#!perl
use strict;
use warnings FATAL => 'all';
use Test::More 'no_plan';
{
    package Stuff;
    use Test::More;
    use Function::Parameters qw(:strict);
    method add($this = 23, $that = 42) {
        return $this + $that;
    }
    method minus($this = 23, $that = 42) {
        return $this - $that;
    }
    is( Stuff->add(),    23 + 42 );
    is( Stuff->add(99),  99 + 42 );
    is( Stuff->add(2,3), 5 );
    is( Stuff->minus(),         23 - 42 );
    is( Stuff->minus(99),       99 - 42 );
    is( Stuff->minus(2, 3),     2 - 3 );
    # Test that undef overrides defaults
    method echo($message = "what?") {
        return $message
    }
    is( Stuff->echo(),          "what?" );
    is( Stuff->echo(undef),     undef   );
    is( Stuff->echo("who?"),    'who?'  );
    # Test that you can reference earlier args in a default
    method copy_cat($this, $that = $this) {
        return $that;
    }
    is( Stuff->copy_cat("wibble"), "wibble" );
    is( Stuff->copy_cat(23, 42),   42 );
}
{
    package Bar;
    use Test::More;
    use Function::Parameters qw(:strict);
    method hello($msg = "Hello, world!") {
        return $msg;
    }
    is( Bar->hello,               "Hello, world!" );
    is( Bar->hello("Greetings!"), "Greetings!" );
    method hi($msg = q,Hi,) {
        return $msg;
    }
    is( Bar->hi,                "Hi" );
    is( Bar->hi("Yo"),          "Yo" );
#    method list(@args = (1,2,3)) {
#        return @args;
#    }
#
#    is_deeply [Bar->list()], [1,2,3];
    method code($num, $code = sub { $num + 2 }) {
        return $code->();
    }
    is( Bar->code(42), 44 );
}