Nothing
a <- maxample("animal")
attr(a, "Metadata") <- NULL
test_that("add_columns works", {
expect_error(add_columns(a, dim = "bla"), "does not exist")
expect_error(add_columns(a, dim = 1:2), "must be a single \\(sub\\)dimension")
expect_error(add_columns(a, dim = 3.1, fill = 1:10), "fill value must be of length 1")
a2 <- add_columns(a, addnm = c("horse", "magpie"), dim = "species", fill = 42)
items <- c("animal.rabbit.black", "animal.rabbit.white", "animal.bird.black",
"animal.bird.red", "animal.dog.brown", "animal.horse.black",
"animal.horse.white", "animal.horse.red", "animal.horse.brown",
"animal.magpie.black", "animal.magpie.white", "animal.magpie.red",
"animal.magpie.brown")
expect_identical(getItems(a2, dim = 3), items)
expect_true(all(a2[, , "horse"] == 42))
expect_identical(add_columns(a, dim = 3.2, addnm = character(0)), a)
expect_identical(add_columns(a, dim = 3.2, addnm = NULL), a)
})
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