1601 lines
56 KiB
Python
1601 lines
56 KiB
Python
"""Supporting definitions for the Python regression tests."""
|
|
|
|
if __name__ != 'test.test_support':
|
|
raise ImportError('test_support must be imported from the test package')
|
|
|
|
import contextlib
|
|
import errno
|
|
import functools
|
|
import gc
|
|
import socket
|
|
import sys
|
|
import os
|
|
import platform
|
|
import shutil
|
|
import warnings
|
|
import unittest
|
|
import importlib
|
|
import UserDict
|
|
import re
|
|
import time
|
|
import struct
|
|
import sysconfig
|
|
try:
|
|
import thread
|
|
except ImportError:
|
|
thread = 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_mac_ver",
|
|
"find_unused_port", "bind_port",
|
|
"fcmp", "have_unicode", "is_jython", "TESTFN", "HOST", "FUZZ",
|
|
"SAVEDCWD", "temp_cwd", "findfile", "sortdict", "check_syntax_error",
|
|
"open_urlresource", "check_warnings", "check_py3k_warnings",
|
|
"CleanImport", "EnvironmentVarGuard", "captured_output",
|
|
"captured_stdout", "TransientResource", "transient_internet",
|
|
"run_with_locale", "set_memlimit", "bigmemtest", "bigaddrspacetest",
|
|
"BasicTestRunner", "run_unittest", "run_doctest", "threading_setup",
|
|
"threading_cleanup", "reap_threads", "start_threads", "cpython_only",
|
|
"check_impl_detail", "get_attribute", "py3k_bytes",
|
|
"import_fresh_module", "threading_cleanup", "reap_children",
|
|
"strip_python_stderr", "IPV6_ENABLED"]
|
|
|
|
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 been 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, 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 import_fresh_module(name, fresh=(), blocked=(), deprecated=False):
|
|
"""Imports and returns a module, deliberately bypassing the sys.modules cache
|
|
and importing a fresh copy of the module. Once the import is complete,
|
|
the sys.modules cache is restored to its original state.
|
|
|
|
Modules named in fresh are also imported anew if needed by the import.
|
|
If one of these modules can't be imported, None is returned.
|
|
|
|
Importing of modules named in blocked is prevented while the fresh import
|
|
takes place.
|
|
|
|
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("module %s has no attribute %s" % (
|
|
obj.__name__, 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
|
|
|
|
# _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:
|
|
pass
|
|
|
|
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, e:
|
|
# Unix returns ENOENT, Windows returns ESRCH.
|
|
if e.errno not in (errno.ENOENT, errno.ESRCH):
|
|
raise
|
|
|
|
def forget(modname):
|
|
'''"Forget" a module was ever imported by removing it from sys.modules and
|
|
deleting any .pyc and .pyo files.'''
|
|
unload(modname)
|
|
for dirname in sys.path:
|
|
unlink(os.path.join(dirname, modname + os.extsep + 'pyc'))
|
|
# Deleting the .pyo file cannot be within the 'try' for the .pyc since
|
|
# the chance exists that there is no .pyc (and thus the 'try' statement
|
|
# is exited) but there is a .pyo file.
|
|
unlink(os.path.join(dirname, modname + os.extsep + 'pyo'))
|
|
|
|
# Check whether a gui is actually available
|
|
def _is_gui_available():
|
|
if hasattr(_is_gui_available, 'result'):
|
|
return _is_gui_available.result
|
|
reason = None
|
|
if sys.platform.startswith('win'):
|
|
# if Python is running as a service (such as the buildbot service),
|
|
# gui interaction may be disallowed
|
|
import ctypes
|
|
import ctypes.wintypes
|
|
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()
|
|
if not bool(uof.dwFlags & WSF_VISIBLE):
|
|
reason = "gui not available (WSF_VISIBLE flag not set)"
|
|
elif sys.platform == 'darwin':
