ok              delivery #1 -> accept
retry-once      delivery #1 -> release
reject-me       delivery #1 -> reject
always-release  delivery #1 -> release
retry-once      delivery #2 -> accept
always-release  delivery #2 -> release
always-release  delivery #3 -> release
always-release  delivery #4 -> release
always-release  delivery #5 -> release
deliveries of ok             = 1
deliveries of retry-once     = 2
deliveries of reject-me      = 1
deliveries of always-release = 5
