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c C s t d k p | t k S( s� Test whether a resource is enabled.
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c s � f d � } | S( s� Decorator raising SkipTest if the OS is Mac OS X and the OS X
version if less than min_version.
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is lesser than 10.5.
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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).
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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.( t socketR t close( t familyt socktypet tempsockt port( ( s- /usr/lib64/python2.7/test/support/__init__.pyR � s
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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.
t SO_REUSEADDRi sH tests should never set the SO_REUSEADDR socket option on TCP/IP sockets!t SO_REUSEPORTsH tests should never set the SO_REUSEPORT socket option on TCP/IP sockets!t SO_EXCLUSIVEADDRUSEi ( R� R� t AF_INETRo t SOCK_STREAMR� t
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Decorator for tests only applicable on CPython.
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if check_impl_detail(): # only on CPython (default)
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( R Ro R� t python_implementationR� ( R R
( ( s- /usr/lib64/python2.7/test/support/__init__.pyR3 � s c C sr g } x\ | j D]Q } t | t j � rE t | | � | j | � q | | � r | j | � q q W| | _ d S( s> Recursively filter test cases in a suite based on a predicate.N( t _testsRi RG t TestSuitet
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findTestCasesR� t makeSuiteR R# R ( t classest valid_typesR t cls( ( s- /usr/lib64/python2.7/test/support/__init__.pyR, ] s
R t win32t WITH_DOC_STRINGSs test requires docstringsc C s� d d l } | d k r! t } n d } t j } t � t _ z> | j | d | �\ } } | ry t d | | f � � n Wd | t _ Xt r� d | j | f GHn | | f S( s
Run doctest on the given module. Return (#failures, #tests).
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test.support's belief about verbosity on to doctest. Else doctest's
usual behavior is used (it searches sys.argv for -v).
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� St j � � � f d � � } | S( s� 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.
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statement exit.
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threads exit the internal t_bootstrap() C function of the thread module.
threading_setup() and threading_cleanup() are designed to emit a warning
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c C sc t t d � r_ d } xG t r[ y/ t j | t j � \ } } | d k rL Pn Wq Pq Xq Wn d S( s� 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.
t waitpidi����i N( R� Ru RV RK t WNOHANG( t any_processR+ t status( ( s- /usr/lib64/python2.7/test/support/__init__.pyR7 � s c c s� t | � } g } zf y, x% | D] } | j � | j | � q WWn. t rk d t | � t | � f GHn � n Xd VWd | r� | � n t j � } } x� t d d � D]� } | d 7} x. | D]& } | j t | t j � d � � q� Wg | D] } | j � r� | ^ q� } | sPn t r� d t | � | f GHq� q� WXg | D] } | j � rE| ^ qE} | r�t
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Usage:
with swap_attr(obj, "attr", 5):
...
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restoring the old value at the end of the block. If `attr` doesn't
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block.
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target of the "as" clause, if there is one.
N( R� Rg R� t delattr( Rp Rf t new_valt real_val( ( s- /usr/lib64/python2.7/test/support/__init__.pyt swap_attr) s c c sk | | k r: | | } | | | <z | VWd | | | <Xn- | | | <z d VWd | | k rf | | =n Xd S( s� Temporary swap out an item with a new object.
Usage:
with swap_item(obj, "item", 5):
...
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exist on `obj`, it will be created and then deleted at the end of the
block.
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c C sT t j d � p d } d } x, | j � D] } | j d � r( | } q( q( W| d k S( s, Find if Python was built with optimizations.t PY_CFLAGSR� s -Os -O0s -Og( R� s -O0s -Og( t sysconfigt get_config_varR� RR ( t cflagst final_optt opt( ( s- /usr/lib64/python2.7/test/support/__init__.pyt python_is_optimized� s
c B s, e Z d Z d Z d Z d � Z d � Z RS( s� Try to prevent a crash report from popping up.
On Windows, don't display the Windows Error Reporting dialog. On UNIX,
disable the creation of coredump file.
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(SIGBUS), or a different error depending on the platform.
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Save an restore signal handlers.
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handlers.
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