micro/network/node_test.go

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package network
import (
"testing"
"time"
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pb "github.com/micro/go-micro/network/service/proto"
)
var (
testNodeId = "testNode"
testNodeAddress = "testAddress"
testNodeNetName = "testNetwork"
testNodePeerIds = []string{"peer1", "peer2", "peer3"}
testPeerOfPeerIds = []string{"peer11", "peer12"}
)
func testSetup() *node {
testNode := &node{
id: testNodeId,
address: testNodeAddress,
peers: make(map[string]*node),
network: newNetwork(Name(testNodeNetName)),
err: new(nodeError),
}
// add some peers to the node
for _, id := range testNodePeerIds {
testNode.peers[id] = &node{
id: id,
address: testNode.address + "-" + id,
peers: make(map[string]*node),
network: testNode.network,
err: new(nodeError),
}
}
// add peers to peer1
// NOTE: these are peers of peers!
for _, id := range testPeerOfPeerIds {
testNode.peers["peer1"].peers[id] = &node{
id: id,
address: testNode.address + "-" + id,
peers: make(map[string]*node),
network: testNode.network,
err: new(nodeError),
}
}
// connect peer1 with peer2
testNode.peers["peer1"].peers["peer2"] = testNode.peers["peer2"]
// connect peer2 with peer3
testNode.peers["peer2"].peers["peer3"] = testNode.peers["peer3"]
return testNode
}
func TestNodeId(t *testing.T) {
node := testSetup()
if node.Id() != testNodeId {
t.Errorf("Expected id: %s, found: %s", testNodeId, node.Id())
}
}
func TestNodeAddress(t *testing.T) {
node := testSetup()
if node.Address() != testNodeAddress {
t.Errorf("Expected address: %s, found: %s", testNodeAddress, node.Address())
}
}
func TestNodeNetwork(t *testing.T) {
node := testSetup()
if node.Network().Name() != testNodeNetName {
t.Errorf("Expected network: %s, found: %s", testNodeNetName, node.Network().Name())
}
}
func TestNodes(t *testing.T) {
// single node
single := &node{
id: testNodeId,
address: testNodeAddress,
peers: make(map[string]*node),
network: newNetwork(Name(testNodeNetName)),
}
// get all the nodes including yourself
nodes := single.Nodes()
nodeCount := 1
if len(nodes) != nodeCount {
t.Errorf("Expected to find %d nodes, found: %d", nodeCount, len(nodes))
}
// complicated node graph
node := testSetup()
// get all the nodes including yourself
nodes = node.Nodes()
// compile a list of ids of all nodes in the network into map for easy indexing
nodeIds := make(map[string]bool)
// add yourself
nodeIds[node.id] = true
// add peer Ids
for _, id := range testNodePeerIds {
nodeIds[id] = true
}
// add peer1 peers i.e. peers of peer
for _, id := range testPeerOfPeerIds {
nodeIds[id] = true
}
// we should return the correct number of nodes
if len(nodes) != len(nodeIds) {
t.Errorf("Expected %d nodes, found: %d", len(nodeIds), len(nodes))
}
// iterate through the list of nodes and makes sure all have been returned
for _, node := range nodes {
if _, ok := nodeIds[node.Id()]; !ok {
t.Errorf("Expected to find %s node", node.Id())
}
}
// this is a leaf node
id := "peer11"
if nodePeer := node.GetPeerNode(id); nodePeer == nil {
t.Errorf("Expected to find %s node", id)
}
}
func collectPeerIds(peer Node, ids map[string]bool) map[string]bool {
if len(peer.Peers()) == 0 {
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return ids
}
// iterate through the whole graph
for _, peer := range peer.Peers() {
ids = collectPeerIds(peer, ids)
if _, ok := ids[peer.Id()]; !ok {
ids[peer.Id()] = true
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}
}
return ids
}
func TestPeers(t *testing.T) {
// single node
single := &node{
id: testNodeId,
address: testNodeAddress,
peers: make(map[string]*node),
network: newNetwork(Name(testNodeNetName)),
}
// get node peers
peers := single.Peers()
// there should be no peers
peerCount := 0
if len(peers) != peerCount {
t.Errorf("Expected to find %d nodes, found: %d", peerCount, len(peers))
}
// complicated node graph
node := testSetup()
// list of ids of nodes of MaxDepth
peerIds := make(map[string]bool)
// add peer Ids
for _, id := range testNodePeerIds {
peerIds[id] = true
}
// add peers of peers to peerIds
for _, id := range testPeerOfPeerIds {
peerIds[id] = true
}
// get node peers
peers = node.Peers()
// we will collect all returned Peer Ids into this map
resPeerIds := make(map[string]bool)
for _, peer := range peers {
resPeerIds[peer.Id()] = true
resPeerIds = collectPeerIds(peer, resPeerIds)
}
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// if correct, we must collect all peerIds
if len(resPeerIds) != len(peerIds) {
t.Errorf("Expected to find %d peers, found: %d", len(peerIds), len(resPeerIds))
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}
