R Under development (unstable) (2024-02-14 r85901 ucrt) -- "Unsuffered Consequences"
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> library(cpr)
> 
> # testing of the newknots method
> 
> ################################################################################
> # check that the method is not exported
> stopifnot(!grepl("newknots", ls("package:cpr")))
> cpr_namespace <- ls( getNamespace("cpr"), all.names = TRUE)
> stopifnot(sum(cpr_namespace == "newknots") == 1L)
> stopifnot(sum(grepl("^newknots$", cpr_namespace)) == 1L)
> 
> ################################################################################
> 
> cp0 <- cp(log(pdg) ~ bsplines(day, iknots = c(-.25, 0, 0.25), bknots = c(-1, 1)), data = spdg)
> 
> expected <- log(pdg) ~ bsplines(day, iknots = c(-0.85, 0, 0.25, 0.3), bknots = c(-1, 1))
> 
> test <- cpr:::newknots(cp0$call$formula, c(-0.85, 0, 0.25, 0.3))
> 
> stopifnot(isTRUE( all.equal(expected, test)))
> 
> ################################################################################
> #                                 End of File                                  #
> ################################################################################
> 
> proc.time()
   user  system elapsed 
   1.67    0.25    1.90