test_that("input checks work correctly and return appropriate messages", {
  if (Sys.getenv("NOT_CRAN") == "") {
    skip_on_cran()
  }
  general_error <- paste(
    "Nothing to amend, please specify a proper model to either add or drop, or",
    "changes to loo_controls;\n Returning original model set."
  )
  m_1 <- paste0("Nothing to amend, please specify a model to either add or",
                " drop that differs from the original set")
  m_2 <- "Returning original model set."
  m_3 <- paste0("No new LOO fitting/weighting arguments have been specified;",
                " ignoring argument loo_controls.")
  expect_message(amend(manec_example), general_error)
  amend(manec_example, drop = "nec3param") |>
    expect_message(general_error) |>
    expect_message(m_1)
  m_4 <- "loo_controls list names are incorrect. See ?bnec"
  manec_example |>
    amend(loo_controls = list(method = "somethingwrong")) |>
    expect_message(m_4) |>
    expect_error()
  expect_message(amend(manec_example, drop = "nec4param")) |>
    suppressWarnings()
  amend(manec_example, add = "nec3param") |>
    expect_message() |>
    expect_message("Fitted models are: nec4param ecx4param") |>
    suppressWarnings()
  amend(manec_example, add = "nec4param",
        loo_controls = list(weights = list(method = "pseudobma"))) |>
    expect_message(general_error) |>
    expect_message(m_1) |>
    expect_message(m_3)
  amend(manec_example,
        loo_controls = list(weights = list(method = "pseudobma"))) |>
    expect_message(general_error) |>
    expect_message(m_3)
})