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# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'fcntl'
class TestReadPartial < Test::Unit::TestCase
def make_pipe
r, w = IO.pipe
r.binmode
w.binmode
begin
yield r, w
ensure
r.close unless r.closed?
w.close unless w.closed?
end
end
def pipe
make_pipe {|r, w|
yield r, w
}
return unless defined?(Fcntl::F_SETFL)
return unless defined?(Fcntl::F_GETFL)
return unless defined?(Fcntl::O_NONBLOCK)
make_pipe {|r, w|
r.fcntl(Fcntl::F_SETFL, r.fcntl(Fcntl::F_GETFL) | Fcntl::O_NONBLOCK)
yield r, w
}
end
def test_length_zero
pipe {|r, w|
assert_equal('', r.readpartial(0))
}
end
def test_closed_pipe
pipe {|r, w|
w << 'abc'
w.close
assert_equal('ab', r.readpartial(2))
assert_equal('c', r.readpartial(2))
assert_raise(EOFError) { r.readpartial(2) }
assert_raise(EOFError) { r.readpartial(2) }
}
end
def test_open_pipe
pipe {|r, w|
w << 'abc'
assert_equal('ab', r.readpartial(2))
assert_equal('c', r.readpartial(2))
assert_raise(Timeout::Error) {
Timeout.timeout(0.1) { r.readpartial(2) }
}
}
end
def test_with_stdio
pipe {|r, w|
w << "abc\ndef\n"
assert_equal("abc\n", r.gets)
w << "ghi\n"
assert_equal("de", r.readpartial(2))
assert_equal("f\n", r.readpartial(4096))
assert_equal("ghi\n", r.readpartial(4096))
assert_raise(Timeout::Error) {
Timeout.timeout(0.1) { r.readpartial(2) }
}
}
end
end
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