test_that("can construct from character vector", {
expect_identical(utf8(letters), as_utf8(letters))
})
test_that("constructor takes only one argument", {
expect_error(utf8("a", "b"))
})
test_that("constructor coerces to character", {
expect_identical(utf8(1:3), utf8(as.character(1:3)))
})
test_that("can construct empty utf8", {
expect_identical(utf8(), as_utf8(character()))
})
test_that("names are UTF8", {
expect_s3_class(names(utf8(setNames(nm = letters))), "utf8")
})
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