| """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 socket |
| import sys |
| import os |
| import os.path |
| import shutil |
| import warnings |
| import unittest |
| |
| class Error(Exception): |
| """Base class for regression test exceptions.""" |
| |
| class TestFailed(Error): |
| """Test failed.""" |
| |
| class TestSkipped(Error): |
| """Test skipped. |
| |
| This can be raised to indicate that a test was deliberatly |
| skipped, but not because a feature wasn't available. For |
| example, if some resource can't be used, such as the network |
| appears to be unavailable, this should be raised instead of |
| TestFailed. |
| """ |
| |
| class ResourceDenied(TestSkipped): |
| """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. |
| """ |
| |
| 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.) |
| |
| # _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 |
| |
| def unlink(filename): |
| try: |
| os.unlink(filename) |
| except OSError: |
| pass |
| |
| def rmtree(path): |
| try: |
| shutil.rmtree(path) |
| except OSError as 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 + '.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 + '.pyo')) |
| |
| 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.""" |
| # see if the caller's module is __main__ - if so, treat as if |
| # the resource was set |
| if sys._getframe().f_back.f_globals.get("__name__") == "__main__": |
| return |
| if not is_resource_enabled(resource): |
| if msg is None: |
| msg = "Use of the `%s' resource not enabled" % resource |
| raise ResourceDenied(msg) |
| |
| HOST = 'localhost' |
| |
| 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'): |
| 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!") |
| if hasattr(socket, 'SO_EXCLUSIVEADDRUSE'): |
| sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1) |
| |
| sock.bind((host, 0)) |
| port = sock.getsockname()[1] |
| return port |
| |
| 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) |
| |
| try: |
| str |
| have_unicode = True |
| except NameError: |
| have_unicode = False |
| |
| is_jython = sys.platform.startswith('java') |
| |
| # Filename used for testing |
| if os.name == 'java': |
| # Jython disallows @ in module names |
| TESTFN = '$test' |
| else: |
| TESTFN = '@test' |
| |
| # 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 |
| TESTFN_UNICODE = "@test-\xe0\xf2" |
| TESTFN_ENCODING = sys.getfilesystemencoding() |
| # TESTFN_UNICODE_UNENCODEABLE 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_UNICODE_UNENCODEABLE = None |
| else: |
| # Japanese characters (I think - from bug 846133) |
| TESTFN_UNICODE_UNENCODEABLE = "@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_UNICODE_UNENCODEABLE.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_UNICODE_UNENCODEABLE) |
| |
| # Make sure we can write to TESTFN, try in /tmp if we can't |
| fp = None |
| try: |
| fp = open(TESTFN, 'w+') |
| except IOError: |
| TMP_TESTFN = os.path.join('/tmp', TESTFN) |
| try: |
| fp = open(TMP_TESTFN, 'w+') |
| TESTFN = TMP_TESTFN |
| del TMP_TESTFN |
| except IOError: |
| print(('WARNING: tests will fail, unable to write to: %s or %s' % |
| (TESTFN, TMP_TESTFN))) |
| if fp is not None: |
| fp.close() |
| unlink(TESTFN) |
| del fp |
| |
| def findfile(file, here=__file__): |
| """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 |
| 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 verify(condition, reason='test failed'): |
| """Verify that condition is true. If not, raise TestFailed. |
| |
| The optional argument reason can be given to provide |
| a better error text. |
| """ |
| |
| if not condition: |
| raise TestFailed(reason) |
| |
| def vereq(a, b): |
| """Raise TestFailed if a == b is false. |
| |
| This is better than verify(a == b) because, in case of failure, the |
| error message incorporates repr(a) and repr(b) so you can see the |
| inputs. |
| |
| Note that "not (a == b)" isn't necessarily the same as "a != b"; the |
| former is tested. |
| """ |
| |
| if not (a == b): |
| raise TestFailed("%r == %r" % (a, b)) |
| |
| 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 check_syntax_error(testcase, statement): |
| try: |
| compile(statement, '<test string>', 'exec') |
| except SyntaxError: |
| pass |
| else: |
| testcase.fail('Missing SyntaxError: "%s"' % statement) |
| |
| def open_urlresource(url, *args, **kw): |
| import urllib, urlparse |
| |
| requires('urlfetch') |
| filename = urlparse.urlparse(url)[2].split('/')[-1] # '/': it's URL! |
| |
| for path in [os.path.curdir, os.path.pardir]: |
| fn = os.path.join(path, filename) |
| if os.path.exists(fn): |
