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"""Tests for window_utils"""
import sys
import unittest
import warnings
if sys.platform != 'win32':
raise unittest.SkipTest('Windows only')
import _overlapped
import _winapi
import asyncio
from asyncio import windows_utils
from test import support
def tearDownModule():
asyncio.events._set_event_loop_policy(None)
class PipeTests(unittest.TestCase):
def test_pipe_overlapped(self):
h1, h2 = windows_utils.pipe(overlapped=(True, True))
try:
ov1 = _overlapped.Overlapped()
self.assertFalse(ov1.pending)
self.assertEqual(ov1.error, 0)
ov1.ReadFile(h1, 100)
self.assertTrue(ov1.pending)
self.assertEqual(ov1.error, _winapi.ERROR_IO_PENDING)
ERROR_IO_INCOMPLETE = 996
try:
ov1.getresult()
except OSError as e:
self.assertEqual(e.winerror, ERROR_IO_INCOMPLETE)
else:
raise RuntimeError('expected ERROR_IO_INCOMPLETE')
ov2 = _overlapped.Overlapped()
self.assertFalse(ov2.pending)
self.assertEqual(ov2.error, 0)
ov2.WriteFile(h2, b"hello")
self.assertIn(ov2.error, {0, _winapi.ERROR_IO_PENDING})
res = _winapi.WaitForMultipleObjects([ov2.event], False, 100)
self.assertEqual(res, _winapi.WAIT_OBJECT_0)
self.assertFalse(ov1.pending)
self.assertEqual(ov1.error, ERROR_IO_INCOMPLETE)
self.assertFalse(ov2.pending)
self.assertIn(ov2.error, {0, _winapi.ERROR_IO_PENDING})
self.assertEqual(ov1.getresult(), b"hello")
finally:
_winapi.CloseHandle(h1)
_winapi.CloseHandle(h2)
def test_pipe_handle(self):
h, _ = windows_utils.pipe(overlapped=(True, True))
_winapi.CloseHandle(_)
p = windows_utils.PipeHandle(h)
self.assertEqual(p.fileno(), h)
self.assertEqual(p.handle, h)
# check garbage collection of p closes handle
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "", ResourceWarning)
del p
support.gc_collect()
try:
_winapi.CloseHandle(h)
except OSError as e:
self.assertEqual(e.winerror, 6) # ERROR_INVALID_HANDLE
else:
raise RuntimeError('expected ERROR_INVALID_HANDLE')
class PopenTests(unittest.TestCase):
def test_popen(self):
command = r"""if 1:
import sys
s = sys.stdin.readline()
sys.stdout.write(s.upper())
sys.stderr.write('stderr')
"""
msg = b"blah\n"
p = windows_utils.Popen([sys.executable, '-c', command],
stdin=windows_utils.PIPE,
stdout=windows_utils.PIPE,
stderr=windows_utils.PIPE)
for f in [p.stdin, p.stdout, p.stderr]:
self.assertIsInstance(f, windows_utils.PipeHandle)
ovin = _overlapped.Overlapped()
ovout = _overlapped.Overlapped()
overr = _overlapped.Overlapped()
ovin.WriteFile(p.stdin.handle, msg)
ovout.ReadFile(p.stdout.handle, 100)
overr.ReadFile(p.stderr.handle, 100)
events = [ovin.event, ovout.event, overr.event]
# Super-long timeout for slow buildbots.
res = _winapi.WaitForMultipleObjects(events, True,
int(support.SHORT_TIMEOUT * 1000))
self.assertEqual(res, _winapi.WAIT_OBJECT_0)
self.assertFalse(ovout.pending)
self.assertFalse(overr.pending)
self.assertFalse(ovin.pending)
self.assertEqual(ovin.getresult(), len(msg))
out = ovout.getresult().rstrip()
err = overr.getresult().rstrip()
self.assertGreater(len(out), 0)
self.assertGreater(len(err), 0)
# allow for partial reads...
self.assertStartsWith(msg.upper().rstrip(), out)
self.assertStartsWith(b"stderr", err)
# The context manager calls wait() and closes resources
with p:
pass
if __name__ == '__main__':
unittest.main()
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