271 lines
10 KiB
Python
271 lines
10 KiB
Python
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# Utilities for the pywin32 tests
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import sys
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import unittest
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import gc
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import winerror
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##
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## General purpose utilities for the test suite.
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##
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def int2long(val):
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"""return a long on py2k"""
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return val + 0x100000000 - 0x100000000
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# The test suite has lots of string constants containing binary data, but
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# the strings are used in various "bytes" contexts.
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def str2bytes(sval):
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if sys.version_info < (3,0) and isinstance(sval, str):
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sval = sval.decode("latin1")
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return sval.encode("latin1")
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# Sometimes we want to pass a string that should explicitly be treated as
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# a memory blob.
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def str2memory(sval):
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if sys.version_info < (3,0):
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return buffer(sval)
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# py3k.
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return memoryview(sval.encode("latin1"))
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# Sometimes we want to pass an object that exposes its memory
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def ob2memory(ob):
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if sys.version_info < (3,0):
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return buffer(ob)
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# py3k.
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return memoryview(ob)
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# Note: no str2unicode: we use u'' literals or unicode() function, and 2to3
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#
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##
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## unittest related stuff
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##
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# This is a specialized TestCase adaptor which wraps a real test.
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class LeakTestCase(unittest.TestCase):
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"""An 'adaptor' which takes another test. In debug builds we execute the
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test once to remove one-off side-effects, then capture the total
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reference count, then execute the test a few times. If the total
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refcount at the end is greater than we first captured, we have a leak!
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In release builds the test is executed just once, as normal.
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Generally used automatically by the test runner - you can safely
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ignore this.
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"""
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def __init__(self, real_test):
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unittest.TestCase.__init__(self)
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self.real_test = real_test
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self.num_test_cases = 1
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self.num_leak_iters = 2 # seems to be enough!
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if hasattr(sys, "gettotalrefcount"):
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self.num_test_cases = self.num_test_cases + self.num_leak_iters
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def countTestCases(self):
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return self.num_test_cases
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def __call__(self, result = None):
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# For the COM suite's sake, always ensure we don't leak
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# gateways/interfaces
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from pythoncom import _GetInterfaceCount, _GetGatewayCount
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gc.collect()
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ni = _GetInterfaceCount()
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ng = _GetGatewayCount()
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self.real_test(result)
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# Failed - no point checking anything else
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if result.shouldStop or not result.wasSuccessful():
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return
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self._do_leak_tests(result)
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gc.collect()
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lost_i = _GetInterfaceCount() - ni
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lost_g = _GetGatewayCount() - ng
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if lost_i or lost_g:
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msg = "%d interface objects and %d gateway objects leaked" \
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% (lost_i, lost_g)
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exc = AssertionError(msg)
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result.addFailure(self.real_test, (exc.__class__, exc, None))
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def runTest(self):
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assert 0, "not used"
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def _do_leak_tests(self, result = None):
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try:
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gtrc = sys.gettotalrefcount
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except AttributeError:
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return # can't do leak tests in this build
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# Assume already called once, to prime any caches etc
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gc.collect()
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trc = gtrc()
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for i in range(self.num_leak_iters):
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self.real_test(result)
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if result.shouldStop:
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break
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del i # created after we remembered the refcount!
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# int division here means one or 2 stray references won't force
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# failure, but one per loop
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gc.collect()
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lost = (gtrc() - trc) // self.num_leak_iters
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if lost < 0:
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msg = "LeakTest: %s appeared to gain %d references!!" % (self.real_test, -lost)
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result.addFailure(self.real_test, (AssertionError, msg, None))
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if lost > 0:
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msg = "LeakTest: %s lost %d references" % (self.real_test, lost)
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exc = AssertionError(msg)
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result.addFailure(self.real_test, (exc.__class__, exc, None))
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class TestLoader(unittest.TestLoader):
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def loadTestsFromTestCase(self, testCaseClass):
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"""Return a suite of all tests cases contained in testCaseClass"""
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leak_tests = []
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for name in self.getTestCaseNames(testCaseClass):
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real_test = testCaseClass(name)
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leak_test = self._getTestWrapper(real_test)
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leak_tests.append(leak_test)
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return self.suiteClass(leak_tests)
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def fixupTestsForLeakTests(self, test):
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if isinstance(test, unittest.TestSuite):
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test._tests = [self.fixupTestsForLeakTests(t) for t in test._tests]
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return test
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else:
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# just a normal test case.
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return self._getTestWrapper(test)
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def _getTestWrapper(self, test):
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# one or 2 tests in the COM test suite set this...
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no_leak_tests = getattr(test, "no_leak_tests", False)
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if no_leak_tests:
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print("Test says it doesn't want leak tests!")
