update union, intersection and difference tests
update union, intersection and difference tests

ASP1234/voc,pombredanne/voc,freakboy3742/voc,cflee/voc,ASP1234/voc,pombredanne/voc,Felix5721/voc,gEt-rIgHt-jR/voc,gEt-rIgHt-jR/voc,Felix5721/voc,freakboy3742/voc,cflee/voc