File: test_dyad.census.R

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r-cran-igraph 1.0.1-1%2Bdeb9u1
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context("dyad_census")

test_that("dyad_census works", {
  library(igraph)
  ce <- simplify(read_graph(gzfile("celegansneural.gml.gz"), format="gml"))
  dc <- dyad_census(ce)

  expect_that(dc, equals(list(mut=197, asym=1951, null=41808)))
  expect_that(sum(which_mutual(ce)), equals(dc$mut * 2))
  expect_that(ecount(as.undirected(ce, mode="collapse")) - dc$mut,
              equals(dc$asym))
  expect_that(sum(unlist(dc)), equals(vcount(ce) * (vcount(ce)-1) / 2))
})