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return test
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return LeakTestCase(test)
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def loadTestsFromModule(self, mod):
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if hasattr(mod, "suite"):
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tests = mod.suite()
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else:
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tests = unittest.TestLoader.loadTestsFromModule(self, mod)
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return self.fixupTestsForLeakTests(tests)
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def loadTestsFromName(self, name, module=None):
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test = unittest.TestLoader.loadTestsFromName(self, name, module)
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if isinstance(test, unittest.TestSuite):
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pass # hmmm? print "Don't wrap suites yet!", test._tests
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elif isinstance(test, unittest.TestCase):
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test = self._getTestWrapper(test)
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else:
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print("XXX - what is", test)
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return test
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# Lots of classes necessary to support one simple feature: we want a 3rd
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# test result state - "SKIPPED" - to indicate that the test wasn't able
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# to be executed for various reasons. Inspired by bzr's tests, but it
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# has other concepts, such as "Expected Failure", which we don't bother
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# with.
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# win32 error codes that probably mean we need to be elevated (ie, if we
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# aren't elevated, we treat these error codes as 'skipped')
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non_admin_error_codes = [winerror.ERROR_ACCESS_DENIED,
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winerror.ERROR_PRIVILEGE_NOT_HELD]
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_is_admin = None
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def check_is_admin():
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global _is_admin
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if _is_admin is None:
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from win32com.shell.shell import IsUserAnAdmin
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import pythoncom
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try:
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_is_admin = IsUserAnAdmin()
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except pythoncom.com_error as exc:
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if exc.hresult != winerror.E_NOTIMPL:
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raise
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# not impl on this platform - must be old - assume is admin
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_is_admin = True
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return _is_admin
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# If this exception is raised by a test, the test is reported as a 'skip'
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class TestSkipped(Exception):
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pass
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# The 'TestResult' subclass that records the failures and has the special
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# handling for the TestSkipped exception.
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class TestResult(unittest._TextTestResult):
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def __init__(self, *args, **kw):
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super(TestResult, self).__init__(*args, **kw)
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self.skips = {} # count of skips for each reason.
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def addError(self, test, err):
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"""Called when an error has occurred. 'err' is a tuple of values as
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returned by sys.exc_info().
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"""
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# translate a couple of 'well-known' exceptions into 'skipped'
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import pywintypes
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exc_val = err[1]
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# translate ERROR_ACCESS_DENIED for non-admin users to be skipped.
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# (access denied errors for an admin user aren't expected.)
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if isinstance(exc_val, pywintypes.error) \
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and exc_val.winerror in non_admin_error_codes \
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and not check_is_admin():
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exc_val = TestSkipped(exc_val)
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# and COM errors due to objects not being registered (the com test
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# suite will attempt to catch this and handle it itself if the user
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# is admin)
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elif isinstance(exc_val, pywintypes.com_error) and \
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exc_val.hresult in [winerror.CO_E_CLASSSTRING,
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winerror.REGDB_E_CLASSNOTREG,
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winerror.TYPE_E_LIBNOTREGISTERED]:
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exc_val = TestSkipped(exc_val)
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# NotImplemented generally means the platform doesn't support the
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# functionality.
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elif isinstance(exc_val, NotImplementedError):
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exc_val = TestSkipped(NotImplementedError)
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if isinstance(exc_val, TestSkipped):
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reason = exc_val.args[0]
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# if the reason itself is another exception, get its args.
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try:
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reason = tuple(reason.args)
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except (AttributeError, TypeError):
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pass
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self.skips.setdefault(reason, 0)
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self.skips[reason] += 1
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if self.showAll:
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self.stream.writeln("SKIP (%s)" % (reason,))
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elif self.dots:
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self.stream.write('S')
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self.stream.flush()
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return
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super(TestResult, self).addError(test, err)
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def printErrors(self):
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super(TestResult, self).printErrors()
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for reason, num_skipped in self.skips.items():
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self.stream.writeln("SKIPPED: %d tests - %s" % (num_skipped, reason))
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# TestRunner subclass necessary just to get our TestResult hooked up.
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class TestRunner(unittest.TextTestRunner):
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def _makeResult(self):
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return TestResult(self.stream, self.descriptions, self.verbosity)
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# TestProgream subclass necessary just to get our TestRunner hooked up,
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# which is necessary to get our TestResult hooked up *sob*
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class TestProgram(unittest.TestProgram):
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def runTests(self):
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# clobber existing runner - *sob* - it shouldn't be this hard
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self.testRunner = TestRunner(verbosity=self.verbosity)
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unittest.TestProgram.runTests(self)
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# A convenient entry-point - if used, 'SKIPPED' exceptions will be supressed.
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def testmain(*args, **kw):
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new_kw = kw.copy()
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if 'testLoader' not in new_kw:
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new_kw['testLoader'] = TestLoader()
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program_class = new_kw.get('testProgram', TestProgram)
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program_class(*args, **new_kw)
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