Added assert raise statements in ColorArray tests for __getitem__ and __setitem__.
Added assert raise statements in ColorArray tests for __getitem__ and __setitem__.

sbtlaarzc/vispy,bollu/vispy,inclement/vispy,drufat/vispy,inclement/vispy,julienr/vispy,RebeccaWPerry/vispy,dchilds7/Deysha-Star-Formation,julienr/vispy,jdreaver/vispy,michaelaye/vispy,Eric89GXL/vispy,srinathv/vispy,bollu/vispy,dchilds7/Deysha-Star-Formation,drufat/vispy,QuLogic/vispy,inclement/vispy,bollu/vispy,sbtlaarzc/vispy,kkuunnddaannkk/vispy,QuLogic/vispy,QuLogic/vispy,sh4wn/vispy,Eric89GXL/vispy,sbtlaarzc/vispy,RebeccaWPerry/vispy,hronoses/vispy,drufat/vispy,jay3sh/vispy,jdreaver/vispy,jay3sh/vispy,ghisvail/vispy,jdreaver/vispy,julienr/vispy,ghisvail/vispy,kkuunnddaannkk/vispy,srinathv/vispy,michaelaye/vispy,hronoses/vispy,jay3sh/vispy,srinathv/vispy,RebeccaWPerry/vispy,kkuunnddaannkk/vispy,michaelaye/vispy,sh4wn/vispy,hronoses/vispy,Eric89GXL/vispy,sh4wn/vispy,dchilds7/Deysha-Star-Formation,ghisvail/vispy