func TestGraphBuilderCentralizedSinglePath(t *testing.T) {
links := []nom.Link{
{From: "n1$$1", To: "n2$$1"},
{From: "n1$$2", To: "n3$$1"},
{From: "n2$$2", To: "n4$$1"},
{From: "n3$$2", To: "n5$$1"},
{From: "n4$$2", To: "n5$$2"},
{From: "n5$$3", To: "n6$$1"},
{From: "n4$$3", To: "n6$$2"},
{From: "n6$$1", To: "n5$$3"},
{From: "n6$$2", To: "n4$$3"},
}
b := GraphBuilderCentralized{}
ctx := &bh.MockRcvContext{}
for _, l := range links {
msg := &bh.MockMsg{
MsgData: nom.LinkAdded(l),
}
b.Rcv(msg, ctx)
}
paths, l := ShortestPathCentralized("n1", "n6", ctx)
if l != 3 {
t.Errorf("invalid shortest path between n1 and n6: actual=%d want=3", l)
}
if len(paths) != 2 {
t.Errorf("invalid number of paths between n1 and n6: actual=%d want=2",
len(paths))
}
for _, p := range paths {
if p[1] != links[2] && p[1] != links[3] {
t.Errorf("invalid path: %v", p)
}
}
}
func buildTopologyForTest() *bh.MockRcvContext {
links := []nom.Link{
{From: "n1$$1", To: "n2$$1"},
{From: "n2$$1", To: "n1$$1"},
{From: "n2$$2", To: "n4$$1"},
{From: "n4$$1", To: "n2$$2"},
{From: "n3$$2", To: "n5$$1"},
{From: "n5$$1", To: "n3$$2"},
{From: "n4$$2", To: "n6$$1"},
{From: "n6$$1", To: "n4$$2"},
{From: "n5$$2", To: "n6$$2"},
{From: "n6$$2", To: "n5$$2"},
}
b := discovery.GraphBuilderCentralized{}
ctx := &bh.MockRcvContext{}
for _, l := range links {
msg := &bh.MockMsg{
MsgData: nom.LinkAdded(l),
}
b.Rcv(msg, ctx)
}
return ctx
}
func (h *newLinkHandler) Rcv(msg bh.Msg, ctx bh.RcvContext) error {
l := nom.Link(msg.Data().(NewLink))
n, _ := nom.ParsePortUID(l.From)
d := ctx.Dict(nodeDict)
k := string(n)
v, err := d.Get(k)
if err != nil {
return err
}
np := v.(nodePortsAndLinks)
if oldl, ok := np.linkFrom(l.From); ok {
if oldl.UID() == l.UID() {
return nil
}
np.removeLink(oldl)
ctx.Emit(nom.LinkDeleted(oldl))
}
glog.V(2).Infof("Link detected %v", l)
ctx.Emit(nom.LinkAdded(l))
np.L = append(np.L, l)
return d.Put(k, np)
}