context("Pajek file format")
test_that("writing Pajek files works", {
library(igraph)
g <- make_ring(9)
V(g)$color <- c("red", "green", "yellow")
tc <- rawConnection(raw(0), "w")
write_graph(g, format="pajek", file=tc)
out <- rawToChar(rawConnectionValue(tc))
close(tc)
expect_that(out, equals("*Vertices 9\n1 \"1\" ic \"red\"\n2 \"2\" ic \"green\"\n3 \"3\" ic \"yellow\"\n4 \"4\" ic \"red\"\n5 \"5\" ic \"green\"\n6 \"6\" ic \"yellow\"\n7 \"7\" ic \"red\"\n8 \"8\" ic \"green\"\n9 \"9\" ic \"yellow\"\n*Edges\n1 2\n2 3\n3 4\n4 5\n5 6\n6 7\n7 8\n8 9\n1 9\n"))
})
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