test_that("cluster_edge_betweenness works", {
g <- make_graph("Zachary")
ebc <- cluster_edge_betweenness(g)
expect_equal(max(ebc$modularity), modularity(g, ebc$membership))
expect_equal(
as.vector(membership(ebc)),
c(1, 1, 2, 1, 3, 3, 3, 1, 4, 5, 3, 1, 1, 1, 4, 4, 3, 1, 4, 1, 4, 1, 4, 4, 2, 2, 4, 2, 2, 4, 4, 2, 4, 4)
)
expect_equal(length(ebc), 5)
expect_equal(as.numeric(sizes(ebc)), c(10, 6, 5, 12, 1))
d <- as.dendrogram(ebc)
expect_output(print(d), "2 branches.*34 members.*height 33")
expect_output(
print(d[[1]]),
"2 branches.*15 members.*height 31"
)
expect_output(
print(d[[2]]),
"2 branches.*19 members.*height 32"
)
m2 <- cut_at(ebc, no = 3)
expect_equal(
modularity(g, m2),
ebc$modularity[length(ebc$modularity) - 2]
)
})
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