tests/testthat/test_deidentify.R

In wilkox/deidentifyr: Deidentify Datasets

context("deidentify()")

MRNs <- 1:10
ages <- 18:27
times_in_hospital <- 1:10
patient_data <- data.frame(
  MRN = MRNs,
  age = ages,
  time_in_hospital = times_in_hospital
)
hashes <- c(
  "580811fa95",
  "eb3be230bb",
  "4621c1d55f",
  "802b906a18",
  "0e65238108",
  "9a049b03f6",
  "396f804443",
  "a30f4ef421",
  "f747870ae6",
  "162e3973ec"
)

test_that("Cryptographic hashes are created from identifying columns", {
  expect_silent(deidentified <- deidentify(patient_data, MRN, age))
  expect_true(is.character(deidentified$id))
  expect_equal(unique(nchar(deidentified$id)), 10)
  expect_equal(deidentified$id, hashes)
})

test_that("Columns are not dropped if requested", {
  expect_silent(deidentified <- deidentify(patient_data, MRN, age, drop = F))
  expect_equal(names(deidentified), c("id", "MRN", "age", "time_in_hospital"))
})

test_that("Hash column takes a custom name", {
  expect_silent(deidentified <- deidentify(patient_data, MRN, age, key = "hash"))
  expect_equal(names(deidentified)[1], "hash")
})

test_that("Salting works", {
  expect_silent(deidentified_salt <- deidentify(
    patient_data, MRN, age, salt = "kosher",
    key = "hash"
  ))
  deidentified <- deidentify(patient_data, MRN, age, key = "hash")
  expect_false(all(deidentified$hash == deidentified_salt$hash))
})

dupes <- rbind(patient_data, patient_data[1, ])

test_that("Duplicate inputs produce a warning", {
  expect_warning(deidentify(dupes, MRN, age, drop = F))
})

test_that("`warn_duplicates` is respected", {
  expect_silent(deidentified <- deidentify(dupes, MRN, age, warn_duplicates = F))
})