: + if utils.PY3: + registry.clear() + else: + # Py2-compatible: + for i in range(len(registry)): + registry.pop() + with warnings.catch_warnings(record=True) as w: + # Set filter "always" to record all warnings. Because + # test_warnings swap the module, we need to look up in + # the sys.modules dictionary. + sys.modules['warnings'].simplefilter("always") + yield WarningsRecorder(w) + # Filter the recorded warnings + reraise = list(w) + missing = [] + for msg, cat in filters: + seen = False + for w in reraise[:]: + warning = w.message + # Filter out the matching messages + if (re.match(msg, str(warning), re.I) and + issubclass(warning.__class__, cat)): + seen = True + reraise.remove(w) + if not seen and not quiet: + # This filter caught nothing + missing.append((msg, cat.__name__)) + if reraise: + raise AssertionError("unhandled warning %s" % reraise[0]) + if missing: + raise AssertionError("filter (%r, %s) did not catch any warning" % + missing[0]) + + +@contextlib.contextmanager +def check_warnings(*filters, **kwargs): + """Context manager to silence warnings. + + Accept 2-tuples as positional arguments: + ("message regexp", WarningCategory) + + Optional argument: + - if 'quiet' is True, it does not fail if a filter catches nothing + (default True without argument, + default False if some filters are defined) + + Without argument, it defaults to: + check_warnings(("", Warning), quiet=True) + """ + quiet = kwargs.get('quiet') + if not filters: + filters = (("", Warning),) + # Preserve backward compatibility + if quiet is None: + quiet = True + return _filterwarnings(filters, quiet) + + +class CleanImport(object): + """Context manager to force import to return a new module reference. + + This is useful for testing module-level behaviours, such as + the emission of a DeprecationWarning on import. + + Use like this: + + with CleanImport("foo"): + importlib.import_module("foo") # new reference + """ + + def __init__(self, *module_names): + self.original_modules = sys.modules.copy() + for module_name in module_names: + if module_name in sys.modules: + module = sys.modules[module_name] + # It is possible that module_name is just an alias for + # another module (e.g. stub for modules renamed in 3.x). + # In that case, we also need delete the real module to clear + # the import cache. + if module.__name__ != module_name: + del sys.modules[module.__name__] + del sys.modules[module_name] + + def __enter__(self): + return self + + def __exit__(self, *ignore_exc): + sys.modules.update(self.original_modules) + +### Added for python-future: +if utils.PY3: + import collections.abc + mybase = collections.abc.MutableMapping +else: + import UserDict + mybase = UserDict.DictMixin +### + +class EnvironmentVarGuard(mybase): + + """Class to help protect the environment variable properly. Can be used as + a context manager.""" + + def __init__(self): + self._environ = os.environ + self._changed = {} + + def __getitem__(self, envvar): + return self._environ[envvar] + + def __setitem__(self, envvar, value): + # Remember the initial value on the first access + if envvar not in self._changed: + self._changed[envvar] = self._environ.get(envvar) + self._environ[envvar] = value + + def __delitem__(self, envvar): + # Remember the initial value on the first access + if envvar not in self._changed: + self._changed[envvar] = self._environ.get(envvar) + if envvar in self._environ: + del self._environ[envvar] + + def keys(self): + return self._environ.keys() + + def __iter__(self): + return iter(self._environ) + + def __len__(self): + return len(self._environ) + + def set(self, envvar, value): + self[envvar] = value + + def unset(self, envvar): + del self[envvar] + + def __enter__(self): + return self + + def __exit__(self, *ignore_exc): + for (k, v) in self._changed.items(): + if v is None: + if k in self._environ: + del self._environ[k] + else: + self._environ[k] = v + os.environ = self._environ + + +class DirsOnSysPath(object): + """Context manager to temporarily add directories to sys.path. + + This makes a copy of sys.path, appends any directories given + as positional arguments, then reverts sys.path to the copied + settings when the context ends. + + Note that *all* sys.path modifications in the body of the + context manager, including replacement of the object, + will be reverted at the end of the block. + """ + + def __init__(self, *paths): + self.original_value = sys.path[:] + self.original_object = sys.path + sys.path.extend(paths) + + def __enter__(self): + return self + + def __exit__(self, *ignore_exc): + sys.path = self.original_object + sys.path[:] = self.original_value + + +class TransientResource(object): + + """Raise ResourceDenied if an exception is raised while the context manager + is in effect that matches the specified exception and attributes.""" + + def __init__(self, exc, **kwargs): + self.exc = exc + self.attrs = kwargs + + def __enter__(self): + return self + + def __exit__(self, type_=None, value=None, traceback=None): + """If type_ is a subclass of self.exc and value has attributes matching + self.attrs, raise ResourceDenied. Otherwise let the exception + propagate (if any).""" + if type_ is not None and issubclass(self.exc, type_): + for attr, attr_value in self.attrs.items(): + if not hasattr(value, attr): + break + if getattr(value, attr) != attr_value: + break + else: + raise ResourceDenied("an optional resource is not available") + +# Context managers that raise ResourceDenied when various issues +# with the Internet connection manifest themselves as exceptions. +# XXX deprecate these and use transient_internet() instead +time_out = TransientResource(IOError, errno=errno.ETIMEDOUT) +socket_peer_reset = TransientResource(socket.error, errno=errno.ECONNRESET) +ioerror_peer_reset = TransientResource(IOError, errno=errno.ECONNRESET) + + +@contextlib.contextmanager +def transient_internet(resource_name, timeout=30.0, errnos=()): + """Return a context manager that raises ResourceDenied when various issues + with the Internet connection manifest themselves as exceptions.""" + default_errnos = [ + ('ECONNREFUSED', 111), + ('ECONNRESET', 104), + ('EHOSTUNREACH', 113), + ('ENETUNREACH', 101), + ('ETIMEDOUT', 110), + ] + default_gai_errnos = [ + ('EAI_AGAIN', -3), + ('EAI_FAIL', -4), + ('EAI_NONAME', -2), + ('EAI_NODATA', -5), + # Encountered when trying to resolve IPv6-only hostnames + ('WSANO_DATA', 11004), + ] + + denied = ResourceDenied("Resource %r is not available" % resource_name) + captured_errnos = errnos + gai_errnos = [] + if not captured_errnos: + captured_errnos = [getattr(errno, name, num) + for (name, num) in default_errnos] + gai_errnos = [getattr(socket, name, num) + for (name, num) in default_gai_errnos] + + def filter_error(err): + n = getattr(err, 'errno', None) + if (isinstance(err, socket.timeout) or + (isinstance(err, socket.gaierror) and n in gai_errnos) or + n in captured_errnos): + if not verbose: + sys.stderr.write(denied.args[0] + "\n") + # Was: raise denied from err + # For Python-Future: + exc = denied + exc.__cause__ = err + raise exc + + old_timeout = socket.getdefaulttimeout() + try: + if timeout is not None: + socket.setdefaulttimeout(timeout) + yield + except IOError as err: + # urllib can wrap original socket errors multiple times (!), we must + # unwrap to get at the original error. + while True: + a = err.args + if len(a) >= 1 and isinstance(a[0], IOError): + err = a[0] + # The error can also be wrapped as args[1]: + # except socket.error as msg: + # raise IOError('socket error', msg).with_traceback(sys.exc_info()[2]) + elif len(a) >= 2 and isinstance(a[1], IOError): + err = a[1] + else: + break + filter_error(err) + raise + # XXX should we catch generic exceptions and look for their + # __cause__ or __context__? + finally: + socket.setdefaulttimeout(old_timeout) + + +@contextlib.contextmanager +def captured_output(stream_name): + """Return a context manager used by captured_stdout/stdin/stderr + that temporarily replaces the sys stream *stream_name* with a StringIO.""" + import io + orig_stdout = getattr(sys, stream_name) + setattr(sys, stream_name, io.StringIO()) + try: + yield getattr(sys, stream_name) + finally: + setattr(sys, stream_name, orig_stdout) + +def captured_stdout(): + """Capture the output of sys.stdout: + + with captured_stdout() as s: + print("hello") + self.assertEqual(s.getvalue(), "hello") + """ + return captured_output("stdout") + +def captured_stderr(): + return captured_output("stderr") + +def captured_stdin(): + return captured_output("stdin") + + +def gc_collect(): + """Force as many objects as possible to be collected. + + In non-CPython implementations of Python, this is needed because timely + deallocation is not guaranteed by the garbage