tests: add new timestamp unit test
tests: add new timestamp unit test

centricular/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,collects/gstreamer,magcius/gstreamer,krichter722/gstreamer,Distrotech/gstreamer,collects/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,collects/gstreamer,jpakkane/gstreamer,magcius/gstreamer,surround-io/gstreamer,ahmedammar/platform_external_gst_gstreamer,ahmedammar/platform_external_gst_gstreamer,StreamUtils/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,collects/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,ahmedammar/platform_external_gst_gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,justinjoy/gstreamer,ylatuya/gstreamer,lubosz/gstreamer,krieger-od/gstreamer,mparis/gstreamer,mrchapp/gstreamer,drothlis/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,jpxiong/gstreamer,mparis/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpxiong/gstreamer,krichter722/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,mrchapp/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,mrchapp/gstreamer,ensonic/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,magcius/gstreamer,Distrotech/gstreamer,lubosz/gstreamer,centricular/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,collects/gstreamer,drothlis/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,mparis/gstreamer,Distrotech/gstreamer,cfoch/gstreamer,centricular/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,mparis/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,justinjoy/gstreamer,Distrotech/gstreamer,mrchapp/gstreamer,ylatuya/gstreamer,krieger-od/gstreamer,lubosz/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,magcius/gstreamer,mrchapp/gstreamer,justinjoy/gstreamer,Distrotech/gstreamer,ylatuya/gstreamer,ylatuya/gstreamer,cablelabs/gstreamer,Lachann/gstreamer,drothlis/gstreamer,mparis/gstreamer,ahmedammar/platform_external_gst_gstreamer,ensonic/gstreamer,drothlis/gstreamer,Lachann/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,magcius/gstreamer,shelsonjava/gstreamer,cfoch/gstreamer,cfoch/gstreamer,ylatuya/gstreamer,drothlis/gstreamer,lovebug356/gstreamer