File: test_graph.density.R

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

test_that("edge_density works", {

  library(igraph)

  g <- sample_gnp(50, 4/50)
  gd <- edge_density(g)
  gd2 <- ecount(g) / vcount(g) / (vcount(g)-1) * 2
  expect_that(gd, equals(gd2))

####

  g <- sample_gnp(50, 4/50, dir=TRUE)
  gd <- edge_density(g)
  gd2 <- ecount(g) / vcount(g) / (vcount(g)-1)
  expect_that(gd, equals(gd2))

})