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context("graph_from_edgelist")

test_that("graph_from_edgelist works", {

  library(igraph)

  g <- sample_gnp(50, 5/50)
  el <- as_edgelist(g)
  g2 <- graph_from_edgelist(el, directed=FALSE)
  expect_true(graph.isomorphic(g, g2))

####

  g <- sample_gnp(50, 5/50, directed=TRUE)
  el <- as_edgelist(g)
  g2 <- graph_from_edgelist(el, directed=TRUE)
  expect_true(graph.isomorphic(g, g2))

####

  g <- sample_gnp(26, 5/26, directed=TRUE)
  el <- as_edgelist(g)
  n <- letters[1:26]
  names(n) <- 1:26
  mode(el) <- "character"
  el[] <- n[el]
  g2 <- graph_from_edgelist(el, directed=TRUE)
  expect_true(graph.isomorphic(g, g2))

})

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