for id := range resPeerIds {
if _, ok := peerIds[id]; !ok {
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t.Errorf("Expected to find %s peer", id)
}
}
}
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func TestDeletePeerNode(t *testing.T) {
// complicated node graph
node := testSetup()
nodeCount := len(node.Nodes())
// should not find non-existent peer node
if err := node.DeletePeerNode("foobar"); err != ErrPeerNotFound {
t.Errorf("Expected: %v, got: %v", ErrPeerNotFound, err)
}
// lets pick one of the peer1 peers
if err := node.DeletePeerNode(testPeerOfPeerIds[0]); err != nil {
t.Errorf("Error deleting peer node: %v", err)
}
nodeDelCount := len(node.Nodes())
if nodeDelCount != nodeCount-1 {
t.Errorf("Expected node count: %d, got: %d", nodeCount-1, nodeDelCount)
}
}
func TestPrunePeer(t *testing.T) {
// complicated node graph
node := testSetup()
before := node.Nodes()
node.PrunePeer("peer3")
now := node.Nodes()
if len(now) != len(before)-1 {
t.Errorf("Expected pruned node count: %d, got: %d", len(before)-1, len(now))
}
}
func TestPruneStalePeers(t *testing.T) {
// complicated node graph
node := testSetup()
nodes := node.Nodes()
// this will delete all nodes besides the root node
pruneTime := 10 * time.Millisecond
time.Sleep(pruneTime)
// should delete all nodes besides (root) node
pruned := node.PruneStalePeers(pruneTime)
if len(pruned) != len(nodes)-1 {
t.Errorf("Expected pruned node count: %d, got: %d", len(nodes)-1, len(pruned))
}
// complicated node graph
node = testSetup()
nodes = node.Nodes()
// set prune time to 100ms and wait for half of it
pruneTime = 100 * time.Millisecond
time.Sleep(pruneTime)
// update the time of peer1
node.peers["peer1"].lastSeen = time.Now()
// should prune all but the root nodes and peer1
pruned = node.PruneStalePeers(pruneTime)
if len(pruned) != len(nodes)-2 {
t.Errorf("Expected pruned node count: %d, got: %d", len(nodes)-2, len(pruned))
}
}
func TestUnpackPeerTopology(t *testing.T) {
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pbPeer := &pb.Peer{
Node: &pb.Node{
Id: "newPeer",
Address: "newPeerAddress",
Err: &pb.NodeError{},
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},
Peers: make([]*pb.Peer, 0),
}
// it should add pbPeer to the single node peers
peer := UnpackPeerTopology(pbPeer, time.Now(), 5)
if peer.id != pbPeer.Node.Id {
t.Errorf("Expected peer id %s, found: %s", pbPeer.Node.Id, peer.id)
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}
node := testSetup()
// build a simple topology to update node peer1
peer1 := node.peers["peer1"]
pbPeer1Node := &pb.Node{
Id: peer1.id,
Address: peer1.address,
Err: &pb.NodeError{},
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}
pbPeer111 := &pb.Peer{
Node: &pb.Node{
Id: "peer111",
Address: "peer111Address",
Err: &pb.NodeError{},
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},
Peers: make([]*pb.Peer, 0),
}
pbPeer121 := &pb.Peer{
Node: &pb.Node{
Id: "peer121",
Address: "peer121Address",
Err: &pb.NodeError{},
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},
Peers: make([]*pb.Peer, 0),
}
// topology to update
pbPeer1 := &pb.Peer{
Node: pbPeer1Node,
Peers: []*pb.Peer{pbPeer111, pbPeer121},
}
// unpack peer1 topology
peer = UnpackPeerTopology(pbPeer1, time.Now(), 5)
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// make sure peer1 topology has been correctly updated
newPeerIds := []string{pbPeer111.Node.Id, pbPeer121.Node.Id}
for _, id := range newPeerIds {
if _, ok := peer.peers[id]; !ok {
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t.Errorf("Expected %s to be a peer of %s", id, "peer1")
}
}
}
func TestPeersToProto(t *testing.T) {
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// single node
single := &node{
id: testNodeId,
address: testNodeAddress,
peers: make(map[string]*node),
network: newNetwork(Name(testNodeNetName)),
err: &nodeError{},
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}
topCount := 0
protoPeers := PeersToProto(single, 0)
if len(protoPeers.Peers) != topCount {
t.Errorf("Expected to find %d nodes, found: %d", topCount, len(protoPeers.Peers))
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}
// complicated node graph
node := testSetup()
topCount = 3
// list of ids of nodes of depth 1 i.e. node peers
peerIds := make(map[string]bool)
// add peer Ids
for _, id := range testNodePeerIds {
peerIds[id] = true
}
// depth 1 should give us immmediate neighbours only
protoPeers = PeersToProto(node, 1)
if len(protoPeers.Peers) != topCount {
t.Errorf("Expected to find %d nodes, found: %d", topCount, len(protoPeers.Peers))
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}
}