collector. (Even in CPython + this can be the case in case of reference cycles.) This means that __del__ + methods may be called later than expected and weakrefs may remain alive for + longer than expected. This function tries its best to force all garbage + objects to disappear. + """ + gc.collect() + if is_jython: + time.sleep(0.1) + gc.collect() + gc.collect() + +@contextlib.contextmanager +def disable_gc(): + have_gc = gc.isenabled() + gc.disable() + try: + yield + finally: + if have_gc: + gc.enable() + + +def python_is_optimized(): + """Find if Python was built with optimizations.""" + # We don't have sysconfig on Py2.6: + import sysconfig + cflags = sysconfig.get_config_var('PY_CFLAGS') or '' + final_opt = "" + for opt in cflags.split(): + if opt.startswith('-O'): + final_opt = opt + return final_opt != '' and final_opt != '-O0' + + +_header = 'nP' +_align = '0n' +if hasattr(sys, "gettotalrefcount"): + _header = '2P' + _header + _align = '0P' +_vheader = _header + 'n' + +def calcobjsize(fmt): + return struct.calcsize(_header + fmt + _align) + +def calcvobjsize(fmt): + return struct.calcsize(_vheader + fmt + _align) + + +_TPFLAGS_HAVE_GC = 1<<14 +_TPFLAGS_HEAPTYPE = 1<<9 + +def check_sizeof(test, o, size): + result = sys.getsizeof(o) + # add GC header size + if ((type(o) == type) and (o.__flags__ & _TPFLAGS_HEAPTYPE) or\ + ((type(o) != type) and (type(o).__flags__ & _TPFLAGS_HAVE_GC))): + size += _testcapi.SIZEOF_PYGC_HEAD + msg = 'wrong size for %s: got %d, expected %d' \ + % (type(o), result, size) + test.assertEqual(result, size, msg) + +#======================================================================= +# Decorator for running a function in a different locale, correctly resetting +# it afterwards. + +def run_with_locale(catstr, *locales): + def decorator(func): + def inner(*args, **kwds): + try: + import locale + category = getattr(locale, catstr) + orig_locale = locale.setlocale(category) + except AttributeError: + # if the test author gives us an invalid category string + raise + except: + # cannot retrieve original locale, so do nothing + locale = orig_locale = None + else: + for loc in locales: + try: + locale.setlocale(category, loc) + break + except: + pass + + # now run the function, resetting the locale on exceptions + try: + return func(*args, **kwds) + finally: + if locale and orig_locale: + locale.setlocale(category, orig_locale) + inner.__name__ = func.__name__ + inner.__doc__ = func.__doc__ + return inner + return decorator + +#======================================================================= +# Decorator for running a function in a specific timezone, correctly +# resetting it afterwards. + +def run_with_tz(tz): + def decorator(func): + def inner(*args, **kwds): + try: + tzset = time.tzset + except AttributeError: + raise unittest.SkipTest("tzset required") + if 'TZ' in os.environ: + orig_tz = os.environ['TZ'] + else: + orig_tz = None + os.environ['TZ'] = tz + tzset() + + # now run the function, resetting the tz on exceptions + try: + return func(*args, **kwds) + finally: + if orig_tz is None: + del os.environ['TZ'] + else: + os.environ['TZ'] = orig_tz + time.tzset() + + inner.__name__ = func.__name__ + inner.__doc__ = func.__doc__ + return inner + return decorator + +#======================================================================= +# Big-memory-test support. Separate from 'resources' because memory use +# should be configurable. + +# Some handy shorthands. Note that these are used for byte-limits as well +# as size-limits, in the various bigmem tests +_1M = 1024*1024 +_1G = 1024 * _1M +_2G = 2 * _1G +_4G = 4 * _1G + +MAX_Py_ssize_t = sys.maxsize + +def set_memlimit(limit): + global max_memuse + global real_max_memuse + sizes = { + 'k': 1024, + 'm': _1M, + 'g': _1G, + 't': 1024*_1G, + } + m = re.match(r'(\d+(\.\d+)?) (K|M|G|T)b?