Nothing
test_that("layout_nicely() works with negative weights", {
g <- make_graph("petersen")
E(g)$weight <- -5:9
expect_warning(layout_nicely(g), regexp = "ignoring all weights")
})
test_that("layout_nicely() does not recurse into itself", {
g <- make_graph("petersen")
g$layout <- layout_nicely
expect_warning(layout_nicely(g), regexp = NA) # should not recurse infinitely
})
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