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begin
  require "readline"
rescue LoadError
end

if defined?(Readline) && !/EditLine/n.match(Readline::VERSION)

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("> ", true)
      }
      assert_equal("hello", line)
      assert_equal(true, line.tainted?)
      stdout.open
      assert_equal("> ", stdout.read(2))
      assert_equal(1, Readline::HISTORY.length)
      assert_equal("hello", Readline::HISTORY[0])
      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
    begin
      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)
    rescue NotImplementedError
    end
  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
      Readline.input = STDIN
      Readline.output = STDOUT
      yield
    ensure
      STDIN.reopen(orig_stdin)
      STDOUT.reopen(orig_stdout)
      orig_stdin.close
      orig_stdout.close
    end
  end
end

end