| return open(fn, *args, **kw) |
| |
| print('\tfetching %s ...' % url, file=get_original_stdout()) |
| fn, _ = urllib.urlretrieve(url, filename) |
| return open(fn, *args, **kw) |
| |
| |
| class WarningMessage(object): |
| "Holds the result of the latest showwarning() call" |
| def __init__(self): |
| self.message = None |
| self.category = None |
| self.filename = None |
| self.lineno = None |
| |
| def _showwarning(self, message, category, filename, lineno, file=None): |
| self.message = message |
| self.category = category |
| self.filename = filename |
| self.lineno = lineno |
| |
| @contextlib.contextmanager |
| def catch_warning(): |
| """ |
| Guard the warnings filter from being permanently changed and record the |
| data of the last warning that has been issued. |
| |
| Use like this: |
| |
| with catch_warning() as w: |
| warnings.warn("foo") |
| assert str(w.message) == "foo" |
| """ |
| warning = WarningMessage() |
| original_filters = warnings.filters[:] |
| original_showwarning = warnings.showwarning |
| warnings.showwarning = warning._showwarning |
| try: |
| yield warning |
| finally: |
| warnings.showwarning = original_showwarning |
| warnings.filters = original_filters |
| |
| class EnvironmentVarGuard(object): |
| |
| """Class to help protect the environment variable properly. Can be used as |
| a context manager.""" |
| |
| def __init__(self): |
| self._environ = os.environ |
| self._unset = set() |
| self._reset = dict() |
| |
| def set(self, envvar, value): |
| if envvar not in self._environ: |
| self._unset.add(envvar) |
| else: |
| self._reset[envvar] = self._environ[envvar] |
| self._environ[envvar] = value |
| |
| def unset(self, envvar): |
| if envvar in self._environ: |
| self._reset[envvar] = self._environ[envvar] |
| del self._environ[envvar] |
| |
| def __enter__(self): |
| return self |
| |
| def __exit__(self, *ignore_exc): |
| for envvar, value in self._reset.items(): |
| self._environ[envvar] = value |
| for unset in self._unset: |
| del self._environ[unset] |
| |
| 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") |
| |
| |
| def transient_internet(): |
| """Return a context manager that raises ResourceDenied when various issues |
| with the Internet connection manifest themselves as exceptions.""" |
| time_out = TransientResource(IOError, errno=errno.ETIMEDOUT) |
| socket_peer_reset = TransientResource(socket.error, errno=errno.ECONNRESET) |
| ioerror_peer_reset = TransientResource(IOError, errno=errno.ECONNRESET) |
| return contextlib.nested(time_out, socket_peer_reset, ioerror_peer_reset) |
| |
| |
| @contextlib.contextmanager |
| def captured_output(stream_name): |
| """Run the 'with' statement body using a StringIO object in place of a |
| specific attribute on the sys module. |
| Example use (with 'stream_name=stdout'):: |
| |
| with captured_stdout() as s: |
| print "hello" |
| assert s.getvalue() == "hello" |
| """ |
| import io |
| orig_stdout = getattr(sys, stream_name) |
| setattr(sys, stream_name, io.StringIO()) |
| yield getattr(sys, stream_name) |
| setattr(sys, stream_name, orig_stdout) |
| |
| def captured_stdout(): |
| return captured_output("stdout") |
| |
| |
| #======================================================================= |
| # 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 |
| |
| #======================================================================= |
| # 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 |
| |
| MAX_Py_ssize_t = sys.maxsize |
| |
| def set_memlimit(limit): |
| import re |
| global 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()]) |
| 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, |
| independant 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.failIf(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 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 _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 = "errors occurred; 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) |
| |
| |
| #======================================================================= |
| # 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 |
| |
| def threading_setup(): |
| import threading |
| return len(threading._active), len(threading._limbo) |
| |
| def threading_cleanup(num_active, num_limbo): |
| import threading |
| import time |
| |
| _MAX_COUNT = 10 |
| count = 0 |
| while len(threading._active) != num_active and count < _MAX_COUNT: |
| count += 1 |
| time.sleep(0.1) |
| |
| count = 0 |
| while len(threading._limbo) != num_limbo and count < _MAX_COUNT: |
| count += 1 |
| time.sleep(0.1) |
| |
| 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 |