kopia lustrzana https://github.com/micropython/micropython
57 wiersze
1.4 KiB
Python
57 wiersze
1.4 KiB
Python
# Test select.poll in combination with file descriptors.
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try:
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import select, errno
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select.poll # Raises AttributeError for CPython implementations without poll()
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except (ImportError, AttributeError):
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print("SKIP")
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raise SystemExit
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# Check that poll supports registering file descriptors (integers).
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try:
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select.poll().register(0)
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except OSError:
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print("SKIP")
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raise SystemExit
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# Register invalid file descriptor.
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try:
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select.poll().register(-1)
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except ValueError:
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print("ValueError")
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# Test polling stdout, it should be writable.
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poller = select.poll()
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poller.register(1)
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poller.modify(1, select.POLLOUT)
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print(poller.poll())
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# Unregister then re-register.
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poller.unregister(1)
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poller.register(1, select.POLLIN)
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# Poll for input, should return an empty list.
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print(poller.poll(0))
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# Test registering a very large number of file descriptors (will trigger
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# EINVAL due to more than OPEN_MAX fds). Typically it's 1024 (and on GitHub CI
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# we force this via `ulimit -n 1024`).
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poller = select.poll()
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for fd in range(6000):
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poller.register(fd)
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try:
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poller.poll()
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assert False
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except OSError as er:
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print(er.errno == errno.EINVAL)
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# Register stdout/stderr, plus many extra ones to trigger the fd vector
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# resizing. Then unregister the excess ones and verify poll still works.
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poller = select.poll()
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for fd in range(1, 1000):
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poller.register(fd)
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for i in range(3, 1000):
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poller.unregister(i)
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print(sorted(poller.poll()))
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