Nothing
test_that("miss-var-which returns the right variables", {
expect_equal(miss_var_which(airquality),
c("Ozone", "Solar.R"))
})
test_that("miss-var-which errors on NULL", {
expect_error(miss_var_which(NULL))
})
test_that("miss-var-which returns null when no missings", {
expect_null(miss_var_which(iris))
})
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