summaryrefslogtreecommitdiff
path: root/test/ruby/test_readpartial.rb
blob: c4f9d193f26c748ddc41934a16c710ff98410988 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
require 'test/unit'
require 'timeout'
require 'fcntl'

class TestReadPartial < Test::Unit::TestCase
  def make_pipe
    r, w = IO.pipe
    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_raises(EOFError) { r.readpartial(2) }
      assert_raises(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_raises(TimeoutError) {
        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_raises(TimeoutError) {
        timeout(0.1) { r.readpartial(2) }
      }
    }
  end
end