tests/testthat/test-layout_large_graphs.R

In graphlayouts: Additional Layout Algorithms for Network Visualizations

test_that("layout_with_pmds works", {
  g <- igraph::make_graph( ~ a -- b -- c -- d:e:f)
  expect_is(layout_with_pmds(g,5),"matrix")
  expect_equal(ncol(layout_with_pmds(g,5,dim = 3)),3)
  expect_error(layout_with_pmds(g))
  expect_error(layout_with_pmds(g,10))
  expect_error(layout_with_pmds(1))
  expect_no_error(layout_with_pmds(g,pivots = 5,weights = rep(4,5)))

  g <- igraph::graph.full(10) + igraph::graph.full(10)
  expect_error(layout_with_pmds(g,10))
})

test_that("layout_with_sparse_stress works", {
  g <- igraph::make_graph( ~ a -- b -- c -- d:e:f)
  expect_is(layout_with_sparse_stress(g,5),"matrix")
  expect_error(layout_with_sparse_stress(g))
  expect_error(layout_with_sparse_stress(g,10))
  expect_error(layout_with_sparse_stress(1))

  g <- igraph::graph.full(10) + igraph::graph.full(10)
  expect_error(layout_with_sparse_stress(g,10))
  g <- igraph::graph.full(10)
  expect_warning(layout_with_sparse_stress(g,pivots = 5,weights = rep(4,45)))
})