$', limit, + re.IGNORECASE | re.VERBOSE) + if m is None: + raise ValueError('Invalid memory limit %r' % (limit,)) + memlimit = int(float(m.group(1)) * sizes[m.group(3).lower()]) + real_max_memuse = memlimit + if memlimit > MAX_Py_ssize_t: + memlimit = MAX_Py_ssize_t + if memlimit < _2G - 1: + raise ValueError('Memory limit %r too low to be useful' % (limit,)) + max_memuse = memlimit + +class _MemoryWatchdog(object): + """An object which periodically watches the process' memory consumption + and prints it out. + """ + + def __init__(self): + self.procfile = '/proc/{pid}/statm'.format(pid=os.getpid()) + self.started = False + + def start(self): + try: + f = open(self.procfile, 'r') + except OSError as e: + warnings.warn('/proc not available for stats: {0}'.format(e), + RuntimeWarning) + sys.stderr.flush() + return + + watchdog_script = findfile("memory_watchdog.py") + self.mem_watchdog = subprocess.Popen([sys.executable, watchdog_script], + stdin=f, stderr=subprocess.DEVNULL) + f.close() + self.started = True + + def stop(self): + if self.started: + self.mem_watchdog.terminate() + self.mem_watchdog.wait() + + +def bigmemtest(size, memuse, dry_run=True): + """Decorator for bigmem tests. + + 'minsize' is the minimum useful size for the test (in arbitrary, + test-interpreted units.) 'memuse' is the number of 'bytes per size' for + the test, or a good estimate of it. + + if 'dry_run' is False, it means the test doesn't support dummy runs + when -M is not specified. + """ + def decorator(f): + def wrapper(self): + size = wrapper.size + memuse = wrapper.memuse + if not real_max_memuse: + maxsize = 5147 + else: + maxsize = size + + if ((real_max_memuse or not dry_run) + and real_max_memuse < maxsize * memuse): + raise unittest.SkipTest( + "not enough memory: %.1fG minimum needed" + % (size * memuse / (1024 ** 3))) + + if real_max_memuse and verbose: + print() + print(" ... expected peak memory use: {peak:.1f}G" + .format(peak=size * memuse / (1024 ** 3))) + watchdog = _MemoryWatchdog() + watchdog.start() + else: + watchdog = None + + try: + return f(self, maxsize) + finally: + if watchdog: + watchdog.stop() + + wrapper.size = size + wrapper.memuse = memuse + return wrapper + return decorator + +def bigaddrspacetest(f): + """Decorator for tests that fill the address space.""" + def wrapper(self): + if max_memuse < MAX_Py_ssize_t: + if MAX_Py_ssize_t >= 2**63 - 1 and max_memuse >= 2**31: + raise unittest.SkipTest( + "not enough memory: try a 32-bit build instead") + else: + raise unittest.SkipTest( + "not enough memory: %.1fG minimum needed" + % (MAX_Py_ssize_t / (1024 ** 3))) + else: + return f(self) + return wrapper + +#======================================================================= +# unittest integration. + +class BasicTestRunner(object): + def run(self, test): + result = unittest.TestResult() + test(result) + return result + +def _id(obj): + return obj + +def requires_resource(resource): + if resource == 'gui' and not _is_gui_available(): + return unittest.skip("resource 'gui' is not available") + if is_resource_enabled(resource): + return _id + else: + return unittest.skip("resource {0!r} is not enabled".format(resource)) + +def cpython_only(test): + """ + Decorator for tests only applicable on CPython. + """ + return impl_detail(cpython=True)(test) + +def impl_detail(msg=None, **guards): + if check_impl_detail(**guards): + return _id + if msg is None: + guardnames, default = _parse_guards(guards) + if default: + msg = "implementation detail not available on {0}" + else: + msg = "implementation detail specific to {0}" + guardnames = sorted(guardnames.keys()) + msg = msg.format(' or '.join(guardnames)) + return unittest.skip(msg) + +def _parse_guards(guards): + # Returns a tuple ({platform_name: run_me}, default_value) + if not guards: + return ({'cpython': True}, False) + is_true = list(guards.values())[0] + assert list(guards.values()) == [is_true] * len(guards) # all True or all False + return (guards, not is_true) + +# Use the following check to guard CPython's implementation-specific tests -- +# or to run them only on the implementation(s) guarded by the arguments. +def check_impl_detail(**guards): + """This function returns True or False depending on the host platform. + Examples: + if check_impl_detail(): # only on CPython (default) + if check_impl_detail(jython=True): # only on Jython + if check_impl_detail(cpython=False): # everywhere except on CPython + """ + guards, default = _parse_guards(guards) + return guards.get(platform.python_implementation().lower(), default) + + +def no_tracing(func): + """Decorator to temporarily turn off tracing for the duration of a test.""" + if not hasattr(sys, 'gettrace'): + return func + else: + @functools.wraps(func) + def wrapper(*args, **kwargs): + original_trace = sys.gettrace() + try: + sys.settrace(None) + return func(*args, **kwargs) + finally: + sys.settrace(original_trace) + return