|
|
# The Aqua Tk implementations on OS X can abort the process if
|
|
# being called in an environment where a window server connection
|
|
# cannot be made, for instance when invoked by a buildbot or ssh
|
|
# process not running under the same user id as the current console
|
|
# user. To avoid that, raise an exception if the window manager
|
|
# connection is not available.
|
|
from ctypes import cdll, c_int, pointer, Structure
|
|
from ctypes.util import find_library
|
|
|
|
app_services = cdll.LoadLibrary(find_library("ApplicationServices"))
|
|
|
|
if app_services.CGMainDisplayID() == 0:
|
|
reason = "gui tests cannot run without OS X window manager"
|
|
else:
|
|
class ProcessSerialNumber(Structure):
|
|
_fields_ = [("highLongOfPSN", c_int),
|
|
("lowLongOfPSN", c_int)]
|
|
psn = ProcessSerialNumber()
|
|
psn_p = pointer(psn)
|
|
if ( (app_services.GetCurrentProcess(psn_p) < 0) or
|
|
(app_services.SetFrontProcess(psn_p) < 0) ):
|
|
reason = "cannot run without OS X gui process"
|
|
|
|
# check on every platform whether tkinter can actually do anything
|
|
if not reason:
|
|
try:
|
|
from Tkinter import Tk
|
|
root = Tk()
|
|
root.update()
|
|
root.destroy()
|
|
except Exception as e:
|
|
err_string = str(e)
|
|
if len(err_string) > 50:
|
|
err_string = err_string[:50] + ' [...]'
|
|
reason = 'Tk unavailable due to {}: {}'.format(type(e).__name__,
|
|
err_string)
|
|
|
|
_is_gui_available.reason = reason
|
|
_is_gui_available.result = not reason
|
|
|
|
return _is_gui_available.result
|
|
|
|
def is_resource_enabled(resource):
|
|
"""Test whether a resource is enabled.
|
|
|
|
Known resources are set by regrtest.py. If not running under regrtest.py,
|
|
all resources are assumed enabled unless use_resources has been set.
|
|
"""
|
|
return use_resources is None or resource in use_resources
|
|
|
|
def requires(resource, msg=None):
|
|
"""Raise ResourceDenied if the specified resource is not available."""
|
|
if resource == 'gui' and not _is_gui_available():
|
|
raise ResourceDenied(_is_gui_available.reason)
|
|
if not is_resource_enabled(resource):
|
|
if msg is None:
|
|
msg = "Use of the `%s' resource not enabled" % resource
|
|
raise ResourceDenied(msg)
|
|
|
|
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 EnvironmentError:
|
|
# 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((HOSTv6, 0))
|
|
return True
|
|
except socket.error:
|
|
pass
|
|
finally:
|
|
if sock:
|
|
sock.close()
|
|
return False
|
|
|
|
IPV6_ENABLED = _is_ipv6_enabled()
|
|
|
|
def system_must_validate_cert(f):
|
|
"""Skip the test on TLS certificate validation failures."""
|
|
@functools.wraps(f)
|
|
def dec(*args, **kwargs):
|
|
try:
|
|
f(*args, **kwargs)
|
|
except IOError as e:
|
|
if "CERTIFICATE_VERIFY_FAILED" in str(e):
|
|
raise unittest.SkipTest("system does not contain "
|
|
"necessary certificates")
|
|
raise
|
|
return dec
|
|
|
|
FUZZ = 1e-6
|
|
|
|
def fcmp(x, y): # fuzzy comparison function
|
|
if isinstance(x, float) or isinstance(y, float):
|
|
try:
|
|
fuzz = (abs(x) + abs(y)) * FUZZ
|
|
if abs(x-y) <= fuzz:
|
|
return 0
|
|
except:
|
|
pass
|
|
elif type(x) == type(y) and isinstance(x, (tuple, list)):
|
|
for i in range(min(len(x), len(y))):
|
|
outcome = fcmp(x[i], y[i])
|
|
if outcome != 0:
|
|
return outcome
|
|
return (len(x) > len(y)) - (len(x) < len(y))
|
|
return (x > y) - (x < y)
|
|
|
|
|
|
# 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
|
|
|
|
is_jython = sys.platform.startswith('java')
|
|
|
|
try:
|
|
unicode
|
|
have_unicode = True
|
|
except NameError:
|
|
have_unicode = False
|
|
|
|
requires_unicode = unittest.skipUnless(have_unicode, 'no unicode support')
|
|
|
|
def u(s):
|
|
return unicode(s, 'unicode-escape')
