R version 4.4.0 RC (2024-04-16 r86458 ucrt) -- "Puppy Cup"
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Platform: x86_64-w64-mingw32/x64

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> 
> run <- function() {
+ 
+   on_cran <- !isTRUE(as.logical(Sys.getenv("NOT_CRAN", "false")))
+   if (on_cran) {
+     message("env var 'NOT_CRAN=true' not defined; Skipping tests on CRAN")
+     return()
+   }
+ 
+   if (!requireNamespace("testthat", quietly = TRUE)) {
+     message("'testthat' package not available; tests cannot be run")
+     return()
+   }
+ 
+   options(error = traceback)
+   if (requireNamespace("rlang", quietly = TRUE))
+     options(error = rlang::trace_back)
+ 
+   library(testthat)
+   library(reticulate)
+ 
+   test_check("reticulate")
+ 
+ }
> 
> run()
env var 'NOT_CRAN=true' not defined; Skipping tests on CRAN
NULL
> 
> proc.time()
   user  system elapsed 
   0.14    0.03    0.17