TST: Test multiple calls to update_positions
TST: Test multiple calls to update_positions

umuzungu/zipline,humdings/zipline,florentchandelier/zipline,wilsonkichoi/zipline,Scapogo/zipline,Scapogo/zipline,alphaBenj/zipline,bartosh/zipline,quantopian/zipline,humdings/zipline,magne-max/zipline-ja,alphaBenj/zipline,umuzungu/zipline,magne-max/zipline-ja,florentchandelier/zipline,enigmampc/catalyst,bartosh/zipline,enigmampc/catalyst,quantopian/zipline,wilsonkichoi/zipline