R Under development (unstable) (2024-02-14 r85901 ucrt) -- "Unsuffered Consequences"
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> library(cpr)
> 
> ################################################################################
> stopifnot("available data sets" =
+   identical(
+     data(package = "cpr")$results[, "Item"]
+     ,
+     c("spdg", "us_covid_cases")
+   )
+ )
> 
> ################################################################################
> #                        simple checks of the spdg data                        #
> stopifnot(identical(class(spdg), "data.frame"))
> stopifnot(identical(dim(spdg), c(24628L, 9L)))
> stopifnot(identical(names(spdg), c("id", "age", "ttm", "ethnicity", "bmi", "day_from_dlt", "day_of_cycle", "day", "pdg")))
> 
> ################################################################################
> #                       simple checks of us_covid_cases                        #
> stopifnot(identical(class(us_covid_cases), "data.frame"))
> stopifnot(identical(dim(us_covid_cases), c(1227L, 2L)))
> stopifnot(identical(names(us_covid_cases), c("date", "cases")))
> 
> ################################################################################
> ##                                End of File                                 ##
> ################################################################################
> 
> proc.time()
   user  system elapsed 
   0.25    0.10    0.29