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require 'test/unit'
class TestOldThreadSelect < Test::Unit::TestCase
require '-test-/old_thread_select/old_thread_select'
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_old_select_read_timeout
with_pipe do |r, w|
t0 = Time.now
rc = IO.old_thread_select([r.fileno], nil, nil, 0.001)
diff = Time.now - t0
assert_equal 0, rc
assert diff > 0.001, "returned too early"
end
end
def test_old_select_read_write_check
with_pipe do |r, w|
w.syswrite('.')
rc = IO.old_thread_select([r.fileno], nil, nil, nil)
assert_equal 1, rc
rc = IO.old_thread_select([r.fileno], [w.fileno], nil, nil)
assert_equal 2, rc
assert_equal '.', r.read(1)
rc = IO.old_thread_select([r.fileno], [w.fileno], nil, nil)
assert_equal 1, rc
end
end
def test_old_select_signal_safe
return unless Process.respond_to?(:kill)
usr1 = false
trap(:USR1) { usr1 = true }
main = Thread.current
thr = Thread.new do
Thread.pass until main.stop?
Process.kill(:USR1, $$)
true
end
rc = nil
t0 = Time.now
with_pipe do |r,w|
assert_nothing_raised do
rc = IO.old_thread_select([r.fileno], nil, nil, 1)
end
end
diff = Time.now - t0
assert diff >= 1.0, "interrupted or short wait"
assert_equal 0, rc
assert_equal true, thr.value
assert usr1, "USR1 not received"
ensure
trap(:USR1, "DEFAULT")
end
end
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