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# frozen_string_literal: false
require 'test/unit'
class TestWaitForSingleFD < Test::Unit::TestCase
require '-test-/wait_for_single_fd'
def with_pipe
r, w = IO.pipe
begin
yield r, w
ensure
r.close unless r.closed?
w.close unless w.closed?
end
end
def test_wait_for_valid_fd
with_pipe do |r,w|
rc = IO.wait_for_single_fd(w.fileno, RB_WAITFD_OUT, nil)
assert_equal RB_WAITFD_OUT, rc
end
end
def test_wait_for_invalid_fd
# Negative FDs should not cause NoMemoryError or segfault when
# using select(). For now, match the poll() implementation
# used on Linux, which sleeps the given amount of time given
# when fd is negative (as documented in the Linux poll(2) manpage)
assert_equal 0, IO.wait_for_single_fd(-999, RB_WAITFD_IN, 0)
assert_equal 0, IO.wait_for_single_fd(-1, RB_WAITFD_OUT, 0)
# FreeBSD 8.2 or prior sticks this
# http://bugs.ruby-lang.org/issues/5524
if /freebsd([\d\.]+)/ =~ RUBY_PLATFORM
ver = $1.to_r
skip 'FreeBSD <= 8.2' if ver <= 8.2r
end
with_pipe do |r,w|
wfd = w.fileno
w.close
assert_raise(Errno::EBADF) do
IO.wait_for_single_fd(wfd, RB_WAITFD_OUT, nil)
end
end
end
def test_wait_for_closed_pipe
with_pipe do |r,w|
w.close
rc = IO.wait_for_single_fd(r.fileno, RB_WAITFD_IN, nil)
assert_equal RB_WAITFD_IN, rc
end
end
def test_wait_for_kqueue
skip 'no kqueue' unless IO.respond_to?(:kqueue_test_wait)
assert_equal RB_WAITFD_IN, IO.kqueue_test_wait
end
end
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