module cli fn test_help_message() { mut cmd := Command{ name: 'command' description: 'description' commands: [ Command{ name: 'sub' description: 'subcommand' }, Command{ name: 'sub2' description: 'another subcommand' }, ] flags: [ Flag{ flag: .string name: 'str' description: 'str flag' }, Flag{ flag: .bool name: 'bool' description: 'bool flag' abbrev: 'b' }, Flag{ flag: .string name: 'required' abbrev: 'r' required: true }, ] } assert cmd.help_message() == r'Usage: command [flags] [commands] description Flags: -str str flag -b -bool bool flag -r -required (required) Commands: sub subcommand sub2 another subcommand ' cmd.posix_mode = true assert cmd.help_message() == r'Usage: command [flags] [commands] description Flags: --str str flag -b --bool bool flag -r --required (required) Commands: sub subcommand sub2 another subcommand ' }