R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences"
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> ### Ensures that the internal ipv4 validipation method operates correctly. Does
> ### not query any device or internet service (as getip() does).
> 
> library(getip)
> 
> 
> # should be true
> test = "127.0.0.1"
> stopifnot(validip(test))
> 
> test = "8.8.8.8"
> stopifnot(validip(test))
> 
> test = "255.255.255.255"
> stopifnot(validip(test))
> 
> 
> # should be false
> test = "11127.0.0.1"
> stopifnot(!validip(test))
> 
> test = "8.8.8.8.8"
> stopifnot(!validip(test))
> 
> test = "-127.0.0.1"
> stopifnot(!validip(test))
> 
> test = "127.1"
> stopifnot(!validip(test))
> 
> test = "256.255.255.255"
> stopifnot(!validip(test))
> 
> test = "255.256.255.255"
> stopifnot(!validip(test))
> 
> test = "255.255.256.255"
> stopifnot(!validip(test))
> 
> test = "255.255.255.256"
> stopifnot(!validip(test))
> 
> test = "255.255.255.255, 127.0.0.1"
> stopifnot(!validip(test))
> 
> test = 127.001
> stopifnot(!validip(test))
> 
> test = NA
> stopifnot(!validip(test))
> 
> 
> # vector test
> test = c("255.255.255.255", "127.0.0.1")
> truth = c(TRUE, TRUE)
> stopifnot(identical(validip(test), truth))
> 
> test = c("127.0.0.1", NA)
> truth = c(TRUE, FALSE)
> stopifnot(identical(validip(test), truth))
> 
> proc.time()
   user  system elapsed 
   0.09    0.07    0.15