gstreamer/subprojects/gst-integration-testsuites/testsuites/validate/flow/simple_test.validatetest

meta,
    args = {
         "videotestsrc num-buffers=3 ! fakesink",
    },
    configs = {
       "$(validateflow), pad=fakesink0:sink, record-buffers=true, caps-properties={ width, height };",
    }