Nothing
context("check-unique")
test_that("check_unique errors", {
expect_identical(check_unique(1), 1)
expect_identical(check_unique(1:2), 1:2)
expect_identical(check_unique(character(0)), character(0))
expect_error(check_unique(c(1,1)), "c[(]1, 1[)] must be unique")
})
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