tests/testthat/test-stepaic-f.R

In cmlopera/olsrr: Tools for Building OLS Regression Models

context("stepaic_forward")

test_that("output from stepaic_forward matches the expected outptu", {
  model <- lm(mpg ~ disp + hp + wt + drat, data = mtcars)
  k <- ols_step_forward_aic(model)
  expect_equal(k$steps, 2)
  expect_equivalent(k$predictors, c("wt", "hp"))
  expect_equivalent(round(k$aics, 3), c(166.029, 156.652))
  expect_equivalent(round(k$ess, 3), c(278.322, 195.048))
  expect_equivalent(round(k$rss, 3), c(847.725, 930.999))
  expect_equivalent(round(k$rsq, 3), c(0.753, 0.827))
  expect_equivalent(round(k$arsq, 3), c(0.745, 0.815))
})