|
|
|
|
# FS_NONASCII: non-ASCII Unicode character encodable by
|
|
# sys.getfilesystemencoding(), or None if there is no such character.
|
|
FS_NONASCII = None
|
|
if have_unicode:
|
|
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
|
|
unichr(0x00E6),
|
|
# U+0130 (Latin Capital Letter I With Dot Above): cp1254, iso8859_3
|
|
unichr(0x0130),
|
|
# U+0141 (Latin Capital Letter L With Stroke): cp1250, cp1257
|
|
unichr(0x0141),
|
|
# U+03C6 (Greek Small Letter Phi): cp1253
|
|
unichr(0x03C6),
|
|
# U+041A (Cyrillic Capital Letter Ka): cp1251
|
|
unichr(0x041A),
|
|
# U+05D0 (Hebrew Letter Alef): Encodable to cp424
|
|
unichr(0x05D0),
|
|
# U+060C (Arabic Comma): cp864, cp1006, iso8859_6, mac_arabic
|
|
unichr(0x060C),
|
|
# U+062A (Arabic Letter Teh): cp720
|
|
unichr(0x062A),
|
|
# U+0E01 (Thai Character Ko Kai): cp874
|
|
unichr(0x0E01),
|
|
|
|
# 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)
|
|
unichr(0x00A0),
|
|
# U+20AC (Euro Sign)
|
|
unichr(0x20AC),
|
|
):
|
|
try:
|
|
character.encode(sys.getfilesystemencoding())\
|
|
.decode(sys.getfilesystemencoding())
|
|
except UnicodeError:
|
|
pass
|
|
else:
|
|
FS_NONASCII = character
|
|
break
|
|
|
|
# Filename used for testing
|
|
if os.name == 'java':
|
|
# Jython disallows @ in module names
|
|
TESTFN = '$test'
|
|
elif os.name == 'riscos':
|
|
TESTFN = 'testfile'
|
|
else:
|
|
TESTFN = '@test'
|
|
# Unicode name only used if TEST_FN_ENCODING exists for the platform.
|
|
if have_unicode:
|
|
# Assuming sys.getfilesystemencoding()!=sys.getdefaultencoding()
|
|
# TESTFN_UNICODE is a filename that can be encoded using the
|
|
# file system encoding, but *not* with the default (ascii) encoding
|
|
if isinstance('', unicode):
|
|
# python -U
|
|
# XXX perhaps unicode() should accept Unicode strings?
|
|
TESTFN_UNICODE = "@test-\xe0\xf2"
|
|
else:
|
|
# 2 latin characters.
|
|
TESTFN_UNICODE = unicode("@test-\xe0\xf2", "latin-1")
|
|
TESTFN_ENCODING = sys.getfilesystemencoding()
|
|
# TESTFN_UNENCODABLE is a filename that should *not* be
|
|
# able to be encoded by *either* the default or filesystem encoding.
|
|
# This test really only makes sense on Windows NT platforms
|
|
# which have special Unicode support in posixmodule.
|
|
if (not hasattr(sys, "getwindowsversion") or
|
|
sys.getwindowsversion()[3] < 2): # 0=win32s or 1=9x/ME
|
|
TESTFN_UNENCODABLE = None
|
|
else:
|
|
# Japanese characters (I think - from bug 846133)
|
|
TESTFN_UNENCODABLE = eval('u"@test-\u5171\u6709\u3055\u308c\u308b"')
|
|
try:
|
|
# XXX - Note - should be using TESTFN_ENCODING here - but for
|
|
# Windows, "mbcs" currently always operates as if in
|
|
# errors=ignore' mode - hence we get '?' characters rather than
|
|
# the exception. 'Latin1' operates as we expect - ie, fails.
|
|
# See [ 850997 ] mbcs encoding ignores errors
|
|
TESTFN_UNENCODABLE.encode("Latin1")
|
|
except UnicodeEncodeError:
|
|
pass
|
|
else:
|
|
print \
|
|
'WARNING: The filename %r CAN be encoded by the filesystem. ' \
|
|
'Unicode filename tests may not be effective' \
|
|
% TESTFN_UNENCODABLE
|
|
|
|
|
|
# Disambiguate TESTFN for parallel testing, while letting it remain a valid
|
|
# module name.
|
|
TESTFN = "{}_{}_tmp".format(TESTFN, os.getpid())
|
|
|
|
# Save the initial cwd
|
|
SAVEDCWD = os.getcwd()
|
|
|
|
@contextlib.contextmanager
|
|
def temp_cwd(name='tempcwd', quiet=False):
|
|
"""
|
|
Context manager that creates a temporary directory and set it as CWD.
|
|
|
|
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.
|
|
"""
|
|
if have_unicode and isinstance(name, unicode):
|
|
try:
|
|
name = name.encode(sys.getfilesystemencoding() or 'ascii')
|
|
except UnicodeEncodeError:
|
|
if not quiet:
|
|
raise unittest.SkipTest('unable to encode the cwd name with '
|
|
'the filesystem encoding.')
|
|
saved_dir = os.getcwd()
|
|
is_temporary = False
|
|
try:
|
|
os.mkdir(name)
|
|
os.chdir(name)
|
|
is_temporary = True
|
|
except OSError:
|
|
if not quiet:
|
|
raise
|
|
warnings.warn('tests may fail, unable to change the CWD to ' + name,
|
|
RuntimeWarning, stacklevel=3)
|
|
try:
|
|
yield os.getcwd()
|
|
finally:
|
|
os.chdir(saved_dir)
|
|
if is_temporary:
|
|
rmtree(name)
|
|
|
|
|
|
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 sortdict(dict):
|
|
"Like repr(dict), but in sorted order."
