More tests for EquaSet's withFilter.
More tests for EquaSet's withFilter.

rahulkavale/scalatest,SRGOM/scalatest,janekdb/scalatest,SRGOM/scalatest,triggerNZ/scalatest,rfries/scalatest,rfries/scalatest,matterche/scalatest,flicken/scalatest,gcberger/scalatest,matterche/scalatest,janekdb/scalatest,triggerNZ/scalatest,gcberger/scalatest,rfries/scalatest,triggerNZ/scalatest,gcberger/scalatest,matterche/scalatest,SRGOM/scalatest,flicken/scalatest,rahulkavale/scalatest,triggerNZ/scalatest,janekdb/scalatest,rahulkavale/scalatest,matterche/scalatest,SRGOM/scalatest,rfries/scalatest,rahulkavale/scalatest,janekdb/scalatest,gcberger/scalatest,flicken/scalatest,flicken/scalatest