begin
  require "readline"
rescue LoadError
end

if defined?(Readline)

require "test/unit"
require "tempfile"

class TestReadline < Test::Unit::TestCase
  def test_readline
    stdin = Tempfile.new("test_readline_stdin")
    stdout = Tempfile.new("test_readline_stdout")
    begin
      stdin.write("hello\n")
      stdin.close
      stdout.close
      line = replace_stdio(stdin.path, stdout.path) { Readline.readline("> ") }
      assert_equal("hello", line)
      assert_equal(true, line.tainted?)
      stdout.open
      assert_equal("> ", stdout.read(2))
      assert_raises(SecurityError) do
        Thread.start {
          $SAFE = 1
          replace_stdio(stdin.path, stdout.path) do
            Readline.readline("> ".taint)
          end
        }.join
      end
      assert_raises(SecurityError) do
        Thread.start {
          $SAFE = 4
          replace_stdio(stdin.path, stdout.path) { Readline.readline("> ") }
        }.join
      end
    ensure
      stdin.close(true)
      stdout.close(true)
    end
  end

  def test_completion_append_character
    Readline.completion_append_character = "x"
    assert_equal("x", Readline.completion_append_character)
    Readline.completion_append_character = "xyz"
    assert_equal("x", Readline.completion_append_character)
    Readline.completion_append_character = nil
    assert_equal(nil, Readline.completion_append_character)
    Readline.completion_append_character = ""
    assert_equal(nil, Readline.completion_append_character)
  end

  private

  def replace_stdio(stdin_path, stdout_path)
    orig_stdin = STDIN.dup
    orig_stdout = STDOUT.dup
    STDIN.reopen(stdin_path, "r")
    STDOUT.reopen(stdout_path, "w")
    begin
      yield
    ensure
      STDIN.reopen(orig_stdin)
      STDOUT.reopen(orig_stdout)
      orig_stdin.close
      orig_stdout.close
    end
  end
end

end