R Under development (unstable) (2024-01-14 r85805 ucrt) -- "Unsuffered Consequences"
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> suppressPackageStartupMessages(library(pbdZMQ))
> 
> addr = "notarealaddress.com.biz.google"
> port = 8080
> 
> test = address(addr, port)
> truth = paste0("tcp://", addr, ":", port)
> stopifnot(identical(test, truth))
> 
> test = address(addr, transport="ipc")
> truth = paste0("ipc://", addr)
> stopifnot(identical(test, truth))
> 
> proc.time()
   user  system elapsed 
   0.14    0.01    0.15