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# Test the Windows-only _winapi module
import os
import pathlib
import re
import unittest
from test.support import import_helper, os_helper
_winapi = import_helper.import_module('_winapi', required_on=['win'])
MAXIMUM_WAIT_OBJECTS = 64
MAXIMUM_BATCHED_WAIT_OBJECTS = (MAXIMUM_WAIT_OBJECTS - 1) ** 2
class WinAPIBatchedWaitForMultipleObjectsTests(unittest.TestCase):
def _events_waitall_test(self, n):
evts = [_winapi.CreateEventW(0, False, False, None) for _ in range(n)]
with self.assertRaises(TimeoutError):
_winapi.BatchedWaitForMultipleObjects(evts, True, 100)
# Ensure no errors raised when all are triggered
for e in evts:
_winapi.SetEvent(e)
try:
_winapi.BatchedWaitForMultipleObjects(evts, True, 100)
except TimeoutError:
self.fail("expected wait to complete immediately")
# Choose 8 events to set, distributed throughout the list, to make sure
# we don't always have them in the first chunk
chosen = [i * (len(evts) // 8) for i in range(8)]
# Replace events with invalid handles to make sure we fail
for i in chosen:
old_evt = evts[i]
evts[i] = -1
with self.assertRaises(OSError):
_winapi.BatchedWaitForMultipleObjects(evts, True, 100)
evts[i] = old_evt
def _events_waitany_test(self, n):
evts = [_winapi.CreateEventW(0, False, False, None) for _ in range(n)]
with self.assertRaises(TimeoutError):
_winapi.BatchedWaitForMultipleObjects(evts, False, 100)
# Choose 8 events to set, distributed throughout the list, to make sure
# we don't always have them in the first chunk
chosen = [i * (len(evts) // 8) for i in range(8)]
# Trigger one by one. They are auto-reset events, so will only trigger once
for i in chosen:
with self.subTest(f"trigger event {i} of {len(evts)}"):
_winapi.SetEvent(evts[i])
triggered = _winapi.BatchedWaitForMultipleObjects(evts, False, 10000)
self.assertSetEqual(set(triggered), {i})
# Trigger all at once. This may require multiple calls
for i in chosen:
_winapi.SetEvent(evts[i])
triggered = set()
while len(triggered) < len(chosen):
triggered.update(_winapi.BatchedWaitForMultipleObjects(evts, False, 10000))
self.assertSetEqual(triggered, set(chosen))
# Replace events with invalid handles to make sure we fail
for i in chosen:
with self.subTest(f"corrupt event {i} of {len(evts)}"):
old_evt = evts[i]
evts[i] = -1
with self.assertRaises(OSError):
_winapi.BatchedWaitForMultipleObjects(evts, False, 100)
evts[i] = old_evt
def test_few_events_waitall(self):
self._events_waitall_test(16)
def test_many_events_waitall(self):
self._events_waitall_test(256)
def test_max_events_waitall(self):
self._events_waitall_test(MAXIMUM_BATCHED_WAIT_OBJECTS)
def test_few_events_waitany(self):
self._events_waitany_test(16)
def test_many_events_waitany(self):
self._events_waitany_test(256)
def test_max_events_waitany(self):
self._events_waitany_test(MAXIMUM_BATCHED_WAIT_OBJECTS)
class WinAPITests(unittest.TestCase):
def test_getlongpathname(self):
testfn = pathlib.Path(os.getenv("ProgramFiles")).parents[-1] / "PROGRA~1"
if not os.path.isdir(testfn):
raise unittest.SkipTest("require x:\\PROGRA~1 to test")
# pathlib.Path will be rejected - only str is accepted
with self.assertRaises(TypeError):
_winapi.GetLongPathName(testfn)
actual = _winapi.GetLongPathName(os.fsdecode(testfn))
# Can't assume that PROGRA~1 expands to any particular variation, so
# ensure it matches any one of them.
candidates = set(testfn.parent.glob("Progra*"))
self.assertIn(pathlib.Path(actual), candidates)
def test_getshortpathname(self):
testfn = pathlib.Path(os.getenv("ProgramFiles"))
if not os.path.isdir(testfn):
raise unittest.SkipTest("require '%ProgramFiles%' to test")
# pathlib.Path will be rejected - only str is accepted
with self.assertRaises(TypeError):
_winapi.GetShortPathName(testfn)
actual = _winapi.GetShortPathName(os.fsdecode(testfn))
# Should contain "PROGRA~" but we can't predict the number
self.assertIsNotNone(re.match(r".\:\\PROGRA~\d", actual.upper()), actual)
def test_namedpipe(self):
pipe_name = rf"\\.\pipe\LOCAL\{os_helper.TESTFN}"
# Pipe does not exist, so this raises
with self.assertRaises(FileNotFoundError):
_winapi.WaitNamedPipe(pipe_name, 0)
pipe = _winapi.CreateNamedPipe(
pipe_name,
_winapi.PIPE_ACCESS_DUPLEX,
8, # 8=PIPE_REJECT_REMOTE_CLIENTS
2, # two instances available
32, 32, 0, 0)
self.addCleanup(_winapi.CloseHandle, pipe)
# Pipe instance is available, so this passes
_winapi.WaitNamedPipe(pipe_name, 0)
with open(pipe_name, 'w+b') as pipe2:
# No instances available, so this times out
# (WinError 121 does not get mapped to TimeoutError)
with self.assertRaises(OSError):
_winapi.WaitNamedPipe(pipe_name, 0)
_winapi.WriteFile(pipe, b'testdata')
self.assertEqual(b'testdata', pipe2.read(8))
self.assertEqual((b'', 0), _winapi.PeekNamedPipe(pipe, 8)[:2])
pipe2.write(b'testdata')
pipe2.flush()
self.assertEqual((b'testdata', 8), _winapi.PeekNamedPipe(pipe, 8)[:2])
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