// Test edge subgraph conversion
TEST(subgraph, TestConvertESubGraphs) {
PNEGraph NEGraph;
PNGraph NGraph;
TIntV NIdV;
TIntV EIdV;
int i;
NGraph = GetTestTNGraph();
EXPECT_EQ(20,NGraph->GetNodes());
EXPECT_EQ(60,NGraph->GetEdges());
for (i = 0; i < 20; i += 2) {
NIdV.Add(i);
}
// TODO: fix TSnap::ConvertSubGraph<PUNGraph>(NGraph, NIdV, true), it fails
// UNGraph = TSnap::ConvertSubGraph<PUNGraph>(NGraph, NIdV, true);
NEGraph = TSnap::ConvertGraph<PNEGraph>(NGraph);
EXPECT_EQ(20,NEGraph->GetNodes());
EXPECT_EQ(60,NEGraph->GetEdges());
// select every second edge
i = 0;
for (TNEGraph::TEdgeI EI = NEGraph->BegEI(); EI < NEGraph->EndEI(); EI++) {
if (i == 0) {
EIdV.Add(EI.GetId());
}
i = (i + 1) % 2;
}
NGraph = TSnap::ConvertESubGraph<PNGraph>(NEGraph, EIdV);
EXPECT_EQ(20,NGraph->GetNodes());
EXPECT_EQ(30,NGraph->GetEdges());
}
// Test edge subgraph conversion
void TestConvertESubGraphs() {
PNEGraph NEGraph;
PNGraph NGraph;
int N1, N2, N3;
int E1, E2, E3;
TIntV NIdV;
TIntV EIdV;
int i;
NGraph = GetTestTNGraph();
N1 = NGraph->GetNodes();
E1 = NGraph->GetEdges();
for (i = 0; i < 20; i += 2) {
NIdV.Add(i);
}
// TODO: fix TSnap::ConvertSubGraph<PUNGraph>(NGraph, NIdV, true), it fails
// UNGraph = TSnap::ConvertSubGraph<PUNGraph>(NGraph, NIdV, true);
NEGraph = TSnap::ConvertGraph<PNEGraph>(NGraph);
N2 = NEGraph->GetNodes();
E2 = NEGraph->GetEdges();
// select every second edge
i = 0;
for (TNEGraph::TEdgeI EI = NEGraph->BegEI(); EI < NEGraph->EndEI(); EI++) {
if (i == 0) {
EIdV.Add(EI.GetId());
}
i = (i + 1) % 2;
}
NGraph = TSnap::ConvertESubGraph<PNGraph>(NEGraph, EIdV);
N3 = NGraph->GetNodes();
E3 = NGraph->GetEdges();
printf("---- TestConvertESubGraphs -----\n");
printf("nodes: %d,%d,%d, edges: %d,%d,%d\n", N1, N2, N3, E1, E2, E3);
printf("\n");
}
// Test node, edge creation
TEST(TNEGraph, ManipulateNodesEdges) {
int NNodes = 1000;
int NEdges = 100000;
const char *FName = "test.graph";
PNEGraph Graph;
PNEGraph Graph1;
PNEGraph Graph2;
int i;
int n;
int NCount;
int x,y;
int Deg, InDeg, OutDeg;
Graph = TNEGraph::New();
EXPECT_EQ(1,Graph->Empty());
// create the nodes
for (i = 0; i < NNodes; i++) {
Graph->AddNode(i);
}
EXPECT_EQ(0,Graph->Empty());
EXPECT_EQ(NNodes,Graph->GetNodes());
// create random edges
NCount = NEdges;
while (NCount > 0) {
x = (long) (drand48() * NNodes);
y = (long) (drand48() * NNodes);
n = Graph->AddEdge(x, y);
NCount--;
}
EXPECT_EQ(NEdges,Graph->GetEdges());
EXPECT_EQ(0,Graph->Empty());
EXPECT_EQ(1,Graph->IsOk());
for (i = 0; i < NNodes; i++) {
EXPECT_EQ(1,Graph->IsNode(i));
}
EXPECT_EQ(0,Graph->IsNode(NNodes));
EXPECT_EQ(0,Graph->IsNode(NNodes+1));
EXPECT_EQ(0,Graph->IsNode(2*NNodes));
// nodes iterator
NCount = 0;
for (TNEGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
NCount++;
}
EXPECT_EQ(NNodes,NCount);
// edges per node iterator
NCount = 0;
for (TNEGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
for (int e = 0; e < NI.GetOutDeg(); e++) {
NCount++;
}
}
EXPECT_EQ(NEdges,NCount);
// edges iterator
NCount = 0;
for (TNEGraph::TEdgeI EI = Graph->BegEI(); EI < Graph->EndEI(); EI++) {
NCount++;
}
EXPECT_EQ(NEdges,NCount);
// node degree
for (TNEGraph::TNodeI NI = Graph->BegNI(); NI < Graph->EndNI(); NI++) {
Deg = NI.GetDeg();
InDeg = NI.GetInDeg();
OutDeg = NI.GetOutDeg();
EXPECT_EQ(Deg,InDeg+OutDeg);
}
// assignment
Graph1 = TNEGraph::New();
*Graph1 = *Graph;
EXPECT_EQ(NNodes,Graph1->GetNodes());
EXPECT_EQ(NEdges,Graph1->GetEdges());
EXPECT_EQ(0,Graph1->Empty());
EXPECT_EQ(1,Graph1->IsOk());
// saving and loading
{
TFOut FOut(FName);
Graph->Save(FOut);
FOut.Flush();
}
{
TFIn FIn(FName);
Graph2 = TNEGraph::Load(FIn);
}
EXPECT_EQ(NNodes,Graph2->GetNodes());
EXPECT_EQ(NEdges,Graph2->GetEdges());
EXPECT_EQ(0,Graph2->Empty());
EXPECT_EQ(1,Graph2->IsOk());
// remove all the nodes and edges
for (i = 0; i < NNodes; i++) {
n = Graph->GetRndNId();
Graph->DelNode(n);
}
EXPECT_EQ(0,Graph->GetNodes());
EXPECT_EQ(0,Graph->GetEdges());
EXPECT_EQ(1,Graph->IsOk());
EXPECT_EQ(1,Graph->Empty());
Graph1->Clr();
EXPECT_EQ(0,Graph1->GetNodes());
EXPECT_EQ(0,Graph1->GetEdges());
EXPECT_EQ(1,Graph1->IsOk());
EXPECT_EQ(1,Graph1->Empty());
}