test_that("n_miss handles 0 cases as I expect",{
expect_equal(n_miss(0), 0)
expect_equal(n_miss(numeric(0)),0)
expect_equal(n_miss(mtcars[0]),0)
})
test_that("n_miss correctly counts the number of missings",{
expect_equal(n_miss(c(0,NA,120,NA)),2)
expect_equal(n_miss(c(NA,NA,NA,NA)),4)
expect_equal(n_miss(c(1,2,3,4,5)),0)
})
test_that("n_miss works for dataframes",{
expect_equal(n_miss(airquality), 44)
})
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