context("Vertex and edge sequences")
test_that("we can create vertex/edge seqs", {
g <- make_ring(10)
V(g) %&&% expect_true(TRUE)
E(g) %&&% expect_true(TRUE)
V(g)$name <- letters[1:10]
V(g) %&&% expect_true(TRUE)
E(g) %&&% expect_true(TRUE)
g <- make_ring(10)
E(g)$name <- LETTERS[1:10]
E(g) %&&% expect_true(TRUE)
})
test_that("vs/es keeps names", {
g <- make_ring(10)
V(g)$name <- letters[1:10]
vs <- V(g)
expect_equal(vs$name, names(vs))
vs2 <- vs[4:7]
expect_equal(vs2$name, names(vs2))
E(g)$name <- LETTERS[1:10]
es <- E(g)
expect_equal(es$name, names(es))
es2 <- es[4:7]
expect_equal(es2$name, names(es2))
})
test_that("vs/es refers to the graph", {
g <- make_ring(10)
vs <- V(g)
es <- E(g)
expect_identical(get_vs_graph(vs), g)
expect_identical(get_es_graph(es), g)
})
test_that("vs/es refers to the original graph", {
g <- g2 <- make_ring(10)
vs <- V(g)
es <- E(g)
g <- g + 4
expect_identical(get_vs_graph(vs), g2)
expect_identical(get_es_graph(es), g2)
})
test_that("vs/es references are weak", {
g <- make_ring(10)
vs <- V(g)
es <- E(g)
rm(g)
gc()
expect_null(get_vs_graph(vs))
expect_null(get_es_graph(es))
})
test_that("save/load breaks references", {
g <- make_ring(10)
vs <- V(g)
es <- E(g)
tmp <- tempfile()
on.exit(try(unlink(tmp)))
save(vs, es, file = tmp)
rm(vs, es)
gc()
load(tmp)
expect_null(get_vs_graph(vs))
expect_null(get_es_graph(es))
})
test_that("vs/es keeps names after graph is deleted", {
g <- make_ring(10)
V(g)$name <- letters[1:10]
vs <- V(g)
E(g)$name <- LETTERS[1:10]
es <- E(g)
rm(g)
gc()
expect_equal(names(vs), letters[1:10])
vs2 <- vs[4:7]
expect_equal(names(vs2), letters[4:7])
expect_equal(names(es), LETTERS[1:10])
es2 <- es[4:7]
expect_equal(names(es2), LETTERS[4:7])
})
test_that("both edge and vertex names", {
g <- make_ring(10)
V(g)$name <- letters[1:10]
E(g)$name <- LETTERS[1:10]
es <- E(g)
expect_equal(as.vector(es), 1:10)
expect_equal(names(es), LETTERS[1:10])
el <- as_edgelist(g)
expect_equal(attr(es, "vnames"), paste(el[,1], el[,2], sep = "|"))
x1 <- es[LETTERS[4:7]]
x2 <- E(g)[4:7]
expect_equal(as.vector(x1), as.vector(x2))
expect_equal(names(x1), names(x2))
expect_equal(attr(x1, "vnames"), attr(x2, "vnames"))
y1 <- es[c('a|b', 'd|e')]
y2 <- E(g)[c(1,4)]
expect_equal(as.vector(y1), as.vector(y2))
expect_equal(names(y1), names(y2))
expect_equal(attr(y1, "vnames"), attr(y2, "vnames"))
})
test_that("printing connected vs/es works", {
g <- make_ring(10)
vs <- V(g)
es <- E(g)
sid <- substr(graph_id(g), 1, 7)
expect_output(
print(vs), fixed = TRUE,
paste0("+ 10/10 vertices, from ", sid,
":\n [1] 1 2 3 4 5 6 7 8 9 10")
)
expect_output(
print(es), fixed = TRUE,
paste0("+ 10/10 edges from ", sid,
