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32910b8781
Too many machines lack entropy to have a usable /dev/random. I had similar problems on my system until I started using haveged(8), but we can't require that for CI. cf. https://rubyci.org/logs/rubyci.s3.amazonaws.com/debian/ruby-trunk/log/20180825T213003Z.fail.html.gz git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64540 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
78 lines
2.1 KiB
Ruby
78 lines
2.1 KiB
Ruby
# frozen_string_literal: true
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require 'test/unit'
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require 'io/wait'
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# test uncommon device types to check portability problems
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# We may optimize IO#wait_*able for non-Linux kernels in the future
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class TestIOWaitUncommon < Test::Unit::TestCase
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def test_tty_wait
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begin
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tty = File.open('/dev/tty', 'w+')
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rescue Errno::ENOENT, Errno::ENXIO => e
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skip "/dev/tty: #{e.message} (#{e.class})"
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end
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assert_include [ nil, tty ], tty.wait_readable(0)
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assert_equal tty, tty.wait_writable(1), 'portability test'
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ensure
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tty&.close
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end
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def test_fifo_wait
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skip 'no mkfifo' unless File.respond_to?(:mkfifo) && IO.const_defined?(:NONBLOCK)
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Dir.mktmpdir('rubytest-fifo') do |dir|
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fifo = "#{dir}/fifo"
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assert_equal 0, File.mkfifo(fifo)
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rd = Thread.new { File.open(fifo, IO::RDONLY|IO::NONBLOCK) }
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begin
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wr = File.open(fifo, IO::WRONLY|IO::NONBLOCK)
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rescue Errno::ENXIO
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Thread.pass
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end until wr
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assert_instance_of File, rd.value
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assert_instance_of File, wr
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rd = rd.value
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assert_nil rd.wait_readable(0)
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assert_same wr, wr.wait_writable(0)
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wr.syswrite 'hi'
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assert_same rd, rd.wait_readable(1)
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wr.close
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assert_equal 'hi', rd.gets
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rd.close
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end
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end
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# used to find portability problems because some ppoll implementations
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# are incomplete and do not work for certain "file" types
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def check_dev(dev, m = :wait_readable)
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begin
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fp = File.open("/dev/#{dev}", m == :wait_readable ? 'r' : 'w')
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rescue SystemCallError => e
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skip "#{dev} could not be opened #{e.message} (#{e.class})"
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end
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assert_same fp, fp.__send__(m)
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ensure
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fp&.close
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end
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def test_wait_readable_urandom
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check_dev 'urandom'
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end
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def test_wait_readable_random
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File.open('/dev/random') do |fp|
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assert_nothing_raised do
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fp.wait_readable(0)
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end
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end
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rescue SystemCallError => e
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skip "/dev/random could not be opened #{e.message} (#{e.class})"
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end
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def test_wait_readable_zero
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check_dev 'zero'
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end
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def test_wait_writable_null
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check_dev 'null', :wait_writable
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end
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end
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