buffer: add new test
buffer: add new test

lubosz/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,cablelabs/gstreamer,surround-io/gstreamer,lovebug356/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,cfoch/gstreamer,jpakkane/gstreamer,justinjoy/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,surround-io/gstreamer,krichter722/gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,centricular/gstreamer,cablelabs/gstreamer,cablelabs/gstreamer,justinjoy/gstreamer,centricular/gstreamer,collects/gstreamer,Lachann/gstreamer,mparis/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,krichter722/gstreamer,mparis/gstreamer,mparis/gstreamer,lubosz/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,collects/gstreamer,centricular/gstreamer,shelsonjava/gstreamer,krieger-od/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,mparis/gstreamer,krichter722/gstreamer,ensonic/gstreamer,jpakkane/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,collects/gstreamer,surround-io/gstreamer,krichter722/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,ensonic/gstreamer,surround-io/gstreamer,surround-io/gstreamer,mparis/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,ensonic/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,cfoch/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,cfoch/gstreamer,justinjoy/gstreamer,StreamUtils/gstreamer,collects/gstreamer,lubosz/gstreamer,cablelabs/gstreamer,collects/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,centricular/gstreamer,jpakkane/gstreamer