#.......................................
# skip a test if python is not available      [ see: https://github.com/rstudio/reticulate/tree/master/tests/testthat ]
#.......................................

skip_test_if_no_python <- function() {
  if (!reticulate::py_available(initialize = FALSE))
    testthat::skip("Python bindings not available for testing")
}


#.........................................
# skip a test if a module is not available      [ see: https://github.com/rstudio/reticulate ]
#.........................................

skip_test_if_no_module <- function(MODULE) {    # MODULE is of type character string ( length(MODULE) >= 1 )

  try({
    if (length(MODULE) == 1) {
      module_exists <- reticulate::py_module_available(MODULE)}
    else {
      module_exists <- sum(as.vector(sapply(MODULE, function(x) reticulate::py_module_available(x)))) == length(MODULE)
    }
  }, silent=TRUE)

  if (!module_exists) {
    testthat::skip(paste0(MODULE, " is not available for testthat-testing"))
  }
}


#..........................................
# run the 'decoding' tests only in python 2 (not in python 3)
#..........................................

tests_python2 = function() {

  vers = NULL

  try({
    vers <- reticulate::py_config()
  }, silent=TRUE)

  if (!is.null(vers)) {
    vers = (as.numeric(vers$version) < 3)
  }

  return(vers)
}