library(testthat)
library(rsample)
library(purrr)
library(tibble)
iris2 <- as.tibble(iris)
get_id_left_out <- function(x)
unique(as.character(assessment(x)$Species))
test_that('bad args', {
expect_error(group_vfold_cv(iris, group = iris$Species))
expect_error(group_vfold_cv(iris, group = c("Species", "Sepal.Width")))
expect_error(group_vfold_cv(iris, group = "Specie"))
expect_error(group_vfold_cv(iris))
expect_error(group_vfold_cv(iris, group = "Species", v = 10))
})
test_that('default param', {
set.seed(11)
rs1 <- group_vfold_cv(iris, "Species")
sizes1 <- rsample:::dim_rset(rs1)
expect_true(all(sizes1$analysis == 100))
expect_true(all(sizes1$assessment == 50))
same_data <-
map_lgl(rs1$splits, function(x)
all.equal(x$data, iris))
expect_true(all(same_data))
good_holdout <- map_lgl(rs1$splits,
function(x) {
length(intersect(x$in_ind, x$out_id)) == 0
})
expect_true(all(good_holdout))
sp_out <- map_chr(rs1$splits, get_id_left_out)
expect_true(all(table(sp_out) == 1))
})
test_that('v < max v', {
set.seed(11)
rs2 <- group_vfold_cv(iris, "Species", v = 2)
sizes2 <- rsample:::dim_rset(rs2)
expect_true(!all(sizes2$analysis == 100))
expect_true(!all(sizes2$assessment == 50))
same_data <-
map_lgl(rs2$splits, function(x)
all.equal(x$data, iris))
expect_true(all(same_data))
good_holdout <- map_lgl(rs2$splits,
function(x) {
length(intersect(x$in_ind, x$out_id)) == 0
})
expect_true(all(good_holdout))
sp_out <- map(rs2$splits, get_id_left_out)
expect_true(all(table(unlist(sp_out)) == 1))
})
test_that('tibble input', {
set.seed(11)
rs3 <- group_vfold_cv(iris2, "Species")
sizes3 <- rsample:::dim_rset(rs3)
expect_true(all(sizes3$analysis == 100))
expect_true(all(sizes3$assessment == 50))
same_data <-
map_lgl(rs3$splits, function(x)
all.equal(x$data, iris2))
expect_true(all(same_data))
good_holdout <- map_lgl(rs3$splits,
function(x) {
length(intersect(x$in_ind, x$out_id)) == 0
})
expect_true(all(good_holdout))
sp_out <- map_chr(rs3$splits, get_id_left_out)
expect_true(all(table(sp_out) == 1))
})
test_that('printing', {
expect_output(print(group_vfold_cv(iris, "Species")))
})
test_that('rsplit labels', {
rs <- group_vfold_cv(iris, "Species")
all_labs <- map_df(rs$splits, labels)
original_id <- rs[, grepl("^id", names(rs))]
expect_equal(all_labs, original_id)
})
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