|
|
items = dict.items()
|
|
items.sort()
|
|
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, check=None):
|
|
import urlparse, urllib2
|
|
|
|
filename = urlparse.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)
|
|
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 >> get_original_stdout(), '\tfetching %s ...' % url
|
|
f = urllib2.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 "%s"' % 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:
|
|
registry.clear()
|
|
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 = [warning.message for warning in w]
|
|
missing = []
|
|
for msg, cat in filters:
|
|
seen = False
|
|
for exc in reraise[:]:
|
|
message = str(exc)
|
|
# Filter out the matching messages
|
|
if (re.match(msg, message, re.I) and
|
|
issubclass(exc.__class__, cat)):
|
|
seen = True
|
|
reraise.remove(exc)
|
|
if not seen and not quiet:
|
|
# This filter caught nothing
|
|
missing.append((msg, cat.__name__))
|
|
if reraise:
|
|
raise AssertionError("unhandled warning %r" % 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)
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def check_py3k_warnings(*filters, **kwargs):
|
|
"""Context manager to silence py3k 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 False)
|
|
|
|
Without argument, it defaults to:
|
|
check_py3k_warnings(("", DeprecationWarning), quiet=False)
|
|
"""
|
|
if sys.py3kwarning:
|
|
if not filters:
|
|
filters = (("", DeprecationWarning),)
|
|
else:
|
|
# It should not raise any py3k warning
|
|
filters = ()
|
|
return _filterwarnings(filters, kwargs.get('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)
|
|
|
|
|
|
class EnvironmentVarGuard(UserDict.DictMixin):
|
|
|
|
"""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 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.iteritems():
|
|
if not hasattr(value, attr):
|
|
break
|
|
if getattr(value, attr) != attr_value:
|
|
break
|
|
else:
|
|
raise ResourceDenied("an optional resource is not available")
|
|
|
|
|
|
@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),
|
|
# Windows defines EAI_NODATA as 11001 but idiotic getaddrinfo()
|
|
# implementation actually returns WSANO_DATA i.e. 11004.
|
|
('WSANO_DATA', 11004),
|
|
]
|
|
|
|
denied = ResourceDenied("Resource '%s' 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")
|
|
raise denied
|
|
|
|
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 and captured_stdin
|
|
that temporarily replaces the sys stream *stream_name* with a StringIO."""
|
|
import StringIO
|
|
orig_stdout = getattr(sys, stream_name)
|
|
setattr(sys, stream_name, StringIO.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()
|
|
|
|
|
|
_header = '2P'
|
|
if hasattr(sys, "gettotalrefcount"):
|
|
_header = '2P' + _header
|
|
_vheader = _header + 'P'
|
|
|
|
def calcobjsize(fmt):
|
|
return struct.calcsize(_header + fmt + '0P')
|
|
|
|
def calcvobjsize(fmt):
|
|
return struct.calcsize(_vheader + fmt + '0P')
|
|
|
|
|
|
_TPFLAGS_HAVE_GC = 1<<14
|
|
_TPFLAGS_HEAPTYPE = 1<<9
|
|
|
|
def check_sizeof(test, o, size):
|
|
import _testcapi
|
|
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.func_name = func.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
|
|
|
|
def bigmemtest(minsize, memuse, overhead=5*_1M):
|
|
"""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. 'overhead' specifies fixed overhead,
|
|
independent of the testsize, and defaults to 5Mb.
|
|
|
|
The decorator tries to guess a good value for 'size' and passes it to
|
|
the decorated test function. If minsize * memuse is more than the
|
|
allowed memory use (as defined by max_memuse), the test is skipped.
|
|
Otherwise, minsize is adjusted upward to use up to max_memuse.
