Nothing
test_that("incorrect label types are rejected", {
n1 <- Node$new("n1")
expect_identical(n1$label(), "n1")
expect_error(Node$new(42L), class = "non-string_label")
expect_error(Node$new(TRUE), class = "non-string_label")
})
test_that("node type is returned", {
n1 <- Node$new()
expect_identical(n1$type(), "Node")
})
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