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45 lines
1.0 KiB
45 lines
1.0 KiB
1 year ago
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# 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.
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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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except OSError as er:
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print(er.errno == errno.EINVAL)
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