wrapper + + +def refcount_test(test): + """Decorator for tests which involve reference counting. + + To start, the decorator does not run the test if is not run by CPython. + After that, any trace function is unset during the test to prevent + unexpected refcounts caused by the trace function. + + """ + return no_tracing(cpython_only(test)) + + +def _filter_suite(suite, pred): + """Recursively filter test cases in a suite based on a predicate.""" + newtests = [] + for test in suite._tests: + if isinstance(test, unittest.TestSuite): + _filter_suite(test, pred) + newtests.append(test) + else: + if pred(test): + newtests.append(test) + suite._tests = newtests + +def _run_suite(suite): + """Run tests from a unittest.TestSuite-derived class.""" + if verbose: + runner = unittest.TextTestRunner(sys.stdout, verbosity=2, + failfast=failfast) + else: + runner = BasicTestRunner() + + result = runner.run(suite) + if not result.wasSuccessful(): + if len(result.errors) == 1 and not result.failures: + err = result.errors[0][1] + elif len(result.failures) == 1 and not result.errors: + err = result.failures[0][1] + else: + err = "multiple errors occurred" + if not verbose: err += "; run in verbose mode for details" + raise TestFailed(err) + + +def run_unittest(*classes): + """Run tests from unittest.TestCase-derived classes.""" + valid_types = (unittest.TestSuite, unittest.TestCase) + suite = unittest.TestSuite() + for cls in classes: + if isinstance(cls, str): + if cls in sys.modules: + suite.addTest(unittest.findTestCases(sys.modules[cls])) + else: + raise ValueError("str arguments must be keys in sys.modules") + elif isinstance(cls, valid_types): + suite.addTest(cls) + else: + suite.addTest(unittest.makeSuite(cls)) + def case_pred(test): + if match_tests is None: + return True + for name in test.id().split("."): + if fnmatch.fnmatchcase(name, match_tests): + return True + return False + _filter_suite(suite, case_pred) + _run_suite(suite) + +# We don't have sysconfig on Py2.6: +# #======================================================================= +# # Check for the presence of docstrings. +# +# HAVE_DOCSTRINGS = (check_impl_detail(cpython=False) or +# sys.platform == 'win32' or +# sysconfig.get_config_var('WITH_DOC_STRINGS')) +# +# requires_docstrings = unittest.skipUnless(HAVE_DOCSTRINGS, +# "test requires docstrings") +# +# +# #======================================================================= +# doctest driver. + +def run_doctest(module, verbosity=None, optionflags=0): + """Run doctest on the given module. Return (#failures, #tests). + + If optional argument verbosity is not specified (or is None), pass + support's belief about verbosity on to doctest. Else doctest's + usual behavior is used (it searches sys.argv for -v). + """ + + import doctest + + if verbosity is None: + verbosity = verbose + else: + verbosity = None + + f, t = doctest.testmod(module, verbose=verbosity, optionflags=optionflags) + if f: + raise TestFailed("%d of %d doctests failed" % (f, t)) + if verbose: + print('doctest (%s) ... %d tests with zero failures' % + (module.__name__, t)) + return f, t + + +#======================================================================= +# Support for saving and restoring the imported modules. + +def modules_setup(): + return sys.modules.copy(), + +def modules_cleanup(oldmodules): + # Encoders/decoders are registered permanently within the internal + # codec cache. If we destroy the corresponding modules their + # globals will be set to None which will trip up the cached functions. + encodings = [(k, v) for k, v in sys.modules.items() + if k.startswith('encodings.')] + # Was: + # sys.modules.clear() + # Py2-compatible: + for i in range(len(sys.modules)): + sys.modules.pop() + + sys.modules.update(encodings) + # XXX: This kind of problem can affect more than just encodings. In particular + # extension modules (such as _ssl) don't cope with reloading properly. + # Really, test modules should be cleaning out the test specific modules they + # know they added (ala test_runpy) rather than relying on this function (as + # test_importhooks and test_pkg do currently). + # Implicitly imported *real* modules should be left alone (see issue 10556). + sys.modules.update(oldmodules) + +#======================================================================= +# Backported versions of threading_setup() and