if (

  requiet("gmnl") &&
    requiet("mlogit") &&
    requiet("MASS")) {
  data(housing, package = "MASS")

  dat <<- mlogit.data(housing, choice = "Sat", shape = "wide")
  void <- capture.output(
    m1 <- gmnl(Sat ~ Infl + Type + Cont | 1,
      data = dat,
      model = "smnl",
      R = 100
    )
  )

  test_that("model_info", {
    expect_false(model_info(m1)$is_ordinal)
    expect_true(model_info(m1)$is_multinomial)
  })

  test_that("find_predictors", {
    expect_identical(find_predictors(m1), list(conditional = c("Infl", "Type", "Cont")))
    expect_identical(
      find_predictors(m1, flatten = TRUE),
      c("Infl", "Type", "Cont")
    )
    expect_null(find_predictors(m1, effects = "random"))
  })

  test_that("find_response", {
    expect_identical(find_response(m1), "Sat")
  })

  test_that("link_inverse", {
    expect_equal(link_inverse(m1)(0.2), plogis(0.2), tolerance = 1e-5)
  })

  test_that("get_data", {
    expect_equal(nrow(get_data(m1, verbose = FALSE)), 216)
    expect_equal(colnames(get_data(m1, verbose = FALSE)), c("Sat", "Infl", "Type", "Cont"))
  })

  test_that("find_formula", {
    expect_length(find_formula(m1), 1)
  })

  test_that("find_terms", {
    expect_equal(find_terms(m1), list(
      response = "Sat",
      conditional = c("Infl", "Type", "Cont", "1")
    ))
    expect_equal(
      find_terms(m1, flatten = TRUE),
      c("Sat", "Infl", "Type", "Cont", "1")
    )
  })

  test_that("n_obs", {
    expect_equal(n_obs(m1), 72)
  })

  test_that("find_variables", {
    expect_equal(find_variables(m1), list(
      response = "Sat",
      conditional = c("Infl", "Type", "Cont")
    ))
    expect_equal(
      find_variables(m1, flatten = TRUE),
      c("Sat", "Infl", "Type", "Cont")
    )
  })


  test_that("linkfun", {
    expect_false(is.null(link_function(m1)))
  })

  test_that("is_multivariate", {
    expect_false(is_multivariate(m1))
  })

  test_that("find_statistic", {
    expect_identical(find_statistic(m1), "z-statistic")
  })
}
