beforeEach(function () {
parser = new ArgumentParser({debug: true});
var subparsers = parser.addSubparsers({
title: 'subcommands',
dest: 'subcommand_name'
});
c1 = subparsers.addParser('c1', {aliases: ['co']});
c1.addArgument([ '-f', '--foo' ], {});
c1.addArgument([ '-b', '--bar' ], {});
c2 = subparsers.addParser('c2', {});
c2.addArgument([ '--baz' ], {});
});