threading_cleanup() which don't refer +# to threading._dangling (not available on Py2.7). + +# Threading support to prevent reporting refleaks when running regrtest.py -R + +# NOTE: we use thread._count() rather than threading.enumerate() (or the +# moral equivalent thereof) because a threading.Thread object is still alive +# until its __bootstrap() method has returned, even after it has been +# unregistered from the threading module. +# thread._count(), on the other hand, only gets decremented *after* the +# __bootstrap() method has returned, which gives us reliable reference counts +# at the end of a test run. + +def threading_setup(): + if _thread: + return _thread._count(), + else: + return 1, + +def threading_cleanup(nb_threads): + if not _thread: + return + + _MAX_COUNT = 10 + for count in range(_MAX_COUNT): + n = _thread._count() + if n == nb_threads: + break + time.sleep(0.1) + # XXX print a warning in case of failure? + +def reap_threads(func): + """Use this function when threads are being used. This will + ensure that the threads are cleaned up even when the test fails. + If threading is unavailable this function does nothing. + """ + if not _thread: + return func + + @functools.wraps(func) + def decorator(*args): + key = threading_setup() + try: + return func(*args) + finally: + threading_cleanup(*key) + return decorator + +def reap_children(): + """Use this function at the end of test_main() whenever sub-processes + are started. This will help ensure that no extra children (zombies) + stick around to hog resources and create problems when looking + for refleaks. + """ + + # Reap all our dead child processes so we don't leave zombies around. + # These hog resources and might be causing some of the buildbots to die. + if hasattr(os, 'waitpid'): + any_process = -1 + while True: + try: + # This will raise an exception on Windows. That's ok. + pid, status = os.waitpid(any_process, os.WNOHANG) + if pid == 0: + break + except: + break + +@contextlib.contextmanager +def swap_attr(obj, attr, new_val): + """Temporary swap out an attribute with a new object. + + Usage: + with swap_attr(obj, "attr", 5): + ... + + This will set obj.attr to 5 for the duration of the with: block, + restoring the old value at the end of the block. If `attr` doesn't + exist on `obj`, it will be created and then deleted at the end of the + block. + """ + if hasattr(obj, attr): + real_val = getattr(obj, attr) + setattr(obj, attr, new_val) + try: + yield + finally: + setattr(obj, attr, real_val) + else: + setattr(obj, attr, new_val) + try: + yield + finally: + delattr(obj, attr) + +@contextlib.contextmanager +def swap_item(obj, item, new_val): + """Temporary swap out an item with a new object. + + Usage: + with swap_item(obj, "item", 5): + ... + + This will set obj["item"] to 5 for the duration of the with: block, + restoring the old value at the end of the block. If `item` doesn't + exist on `obj`, it will be created and then deleted at the end of the + block. + """ + if item in obj: + real_val = obj[item] + obj[item] = new_val + try: + yield + finally: + obj[item] = real_val + else: + obj[item] = new_val + try: + yield + finally: + del obj[item] + +def strip_python_stderr(stderr): + """Strip the stderr of a Python process from potential debug output + emitted by the interpreter. + + This will typically be run on the result of the communicate() method + of a subprocess.Popen object. + """ + stderr = re.sub(br"\[\d+ refs\]\r?\n?", b"", stderr).strip() + return stderr + +def args_from_interpreter_flags(): + """Return a list of command-line arguments reproducing the current + settings in sys.flags and sys.warnoptions.""" + return subprocess._args_from_interpreter_flags() + +#============================================================ +# Support for assertions about logging. +#============================================================ + +class TestHandler(logging.handlers.BufferingHandler): + def __init__(self, matcher): + # BufferingHandler takes a "capacity" argument + # so as to know when to flush. As we're overriding + # shouldFlush anyway, we can set a capacity of zero. + # You can call flush() manually to clear out the + # buffer. + logging.handlers.BufferingHandler.__init__(self, 0) + self.matcher = matcher + + def shouldFlush(self): + return False + + def emit(self, record): + self.format(record) + self.buffer.append(record.