Make test runs optional depending available binary

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Remove exception that creeped into commit

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Add special cases to use literal empty lists

Without those, we have plenty of empty list creations at runtime

Signed-off-by: Stefan Marr <git@stefan-marr.de>