my $subs =  {
    'split1'     => sub { my $s3 = split1( $s1, $s2 ) },
    'substr1'    => sub { my $s3 = substr1( $s1, $s2 ) },
    'kyle'       => sub { my $s3 = kyle( $s1, $s2 ) },
    'moritz'     => sub { my $s3 = moritz( $s1, $s2 ) },
    'corion'     => sub { my $s3 = corion( $s1, $s2 ) },
    'ikegami_s'  => sub { my $s3 = ikegami_s( $s1, $s2 ) },
    'ikegami_tr' => sub { my $s3 = ikegami_tr( $s1, $s2 ) },
    'avar'       => sub { my $s3 = avar( $s1, $s2 ) },
};

cmpthese( -2, $subs );

use Test::More;

plan 'tests' => scalar keys %{$subs};

my $s3;
foreach my $subname ( keys %{$subs} ) {
    my $sub = $subs->{$subname};
    if ( defined $s3 ) {
        is( $sub->(), $s3, "$subname gets same value" );
    }
    else {
        $s3 = $sub->();
        ok( defined $s3, "$subname gets some value" );
    }
}