Add test for make_png Save random RGBA and RGB arrays onto disk as PNGs using `make_png()`. Read them back with an image library and check whether the array saved is equal to the array read.
Add test for make_png
Save random RGBA and RGB arrays onto disk as PNGs using `make_png()`.
Read them back with an image library and check whether the array saved
is equal to the array read.

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