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simpleHypergraph <- function() {
nodes <- LETTERS[1:4]
hEdges <- lapply(list("A", LETTERS[1:2], LETTERS[3:4]), "Hyperedge")
hg <- new("Hypergraph", nodes=nodes, hyperedges=hEdges)
}
testConstruction <- function() {
hg <- simpleHypergraph()
checkEquals(TRUE, is(hg, "Hypergraph"))
}
testDirectedHypergraph <- function() {
nodes <- letters[1:4]
dhe1 <- DirectedHyperedge(tail=c("a", "b"), head=c("c", "d"))
dhe2 <- DirectedHyperedge(tail=c("a"), head=c("b", "c", "d"))
dhe3 <- DirectedHyperedge(tail=c("b", "c"), head=c("d"))
dhe4 <- DirectedHyperedge(tail=c("a"), head=c("b"))
hg <- new("Hypergraph", nodes=nodes,
hyperedges=list(dhe1, dhe2, dhe3, dhe4))
checkEquals(TRUE, is(hg, "Hypergraph"))
}
testHyperedges <- function() {
nodes <- LETTERS[1:4]
eList <- list("A", LETTERS[1:2], LETTERS[3:4])
hEdges <- l2hel(eList)
hg <- new("Hypergraph", nodes=nodes, hyperedges=hEdges)
## Add "default" labels
for (i in seq_along(hEdges)) {
he <- hEdges[[i]]
label(he) <- as.character(i)
hEdges[[i]] <- he
}
checkEquals(hEdges, hyperedges(hg))
checkEquals(as.character(seq_along(eList)), hyperedgeLabels(hg))
}
testHyperedgeLabels <- function() {
hg <- simpleHypergraph()
expect <- as.character(1:3)
checkEquals(expect, hyperedgeLabels(hg))
}
testNodes <- function() {
nodes <- LETTERS[1:4]
hEdges <- lapply(c("A", LETTERS[1:2], LETTERS[3:4]), "Hyperedge")
hg <- new("Hypergraph", nodes=nodes, hyperedges=hEdges)
checkEquals(nodes, nodes(hg))
}
testBadHyperedges <- function() {
nodes <- LETTERS[1:4]
hyperedges <- list(matrix(0, nrow=2, ncol=2))
checkException(new("Hypergraph", nodes=nodes, hyperedges=hyperedges))
hyperedges <- lapply(list(1:2, 1:3), "Hyperedge")
checkException(new("Hypergraph", nodes=nodes, hyperedges=hyperedges))
hyperedges <- lapply(list("A", c("A", "B"),
c("C", "Z"), c("Q", "R", "S")),
"Hyperedge")
checkException(new("Hypergraph", nodes=nodes, hyperedges=hyperedges))
}
testNumNodes <- function() {
nodes <- letters[1:10]
hyperedges <- list(Hyperedge("a"))
hg <- new("Hypergraph", nodes=nodes, hyperedges=hyperedges)
checkEquals(10, numNodes(hg))
}
testInciMat <- function() {
nodes <- letters[1:4]
hEdges <- lapply(list(c("a", "b"),
c("b", "c"),
c("c", "d", "a")), "Hyperedge")
hg <- new("Hypergraph", nodes=nodes, hyperedges=hEdges)
mat <- inciMat(hg)
expected <- cbind(c(1, 1, 0, 0),
c(0, 1, 1, 0),
c(1, 0, 1, 1))
rownames(expected) <- nodes
colnames(expected) <- as.character(1:length(hEdges))
checkEquals(expected, mat)
checkEquals(dimnames(expected), dimnames(mat))
}
testToGraphNEL <- function() {
hg <- simpleHypergraph()
bpg <- toGraphNEL(hg)
checkEquals(TRUE, is(bpg, "graphNEL"))
checkEquals(7, length(nodes(bpg)))
checkEquals(5, numEdges(bpg))
expectEdges <- list(A=c("1", "2"),
B="2",
C="3",
D="3",
"1"="A",
"2"=c("A", "B"),
"3"=c("C", "D"))
bpEdges <- edges(bpg)
checkEquals(expectEdges, bpEdges)
expectNodes <- c(LETTERS[1:4], 1:3)
checkEquals(expectNodes, nodes(bpg))
}
## testToGraphAM <- function() {
## hg <- simpleHypergraph()
## bpg <- toGraphAM(hg)
## checkEquals(TRUE, is(bpg, "graphAM"))
## checkEquals(7, length(nodes(bpg)))
## checkEquals(5, numEdges(bpg))
## expectEdges <- list(A=c("1", "2"),
## B="2",
## C="3",
## D="3",
## "1"="A",
## "2"=c("A", "B"),
## "3"=c("C", "D"))
## bpEdges <- edges(bpg)
## checkEquals(expectEdges, bpEdges)
## expectNodes <- c(LETTERS[1:4], 1:3)
## checkEquals(expectNodes, nodes(bpg))
## }
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