tests/testthat/test-clmm.R

In javifar/ggeffects: Create Tidy Data Frames of Marginal Effects for 'ggplot' from Model Outputs

.runThisTest <- Sys.getenv("RunAllggeffectsTests") == "yes"

if (.runThisTest &&
    require("testthat") &&
    require("ggeffects") &&
    require("ordinal") &&
    require("MASS") &&
    getRversion() >= "3.6.0") {
  data(wine, package = "ordinal")
  m1 <- clmm(rating ~ temp + contact + (1 | judge), data = wine)

  test_that("ggpredict", {
    p <- ggpredict(m1, "temp")
    expect_equal(p$predicted[1], 0.09760731, tolerance = 1e-3)
    ggpredict(m1, c("temp", "contact"))
  })

  test_that("ggeffect", {
    p <- ggeffect(m1, "temp")
    expect_equal(p$predicted[1], 0.0730260420584538, tolerance = 1e-3)
    ggeffect(m1, c("temp", "contact"))
  })

  test_that("ggemmeans", {
    p <- ggemmeans(m1, "contact")
    expect_equal(p$predicted[1], 0.08691649, tolerance = 1e-5)
    ggemmeans(m1, c("temp", "contact"))
  })
}