input <- tibble::tribble(
  ~STUDYID, ~USUBJID, ~TRTSDTM, ~ASTDTM, ~AENDTM,
  "TEST01", "PAT01", "2012-02-25 23:41:10", "2012-02-28 19:03:00", "2013-02-25 23:32:16",
  "TEST01", "PAT01", "", "2012-02-28 19:00:00", "",
  "TEST01", "PAT01", "2017-02-25 23:00:02", "2013-02-25 19:00:15", "2014-02-25 19:00:56",
  "TEST01", "PAT01", "2017-02-25 16:00:00", "2017-02-25 14:25:00", "2017-03-25 23:00:00",
  "TEST01", "PAT01", "2017-02-25 16:05:17", "2017-02-25 14:20:00", "2018-04-29 14:06:45",
) %>%
  mutate(
    TRTSDTM = lubridate::as_datetime(TRTSDTM),
    ASTDTM = lubridate::as_datetime(ASTDTM),
    AENDTM = lubridate::as_datetime(AENDTM)
  )

# nolint start
# expected output - multiple vars, displaying HH:MM:SS
expected_output <- tibble::tribble(
  ~STUDYID, ~USUBJID, ~TRTSDTM, ~ASTDTM, ~AENDTM, ~TRTSTM, ~ASTTM, ~AENTM,
  "TEST01", "PAT01", "2012-02-25 23:41:10", "2012-02-28 19:03:00", "2013-02-25 23:32:16", "23:41:10", "19:03:00", "23:32:16",
  "TEST01", "PAT01", "", "2012-02-28 19:00:00", "", NA_character_, "19:00:00", NA_character_,
  "TEST01", "PAT01", "2017-02-25 23:00:02", "2013-02-25 19:00:15", "2014-02-25 19:00:56", "23:00:02", "19:00:15", "19:00:56",
  "TEST01", "PAT01", "2017-02-25 16:00:00", "2017-02-25 14:25:00", "2017-03-25 23:00:00", "16:00:00", "14:25:00", "23:00:00",
  "TEST01", "PAT01", "2017-02-25 16:05:17", "2017-02-25 14:20:00", "2018-04-29 14:06:45", "16:05:17", "14:20:00", "14:06:45",
) %>%
  mutate(
    TRTSDTM = lubridate::as_datetime(TRTSDTM),
    ASTDTM = lubridate::as_datetime(ASTDTM),
    AENDTM = lubridate::as_datetime(AENDTM),
    TRTSTM = as_hms(TRTSTM),
    ASTTM = as_hms(ASTTM),
    AENTM = as_hms(AENTM)
  )

expected_output2 <- tibble::tribble(
  ~STUDYID, ~USUBJID, ~TRTSDTM, ~ASTDTM, ~AENDTM, ~TRTSTM,
  "TEST01", "PAT01", "2012-02-25 23:41:10", "2012-02-28 19:03:00", "2013-02-25 23:32:16", "23:41:10",
  "TEST01", "PAT01", "", "2012-02-28 19:00:00", "", NA_character_,
  "TEST01", "PAT01", "2017-02-25 23:00:02", "2013-02-25 19:00:15", "2014-02-25 19:00:56", "23:00:02",
  "TEST01", "PAT01", "2017-02-25 16:00:00", "2017-02-25 14:25:00", "2017-03-25 23:00:00", "16:00:00",
  "TEST01", "PAT01", "2017-02-25 16:05:17", "2017-02-25 14:20:00", "2018-04-29 14:06:45", "16:05:17",
) %>% mutate(
  TRTSDTM = lubridate::as_datetime(TRTSDTM),
  ASTDTM = lubridate::as_datetime(ASTDTM),
  AENDTM = lubridate::as_datetime(AENDTM),
  TRTSTM = as_hms(TRTSTM),
)
# nolint end

## Test 1: mutliple variables ----
test_that("derive_vars_dtm_to_tm Test 1: mutliple variables", {
  actual_output <- derive_vars_dtm_to_tm(
    input,
    exprs(TRTSDTM, ASTDTM, AENDTM)
  )
  expect_dfs_equal(
    expected_output,
    actual_output,
    keys = c("STUDYID", "USUBJID", "TRTSDTM", "ASTDTM", "AENDTM")
  )
})

## Test 2: single variable ----
test_that("derive_vars_dtm_to_tm Test 2: single variable", {
  actual_output <- derive_vars_dtm_to_tm(
    input,
    exprs(TRTSDTM)
  )
  expect_dfs_equal(
    expected_output2,
    actual_output,
    keys = c("STUDYID", "USUBJID", "TRTSDTM", "ASTDTM", "AENDTM")
  )
})