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c C sj t | xY t j D]N } t t j j | | t j d t t j j | | t j d q Wd S( sm "Forget" a module was ever imported by removing it from sys.modules and
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$c C s t d k o | t k S( sP Test whether a resource is enabled. Known resources are set by
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s c C s] t j d j j d d k r% d St | sY | d k rJ d | } n t | n d S( s Raise ResourceDenied if the specified resource is not available.
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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).
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
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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.
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rV | s9 n t j d | t d d n Xz t j VWd t j | Xd S( sg Return a context manager that changes the current working directory.
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path: the directory to use as the temporary current working directory.
quiet: if False (the default), the context manager raises an exception
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the CWD, an error is raised. If it's True, only a warning is raised
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R R N( R t WarningRS RP R ( R t kwargsR ( ( s) /usr/lib64/python2.7/test/test_support.pyR s c O s@ t j r$ | s* d t f f } q* n d } t | | j d S( sj Context manager to silence py3k warnings.
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c B s) e Z d Z d Z d Z d Z RS( s, Context manager to force import to return a new module reference.
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Use like this:
with CleanImport("foo"):
importlib.import_module("foo") # new reference
c G so t j j | _ xV | D]N } | t j k r t j | } | j | k rZ t j | j =n t j | =q q Wd S( N( RH RI t copyt original_modulesR6 ( R t module_namest module_nameR_ ( ( s) /usr/lib64/python2.7/test/test_support.pyR s
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t d S( Nt stdin( R! ( ( ( s) /usr/lib64/python2.7/test/test_support.pyt captured_stdin s c C s8 t j t r t j d n t j t j d S( s 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.
g?N( t gct collectR Rm Rn ( ( ( s) /usr/lib64/python2.7/test/test_support.pyt
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'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.
c s7 f d } | _ | _ | _ | S( Nc s t s. d } | j | d t k n^ t t } | k ru t rq t j j d j f n d St | d t } | | S( Ni i s) Skipping %s because of memory constraint
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( R R RH R> R R6 ( R R ( t dry_runR R Rn ( s) /usr/lib64/python2.7/test/test_support.pyR d s
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Decorator for tests only applicable on CPython.
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%c K s. t | \ } } | j t j j | S( s5 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
( R R t platformt python_implementationR ( R R ( ( s) /usr/lib64/python2.7/test/test_support.pyR0 s c C s t r! t j t j d d } n t } | j | } | j s t | j d k rx | j
rx | j d d } nL t | j
d k r | j r | j
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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).
iNR s %d of %d doctests faileds, doctest (%s) ... %d tests with zero failures( t doctestRS R RH Rf R t testmodR R6 ( R_ R R t save_stdoutR R~ ( ( s) /usr/lib64/python2.7/test/test_support.pyR+ s
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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.
c s) t } z | SWd t | Xd S( N( R, R- ( R? t key( Rq ( s) /usr/lib64/python2.7/test/test_support.pyR{ 2 s ( R t functoolst wraps( Rq R{ ( ( Rq s) /usr/lib64/python2.7/test/test_support.pyt reap_threads* s 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 waitpidii N( R Ri RP R t WNOHANG( t any_processt pidt status( ( s) /usr/lib64/python2.7/test/test_support.pyR. ; s c c s| t | | rN t | | } t | | | z d VWd t | | | Xn* t | | | z d VWd t | | Xd S( sm 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.
N( R Ra RQ t delattr( Rc R t new_valt real_val( ( s) /usr/lib64/python2.7/test/test_support.pyt swap_attrO s
c C s\ y | j SWnG t k
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rS t | SXn Xd S( sZ Emulate the py3k bytes() constructor.
NOTE: This is only a best effort function.
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c C s d d l } | j S( sZ Return a list of command-line arguments reproducing the current
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subprocesst _args_from_interpreter_flags( R ( ( s) /usr/lib64/python2.7/test/test_support.pyt args_from_interpreter_flagsy s c C s t j d d | j } | S( s 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.
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