test_that("add_tier works", {
  phenos <- make_phenos_dataframe(ancestor = "Neurodevelopmental delay")
  phenos2 <- add_tier(phenos = phenos)
  cols <- c("tier","tier_auto")
  testthat::expect_false(all(cols %in% names(phenos)))
  testthat::expect_true(all(cols %in% names(phenos2)))
})
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