__dict__) + + def matches(self, **kwargs): + """ + Look for a saved dict whose keys/values match the supplied arguments. + """ + result = False + for d in self.buffer: + if self.matcher.matches(d, **kwargs): + result = True + break + return result + +class Matcher(object): + + _partial_matches = ('msg', 'message') + + def matches(self, d, **kwargs): + """ + Try to match a single dict with the supplied arguments. + + Keys whose values are strings and which are in self._partial_matches + will be checked for partial (i.e. substring) matches. You can extend + this scheme to (for example) do regular expression matching, etc. + """ + result = True + for k in kwargs: + v = kwargs[k] + dv = d.get(k) + if not self.match_value(k, dv, v): + result = False + break + return result + + def match_value(self, k, dv, v): + """ + Try to match a single stored value (dv) with a supplied value (v). + """ + if type(v) != type(dv): + result = False + elif type(dv) is not str or k not in self._partial_matches: + result = (v == dv) + else: + result = dv.find(v) >= 0 + return result + + +_can_symlink = None +def can_symlink(): + global _can_symlink + if _can_symlink is not None: + return _can_symlink + symlink_path = TESTFN + "can_symlink" + try: + os.symlink(TESTFN, symlink_path) + can = True + except (OSError, NotImplementedError, AttributeError): + can = False + else: + os.remove(symlink_path) + _can_symlink = can + return can + +def skip_unless_symlink(test): + """Skip decorator for tests that require functional symlink""" + ok = can_symlink() + msg = "Requires functional symlink implementation" + return test if ok else unittest.skip(msg)(test) + +_can_xattr = None +def can_xattr(): + global _can_xattr + if _can_xattr is not None: + return _can_xattr + if not hasattr(os, "setxattr"): + can = False + else: + tmp_fp, tmp_name = tempfile.mkstemp() + try: + with open(TESTFN, "wb") as fp: + try: + # TESTFN & tempfile may use different file systems with + # different capabilities + os.setxattr(tmp_fp, b"user.test", b"") + os.setxattr(fp.fileno(), b"user.test", b"") + # Kernels < 2.6.39 don't respect setxattr flags. + kernel_version = platform.release() + m = re.match("2.6.(\d{1,2})", kernel_version) + can = m is None or int(m.group(1)) >= 39 + except OSError: + can = False + finally: + unlink(TESTFN) + unlink(tmp_name) + _can_xattr = can + return can + +def skip_unless_xattr(test): + """Skip decorator for tests that require functional extended attributes""" + ok = can_xattr() + msg = "no non-broken extended attribute support" + return test if ok else unittest.skip(msg)(test) + + +if sys.platform.startswith('win'): + @contextlib.contextmanager + def suppress_crash_popup(): + """Disable Windows Error Reporting dialogs using SetErrorMode.""" + # see http://msdn.microsoft.com/en-us/library/windows/desktop/ms680621%28v=vs.85%29.aspx + # GetErrorMode is not available on Windows XP and Windows Server 2003, + # but SetErrorMode returns the previous value, so we can use that + import ctypes + k32 = ctypes.windll.kernel32 + SEM_NOGPFAULTERRORBOX = 0x02 + old_error_mode = k32.SetErrorMode(SEM_NOGPFAULTERRORBOX) + k32.SetErrorMode(old_error_mode | SEM_NOGPFAULTERRORBOX) + try: + yield + finally: + k32.SetErrorMode(old_error_mode) +else: + # this is a no-op for other platforms + @contextlib.contextmanager + def suppress_crash_popup(): + yield + + +def patch(test_instance, object_to_patch, attr_name, new_value): + """Override 'object_to_patch'.'attr_name' with 'new_value'. + + Also, add a cleanup procedure to 'test_instance' to restore + 'object_to_patch' value for 'attr_name'. + The 'attr_name' should be a valid attribute for 'object_to_patch'. + + """ + # check that 'attr_name' is a real attribute for 'object_to_patch' + # will raise AttributeError if it does not exist + getattr(object_to_patch, attr_name) + + # keep a copy of the old value + attr_is_local = False + try: + old_value = object_to_patch.__dict__[attr_name] + except (AttributeError, KeyError): + old_value = getattr(object_to_patch, attr_name, None) + else: + attr_is_local = True + + # restore the value when the test is done + def cleanup(): + if attr_is_local: + setattr(object_to_patch, attr_name, old_value) + else: + delattr(object_to_patch, attr_name) + + test_instance.addCleanup(cleanup) + + # actually override the attribute + setattr(object_to_patch, attr_name, new_value) |