Nothing
test_that("holdout has no duplicated ids", {
r = rsmp("holdout")
expect_identical(r$duplicated_ids, FALSE)
})
test_that("stratification", {
data = data.table(y = factor(rep(letters[1:2], times = c(90, 10))), x1 = runif(100), x2 = rep(LETTERS[1:2], times = c(50, 50)))
b = as_data_backend(data)
task = TaskClassif$new("stratify_data", b, target = "y")
task$col_roles$stratum = task$target_names
r = rsmp("holdout", ratio = .5)
r$instantiate(task)
i = 1L
expect_equal(task$data(r$train_set(i))[y == "a", .N], 45)
expect_equal(task$data(r$train_set(i))[y == "b", .N], 5)
expect_equal(task$data(r$test_set(i))[y == "a", .N], 45)
expect_equal(task$data(r$test_set(i))[y == "b", .N], 5)
})
test_that("grouping", {
r = rsmp("holdout")
expect_grouping_works(r)
})
test_that("prediction does not drop dimension (#551)", {
task = tsk("iris")
learner = lrn("classif.rpart")
resampling = rsmp("holdout")
resampling$instantiate(task)
design = data.table(
learner = list(learner),
task = list(task),
resampling = list(resampling)
)
bmr = benchmark(design)
expect_number(bmr$aggregate(msr("classif.ce"))[["classif.ce"]])
expect_equal(map(get_private(bmr)$.data$data$fact$prediction, names), list("test"))
})
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