tests/testthat/test_tidy.R

In topepo/rsample: General Resampling Infrastructure

library(testthat)
library(rsample)
library(purrr)

check_ind <- function(x, tdat) {
  in_dat <- subset(tdat, Data == "Analysis")
  in_check <- all(sort(in_dat$Row) == x$in_ind)
  out_dat <- subset(tdat, Data == "Analysis")
  out_check <- all(sort(out_dat$Row) == x$out_ind)
  in_check & out_check
}

dat1 <- data.frame(a = 1:20, b = letters[1:20])

test_that('simple boot', {
  set.seed(11)
  rs1 <- bootstraps(dat1)
  td1 <- tidy(rs1, unique_ind = FALSE)
  
  name_vals <- rsample:::names0(nrow(rs1), "Bootstrap")
  for(i in 1:nrow(rs1)) {
    expect_true(
      check_ind(rs1$splits[[i]],
                subset(td1, Resample == name_vals[i])
                )
      )
  }
})


test_that('vfold', {
  set.seed(11)
  rs2 <- vfold_cv(dat1)
  td2 <- tidy(rs2, unique_ind = FALSE)
  
  for(i in 1:nrow(rs2)) {
    expect_true(
      check_ind(rs2$splits[[i]],
                subset(td2, Fold == rs2$id[i])
      )
    )
  }
})

test_that('vfold with repeats', {
  set.seed(11)
  rs3 <- vfold_cv(dat1, repeats = 2)
  td3 <- tidy(rs3, unique_ind = FALSE)

  for(i in 1:nrow(rs3)) {
    expect_true(
      check_ind(rs3$splits[[i]],
                subset(td3, Fold == rs3$id2[i] & Repeat == rs3$id[i])
      )
    )
  }
})