TST: add tests for inferred width labelarray
TST: add tests for inferred width labelarray

bartosh/zipline,Scapogo/zipline,enigmampc/catalyst,enigmampc/catalyst,florentchandelier/zipline,humdings/zipline,quantopian/zipline,bartosh/zipline,quantopian/zipline,alphaBenj/zipline,humdings/zipline,florentchandelier/zipline,alphaBenj/zipline,Scapogo/zipline