tests/testthat/test-tableau_handler.R

In rstudio/plumbertableau: Turn 'Plumber' APIs into 'Tableau' Extensions

library(plumber)

test_that("tableau_handler warns on missing function params", {
  args <- list(foo = arg_spec("character"), bar = arg_spec("character"))

  expect_warning(tableau_handler(args = args, return = return_spec(), func = function() {}))
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(foo) {}))
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(bar) {}))
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(foo, bar) {}), NA)
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(...) {}), NA)

  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(req, res) {}))
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(req, res, foo) {}))
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(req, res, bar) {}))
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(req, res, foo, bar) {}), NA)
  expect_warning(tableau_handler(args = args, return = return_spec(), func = function(req, res, ...) {}), NA)
})

test_that("Infer tableau handler throws an error when Tableau args and return types aren't provided", {
  expect_error(
    pr() %>%
      pr_post("/foo", function() "foo") %>%
      tableau_extension(),
    regexp = "^Tableau argument and return data types"
  )
})