mirror of https://github.com/python/cpython
116 lines
3.5 KiB
Python
116 lines
3.5 KiB
Python
# Test case for the select.devpoll() function
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# Initial tests are copied as is from "test_poll.py"
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import os, select, random, unittest, sys
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from test.support import TESTFN, run_unittest, cpython_only
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try:
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select.devpoll
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except AttributeError:
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raise unittest.SkipTest("select.devpoll not defined -- skipping test_devpoll")
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def find_ready_matching(ready, flag):
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match = []
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for fd, mode in ready:
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if mode & flag:
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match.append(fd)
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return match
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class DevPollTests(unittest.TestCase):
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def test_devpoll1(self):
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# Basic functional test of poll object
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# Create a bunch of pipe and test that poll works with them.
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p = select.devpoll()
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NUM_PIPES = 12
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MSG = b" This is a test."
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MSG_LEN = len(MSG)
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readers = []
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writers = []
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r2w = {}
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w2r = {}
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for i in range(NUM_PIPES):
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rd, wr = os.pipe()
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p.register(rd)
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p.modify(rd, select.POLLIN)
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p.register(wr, select.POLLOUT)
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readers.append(rd)
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writers.append(wr)
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r2w[rd] = wr
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w2r[wr] = rd
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bufs = []
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while writers:
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ready = p.poll()
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ready_writers = find_ready_matching(ready, select.POLLOUT)
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if not ready_writers:
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self.fail("no pipes ready for writing")
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wr = random.choice(ready_writers)
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os.write(wr, MSG)
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ready = p.poll()
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ready_readers = find_ready_matching(ready, select.POLLIN)
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if not ready_readers:
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self.fail("no pipes ready for reading")
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self.assertEqual([w2r[wr]], ready_readers)
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rd = ready_readers[0]
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buf = os.read(rd, MSG_LEN)
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self.assertEqual(len(buf), MSG_LEN)
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bufs.append(buf)
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os.close(r2w[rd]) ; os.close(rd)
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p.unregister(r2w[rd])
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p.unregister(rd)
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writers.remove(r2w[rd])
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self.assertEqual(bufs, [MSG] * NUM_PIPES)
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def test_timeout_overflow(self):
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pollster = select.devpoll()
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w, r = os.pipe()
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pollster.register(w)
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pollster.poll(-1)
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self.assertRaises(OverflowError, pollster.poll, -2)
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self.assertRaises(OverflowError, pollster.poll, -1 << 31)
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self.assertRaises(OverflowError, pollster.poll, -1 << 64)
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pollster.poll(0)
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pollster.poll(1)
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pollster.poll(1 << 30)
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self.assertRaises(OverflowError, pollster.poll, 1 << 31)
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self.assertRaises(OverflowError, pollster.poll, 1 << 63)
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self.assertRaises(OverflowError, pollster.poll, 1 << 64)
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def test_events_mask_overflow(self):
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pollster = select.devpoll()
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w, r = os.pipe()
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pollster.register(w)
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# Issue #17919
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self.assertRaises(OverflowError, pollster.register, 0, -1)
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self.assertRaises(OverflowError, pollster.register, 0, 1 << 64)
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self.assertRaises(OverflowError, pollster.modify, 1, -1)
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self.assertRaises(OverflowError, pollster.modify, 1, 1 << 64)
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@cpython_only
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def test_events_mask_overflow_c_limits(self):
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from _testcapi import USHRT_MAX
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pollster = select.devpoll()
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w, r = os.pipe()
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pollster.register(w)
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# Issue #17919
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self.assertRaises(OverflowError, pollster.register, 0, USHRT_MAX + 1)
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self.assertRaises(OverflowError, pollster.modify, 1, USHRT_MAX + 1)
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def test_main():
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run_unittest(DevPollTests)
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if __name__ == '__main__':
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test_main()
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