Check that a filter using the $elemhide exception filter option is working as expected.
Test that a filter using the $elemhide filter option whitelists only hiding filters.
localhost##.ex-elemhide
||localhost:5001/testfiles/elemhide/basic/*
@@localhost:5001/en/exceptions/elemhide$elemhide
Test that a filter using the $elemhide filter option whitelists a subframe.
localhost##.targ-elemhide
||localhost:5001/testfiles/elemhide/iframe/*.png
@@localhost:5001/en/exceptions/elemhide$elemhide