":\n [1] 1-- 2 2-- 3 3-- 4 4-- 5 5-- 6 6-- 7 7-- 8 8-- 9 9--10 1--10")
)
vs2 <- vs[1:5]
es2 <- es[1:5]
expect_output(print(vs2), fixed = TRUE,
paste0("+ 5/10 vertices, from ", sid, ":\n[1] 1 2 3 4 5"))
expect_output(print(es2), fixed = TRUE,
paste0("+ 5/10 edges from ", sid,
":\n[1] 1--2 2--3 3--4 4--5 5--6"))
vs3 <- vs[numeric()]
es3 <- es[numeric()]
expect_output(print(vs3), fixed = TRUE,
paste0("+ 0/10 vertices, from ", sid, ":"))
expect_output(print(es3), fixed = TRUE,
paste0("+ 0/10 edges from ", sid, ":"))
V(g)$name <- letters[1:10]
vs <- V(g)
es <- E(g)
expect_output(
print(vs), fixed = TRUE,
paste0("+ 10/10 vertices, named, from ", sid,
":\n [1] a b c d e f g h i j")
)
expect_output(
print(es), fixed = TRUE,
paste0("+ 10/10 edges from ", sid, " (vertex names):\n",
" [1] a--b b--c c--d d--e e--f f--g g--h h--i i--j a--j")
)
vs2 <- vs[1:5]
es2 <- es[1:5]
expect_output(
print(vs2), fixed = TRUE,
paste0("+ 5/10 vertices, named, from ", sid, ":\n[1] a b c d e")
)
expect_output(
print(es2), fixed = TRUE,
paste0("+ 5/10 edges from ", sid, " (vertex names):\n",
"[1] a--b b--c c--d d--e e--f")
)
vs3 <- vs[numeric()]
es3 <- es[numeric()]
expect_output(print(vs3), fixed = TRUE,
paste0("+ 0/10 vertices, named, from ", sid, ":"))
expect_output(print(es3), fixed = TRUE,
paste0("+ 0/10 edges from ", sid, " (vertex names):"))
})
test_that("printing unconnected vs/es works", {
g <- make_ring(10)
vs <- V(g)
es <- E(g)
sid <- substr(graph_id(g), 1, 7)
rm(g)
gc()
expect_output(
print(vs), fixed = TRUE,
paste0("+ 10/? vertices, from ", sid,
" (deleted):\n [1] 1 2 3 4 5 6 7 8 9 10")
)
expect_output(
print(es), fixed = TRUE,
paste0("+ 10/? edges from ", sid,
" (deleted):\n [1] 1 2 3 4 5 6 7 8 9 10")
)
g <- make_ring(10)
V(g)$name <- letters[1:10]
vs <- V(g)
es <- E(g)
sid <- substr(graph_id(g), 1, 7)
rm(g)
gc()
expect_output(
print(vs), fixed = TRUE,
paste0("+ 10/? vertices, named, from ", sid,
" (deleted):\n [1] a b c d e f g h i j")
)
expect_output(
print(es), fixed = TRUE,
paste0("+ 10/? edges from ", sid,
" (deleted) (vertex names):\n [1] a|b b|c c|d d|e e|f f|g g|h h|i i|j a|j")
)
})
test_that("unconnected vs/es can be reused with the same graph", {
g <- make_ring(10)
vs <- V(g)
es <- E(g)[1:5]
tmp <- tempfile()
on.exit(unlink(tmp))
save(g, es, vs, file = tmp)
rm(g, es, vs)
gc()
load(tmp)
expect_equal(degree(g, v = vs), rep(2, 10))
expect_true(identical_graphs(
delete_edges(g, es),
delete_edges(g, 1:5)
))
})
test_that("indexing without arguments", {
g <- make_ring(10)
x <- V(g)[]
expect_equal(V(g), x)
x2 <- V(g)[[]]
v <- V(g)
attr(v, "single") <- TRUE
expect_equal(v, x2)
})
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