|
|
"""
|
|
def decorator(f):
|
|
def wrapper(self):
|
|
if not max_memuse:
|
|
# If max_memuse is 0 (the default),
|
|
# we still want to run the tests with size set to a few kb,
|
|
# to make sure they work. We still want to avoid using
|
|
# too much memory, though, but we do that noisily.
|
|
maxsize = 5147
|
|
self.assertFalse(maxsize * memuse + overhead > 20 * _1M)
|
|
else:
|
|
maxsize = int((max_memuse - overhead) / memuse)
|
|
if maxsize < minsize:
|
|
# Really ought to print 'test skipped' or something
|
|
if verbose:
|
|
sys.stderr.write("Skipping %s because of memory "
|
|
"constraint\n" % (f.__name__,))
|
|
return
|
|
# Try to keep some breathing room in memory use
|
|
maxsize = max(maxsize - 50 * _1M, minsize)
|
|
return f(self, maxsize)
|
|
wrapper.minsize = minsize
|
|
wrapper.memuse = memuse
|
|
wrapper.overhead = overhead
|
|
return wrapper
|
|
return decorator
|
|
|
|
def precisionbigmemtest(size, memuse, overhead=5*_1M, dry_run=True):
|
|
def decorator(f):
|
|
def wrapper(self):
|
|
if not real_max_memuse:
|
|
maxsize = 5147
|
|
else:
|
|
maxsize = size
|
|
|
|
if ((real_max_memuse or not dry_run)
|
|
and real_max_memuse < maxsize * memuse):
|
|
if verbose:
|
|
sys.stderr.write("Skipping %s because of memory "
|
|
"constraint\n" % (f.__name__,))
|
|
return
|
|
|
|
return f(self, maxsize)
|
|
wrapper.size = size
|
|
wrapper.memuse = memuse
|
|
wrapper.overhead = overhead
|
|
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 verbose:
|
|
sys.stderr.write("Skipping %s because of memory "
|
|
"constraint\n" % (f.__name__,))
|
|
else:
|
|
return f(self)
|
|
return wrapper
|
|
|
|
#=======================================================================
|
|
# unittest integration.
|
|
|
|
class BasicTestRunner:
|
|
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(_is_gui_available.reason)
|
|
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 = guards.values()[0]
|
|
assert 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 _run_suite(suite):
|
|
"""Run tests from a unittest.TestSuite-derived class."""
|
|
if verbose:
|
|
runner = unittest.TextTestRunner(sys.stdout, verbosity=2)
|
|
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))
|
|
_run_suite(suite)
|
|
|
|
#=======================================================================
|
|
# 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):
|
|
"""Run doctest on the given module. Return (#failures, #tests).
|
|
|
|
If optional argument verbosity is not specified (or is None), pass
|
|
test_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
|
|
|
|
# Direct doctest output (normally just errors) to real stdout; doctest
|
|
# output shouldn't be compared by regrtest.
|
|
save_stdout = sys.stdout
|
|
sys.stdout = get_original_stdout()
|
|
try:
|
|
f, t = doctest.testmod(module, verbose=verbosity)
|
|
if f:
|
|
raise TestFailed("%d of %d doctests failed" % (f, t))
|
|
finally:
|
|
sys.stdout = save_stdout
|
|
if verbose:
|
|
print 'doctest (%s) ... %d tests with zero failures' % (module.__name__, t)
|
|
return f, t
|
|
|
|
#=======================================================================
|
|
# 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 start_threads(threads, unlock=None):
|
|
threads = list(threads)
|
|
started = []
|
|
try:
|
|
try:
|
|
for t in threads:
|
|
t.start()
|
|
started.append(t)
|
|
except:
|
|
if verbose:
|
|
print("Can't start %d threads, only %d threads started" %
|
|
(len(threads), len(started)))
|
|
raise
|
|
yield
|
|
finally:
|
|
if unlock:
|
|
unlock()
|
|
endtime = starttime = time.time()
|
|
for timeout in range(1, 16):
|
|
endtime += 60
|
|
for t in started:
|
|
t.join(max(endtime - time.time(), 0.01))
|
|
started = [t for t in started if t.isAlive()]
|
|
if not started:
|
|
break
|
|
if verbose:
|
|
print('Unable to join %d threads during a period of '
|
|
'%d minutes' % (len(started), timeout))
|
|
started = [t for t in started if t.isAlive()]
|
|
if started:
|
|
raise AssertionError('Unable to join %d threads' % len(started))
|
|
|
|
@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)
|
|
|
|
def py3k_bytes(b):
|
|
"""Emulate the py3k bytes() constructor.
|
|
|
|
NOTE: This is only a best effort function.
|
|
"""
|
|
try:
|
|
# memoryview?
|
|
return b.tobytes()
|
|
except AttributeError:
|
|
try:
|
|
# iterable of ints?
|
|
return b"".join(chr(x) for x in b)
|
|
except TypeError:
|
|
return bytes(b)
|
|
|
|
def args_from_interpreter_flags():
|
|
"""Return a list of command-line arguments reproducing the current
|
|
settings in sys.flags."""
|
|
import subprocess
|
|
return subprocess._args_from_interpreter_flags()
|
|
|
|
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
|