1require 'test/unit'
2require_relative 'envutil'
3
4class TestFlip < Test::Unit::TestCase
5  def test_hidden_key
6    bug6899 = '[ruby-core:47253]'
7    foo = "foor"
8    bar = "bar"
9    assert_nothing_raised(NotImplementedError, bug6899) do
10      2000.times {eval %[(foo..bar) ? 1 : 2]}
11    end
12  end
13
14  def test_shared_eval
15    bug7671 = '[ruby-core:51296]'
16    vs = (1..9).to_a
17    vs.select {|n| if n==2..n==16 then 1 end}
18    v = eval("vs.select {|n| if n==3..n==6 then 1 end}")
19    assert_equal([*3..6], v, bug7671)
20  end
21
22  def test_shared_thread
23    ff = proc {|n| true if n==3..n==5}
24    v = 1..9
25    a = true
26    th = Thread.new {
27      v.select {|i|
28        Thread.pass while a
29        ff[i].tap {a = true}
30      }
31    }
32    v1 = v.select {|i|
33      Thread.pass until a
34      ff[i].tap {a = false}
35    }
36    v2 = th.value
37    expected = [3, 4, 5]
38    mesg = 'flip-flop should be separated per threads'
39    assert_equal(expected, v1, mesg)
40    assert_equal(expected, v2, mesg)
41  end
42end
43