From: Robert Klemme <shortcutter@...>
Date: 2010-04-22T21:44:52+09:00
Subject: Re: Test::Unit examples and OptionParser

2010/4/22 Martin Hansen <mail@maasha.dk>:
> I am looking for a stack of unit tests examples to check the behavior of
> OptionParser for parsing command line options, such as:
>
>
> [option]:
>  --help
>  --output_file
>  --cutoff_value
>  --list_of_keys
>  --verbose

What exactly do you expect?  Do you want to test whether OptionParser
works properly or do you want to test your option spec?  For the
former you'll likely find tests where OptionParser sources are.  For
the latter you will have to provide different argument lists to OP and
see whether it works as intended, e.g.

require 'optparse'

def my_parse(argv)
  options = {}

  OptionParser.new do |opts|
    opts.on '--help' do |val|
      options[:help] = val
    end
  end.parse! argv

  options
end

[
  [[], [], {}],
  [%w{--help}, [], {:help => true}],
].each do |inp, outp, opts|
  printf "%-30s argv=%p\n", "before", inp
  options = my_parse inp
  printf "%-30s argv=%p options=%p\n", "after", inp, options
  puts "options ok #{opts == options}",
    "argv ok #{outp == inp}"
end

Kind regards

robert

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