context("as.undirected")
test_that("as.undirected keeps attributes", {
library(igraph)
g <- graph_from_literal(A+-+B, A--+C, C+-+D)
g$name <- "Tiny graph"
E(g)$weight <- seq_len(ecount(g))
g2 <- as.undirected(g, mode="collapse") ; df2 <- as_data_frame(g2)
g3 <- as.undirected(g, mode="each") ; df3 <- as_data_frame(g3)
g4 <- as.undirected(g, mode="mutual") ; df4 <- as_data_frame(g4)
expect_that(g2$name, equals(g$name))
expect_that(g3$name, equals(g$name))
expect_that(g4$name, equals(g$name))
expect_that(df2[order(df2[,1], df2[,2]),]$weight, equals(c(4,2,9)))
expect_that(df3[order(df3[,1], df3[,2]),]$weight, equals(c(1,3,2,4,5)))
expect_that(df4[order(df4[,1], df4[,2]),]$weight, equals(c(4,9)))
})
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