# File test/test_multi_process.rb, line 27
    def test_pipe
      if (pid = fork) then
        @s2.close
        @s1.write('HALO S2')
        assert_equal('HALO S1', @s1.read(7))
      else
        @s1.close
        assert_equal('HALO S2', @s2.read(7))
        @s2.write('HALO S1')
        exit!(0)
      end
      assert_equal(0, Process.waitpid2(pid)[1].exitstatus)
    end