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# -*- coding: us-ascii -*-
# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'socket'
# For `IO#ready?` and `IO#nread`:
require 'io/wait'
class TestIOWait < Test::Unit::TestCase
def setup
if /mswin|mingw/ =~ RUBY_PLATFORM
@r, @w = Socket.pair(Socket::AF_INET, Socket::SOCK_STREAM, 0)
else
@r, @w = IO.pipe
end
end
def teardown
@r.close unless @r.closed?
@w.close unless @w.closed?
end
def test_nread
assert_equal 0, @r.nread
@w.syswrite "."
sleep 0.1
assert_equal 1, @r.nread
end
def test_nread_buffered
@w.syswrite ".\n!"
assert_equal ".\n", @r.gets
assert_equal 1, @r.nread
end
def test_ready?
omit 'unstable on MinGW' if /mingw/ =~ RUBY_PLATFORM
assert_not_predicate @r, :ready?, "shouldn't ready, but ready"
@w.syswrite "."
sleep 0.1
assert_predicate @r, :ready?, "should ready, but not"
end
def test_buffered_ready?
@w.syswrite ".\n!"
assert_equal ".\n", @r.gets
assert_predicate @r, :ready?
end
def test_wait
omit 'unstable on MinGW' if /mingw/ =~ RUBY_PLATFORM
assert_nil @r.wait(0)
@w.syswrite "."
sleep 0.1
assert_equal @r, @r.wait(0)
end
def test_wait_buffered
@w.syswrite ".\n!"
assert_equal ".\n", @r.gets
assert_equal true, @r.wait(0)
end
def test_wait_forever
q = Thread::Queue.new
th = Thread.new { q.pop; @w.syswrite "." }
q.push(true)
assert_equal @r, @r.wait
ensure
th.join
end
def test_wait_eof
q = Thread::Queue.new
th = Thread.new { q.pop; @w.close }
ret = nil
assert_nothing_raised(Timeout::Error) do
q.push(true)
t = EnvUtil.apply_timeout_scale(0.1)
Timeout.timeout(t) { ret = @r.wait }
end
assert_equal @r, ret
ensure
th.join
end
def test_wait_readable
assert_nil @r.wait_readable(0)
@w.syswrite "."
IO.select([@r])
assert_equal @r, @r.wait_readable(0)
end
def test_wait_readable_buffered
@w.syswrite ".\n!"
assert_equal ".\n", @r.gets
assert_equal true, @r.wait_readable(0)
end
def test_wait_readable_forever
q = Thread::Queue.new
th = Thread.new { q.pop; @w.syswrite "." }
q.push(true)
assert_equal @r, @r.wait_readable
ensure
th.join
end
def test_wait_readable_eof
q = Thread::Queue.new
th = Thread.new { q.pop; @w.close }
ret = nil
assert_nothing_raised(Timeout::Error) do
q.push(true)
t = EnvUtil.apply_timeout_scale(0.1)
Timeout.timeout(t) { ret = @r.wait_readable }
end
assert_equal @r, ret
ensure
th.join
end
def test_wait_writable
assert_equal @w, @w.wait_writable
end
def test_wait_writable_timeout
assert_equal @w, @w.wait_writable(0.01)
written = fill_pipe
assert_nil @w.wait_writable(0.01)
@r.read(written)
assert_equal @w, @w.wait_writable(0.01)
end
def test_wait_writable_EPIPE
fill_pipe
@r.close
assert_equal @w, @w.wait_writable
end
def test_wait_writable_closed
@w.close
assert_raise(IOError) { @w.wait_writable }
end
def test_wait_readwrite
assert_equal @r.wait(0, :write), @r.wait(0, :read_write)
end
def test_wait_readwrite_timeout
assert_equal @w, @w.wait(0.01, :read_write)
written = fill_pipe
if /aix/ =~ RUBY_PLATFORM
# IO#wait internally uses select(2) on AIX.
# AIX's select(2) returns "readable" for the write-side fd
# of a pipe, so @w.wait(0.01, :read_write) does not return nil.
assert_equal @w, @w.wait(0.01, :read_write)
else
assert_nil @w.wait(0.01, :read_write)
end
@r.read(written)
assert_equal @w, @w.wait(0.01, :read_write)
end
def test_wait_mask_writable
omit("Missing IO::WRITABLE!") unless IO.const_defined?(:WRITABLE)
assert_equal IO::WRITABLE, @w.wait(IO::WRITABLE, 0)
end
def test_wait_mask_readable
omit("Missing IO::READABLE!") unless IO.const_defined?(:READABLE)
@w.write("Hello World\n" * 3)
assert_equal IO::READABLE, @r.wait(IO::READABLE, 0)
@r.gets
assert_equal IO::READABLE, @r.wait(IO::READABLE, 0)
end
def test_wait_mask_zero
omit("Missing IO::WRITABLE!") unless IO.const_defined?(:WRITABLE)
assert_raise(ArgumentError) do
@w.wait(0, 0)
end
end
def test_wait_mask_negative
omit("Missing IO::WRITABLE!") unless IO.const_defined?(:WRITABLE)
assert_raise(ArgumentError) do
@w.wait(-6, 0)
end
end
private
def fill_pipe
written = 0
buf = " " * 4096
begin
written += @w.write_nonblock(buf)
rescue Errno::EAGAIN, Errno::EWOULDBLOCK
return written
end while true
end
def sleep(time)
super EnvUtil.apply_timeout_scale(time)
end
end if IO.method_defined?(:wait)
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