$ gem install cmd_line_test

If you are about to start writing new command line utility MyCommandLineApp, you probably want to specify its options and behavior, likely in form of tests. This gem is aimed to simplify creation of such tests:

requrie 'cmd_line_test'

class CliTest < Test::Unit::TestCase
  run_command_line_as {MyCommandLineApp.run}

  run_with_argv "--help" do
    assert_successful_run
    assert_out_contains /Usage:/
  end
end

Only tested on the 1.8.7 Ruby implementation and with Shoulda 2.10.1

cmd_line_test is released under the MIT license.