Nothing
test_that("util_check_one_unique_value works", {
expect_false(util_check_one_unique_value(1:2))
expect_false(util_check_one_unique_value(c(1:2, NA)))
expect_true(util_check_one_unique_value(c(1, NA)))
expect_false(util_check_one_unique_value(c(NA, NA)))
})
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