context("Bug 1073705 from Launchpad")
test_that("Weighted indexing does not remove edges", {
library(igraph)
g <- make_ring(10)
g[1, 2, attr="weight"] <- 0
expect_true("weight" %in% edge_attr_names(g))
expect_that(E(g)$weight, equals(c(0, rep(NA, 9))))
el <- as_edgelist(g)
g[from=el[,1], to=el[,2], attr="sim"] <- rep(0:1, length.out=ecount(g))
expect_true("sim" %in% edge_attr_names(g))
expect_that(E(g)$sim, equals(rep(0:1, 5)))
V(g)$name <- letters[seq_len(vcount(g))]
el <- as_edgelist(g)
g[from=el[,1], to=el[,2], attr="sim"] <- rep(1:0, length.out=ecount(g))
expect_that(E(g)$sim, equals(rep(1:0, 5)))
})
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