baf 0.15.1

Baf

baf helps writing an user acceptance test suite with a dedicated library and cucumber steps. It can run and wait for programs in a modified environment, verify the exit status, the output streams and other side effects. It also supports interactive programs and writing to their standard input.

Then, it provides a DSL to write the CLI:

require 'baf/cli'

module MyProgram
  class CLI < Baf::CLI
    def setup
      flag_version '0.1.2'.freeze

      option :c, :config, 'config', 'specify config file' do |path|
        @config_path = path
      end
    end

    def run
      usage! unless arguments.any?

      puts 'arguments: %s' % arguments
      puts 'config: %s' % @config_path if @config_path
    end
  end
end

MyProgram::CLI.run ARGV

Which behaves this way:

% ./my_program
Usage: my_program [options]

options:
    -c, --config config              specify config file

    -h, --help                       print this message
    -V, --version                    print version
zsh: exit 64    ./my_program

% ./my_program --wrong-arg
Usage: my_program [options]

options:
    -c, --config config              specify config file

    -h, --help                       print this message
    -V, --version                    print version
zsh: exit 64    ./my_program --wrong-arg

% ./my_program foo
arguments ["foo"]

% ./my_program -c some_file foo
arguments ["foo"]
config path some_file