Nothing
test_that("check_key works", {
expect_identical(check_key(data.frame()), data.frame())
expect_invisible(check_key(data.frame()))
expect_invisible(check_key(data.frame(x = 1)))
expect_invisible(check_key(data.frame(x = 1), "x"))
expect_invisible(check_key(data.frame(x = c(1, 1), y = 1:2), c("y", "x")))
expect_invisible(check_key(data.frame(x = c(1, 1), y = c(NA, 1)), c("y", "x")))
expect_invisible(check_key(data.frame(x = c(1, 1), y = NA), c("y", "x"), na_distinct = TRUE))
})
test_that("check_key fails", {
x <- data.frame(x = c(1, 2), y = c(1, 1), z = NA)
expect_chk_error(
check_key(x, c("y", "y")),
"`key` must be unique[.]$"
)
expect_chk_error(
check_key(x, "y"),
"^Column 'y' in `x` must be a unique key[.]$"
)
expect_chk_error(
check_key(x, c("y", "z")),
"^Columns 'y' and 'z' in `x` must be a unique key[.]$"
)
})
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