R Under development (unstable) (2023-11-29 r85646 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(testthat)
> 
> py_ver <- tryCatch({
+   cfg <- reticulate::py_config()
+   base::numeric_version(cfg$version)
+ }, error = function(e) {
+   base::numeric_version("1")
+ })
> 
> if (py_ver >= "3" && reticulate::py_module_available("sympy")) {
+   local_sympy <- reticulate::import("sympy")
+   
+   if (base::numeric_version(local_sympy$`__version__`) >= "1.4") {
+     # All okay:
+     library(caracas)
+ 
+     test_check("caracas")
+   }
+ }
> 
> proc.time()
   user  system elapsed 
   1.29    0.15    7.90