tests/testthat/test_base.R

In tuneRanger: Tune Random Forest of the 'ranger' Package

library(mlr)
library(ranger)

context("Output check")

test_that("classification ranger", {
  library(tuneRanger)
  library(mlr)

  # A mlr task has to be created in order to use the package
  # the already existing iris task is used here
  unlink("./optpath.RData")
  iris.task = makeClassifTask(data = iris, target = "Species")
  
  estimateTimeTuneRanger(iris.task, num.trees = 100, num.threads = 1)
  
  # with few iterations
  res = tuneRanger(iris.task, measure = list(multiclass.brier), num.trees = 1000, num.threads = 1, iters = 5, iters.warmup = 5)

  expect_true(is.data.frame(res$results))
  expect_true(is.data.frame(res$recommended.pars))
  expect_true(class(res$model) == "WrappedModel")
  
  # with time budget
  res = tuneRanger(iris.task, measure = list(multiclass.brier), num.trees = 1000, num.threads = 1, time.budget = 5)
  expect_true(is.data.frame(res$results))
})


test_that("tuneMtryFast", {
  library(tuneRanger)
  library(mlr)
  library(survival)
  ## test tuneMtryFast
  learner = makeLearner("classif.tuneMtryFast", predict.type = "prob")
  mod = train(learner, iris.task)
  preds = predict(mod, newdata = getTaskData(iris.task))
  expect_data_frame(preds$data)
  
  learner = makeLearner("regr.tuneMtryFast")
  mod = train(learner, bh.task)
  preds = predict(mod, newdata = getTaskData(bh.task))
  expect_data_frame(preds$data)
  
  learner = makeLearner("surv.tuneMtryFast")
  mod = train(learner, lung.task)
  preds = predict(mod, newdata = getTaskData(lung.task))
  expect_data_frame(preds$data)
})