[RDF] Increase Stats tests coverage
[RDF] Increase Stats tests coverage

root-mirror/root,root-mirror/root,root-mirror/root,karies/root,karies/root,olifre/root,root-mirror/root,karies/root,karies/root,olifre/root,olifre/root,olifre/root,olifre/root,karies/root,karies/root,root-mirror/root,karies/root,karies/root,karies/root,root-mirror/root,olifre/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root