Official Go implementation of the Ethereum protocol
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 
go-ethereum/p2p/simulations/network_test.go

875 lines
24 KiB

// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package simulations
import (
"bytes"
"context"
"encoding/json"
"fmt"
"reflect"
"strconv"
"strings"
"testing"
"time"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
)
// Tests that a created snapshot with a minimal service only contains the expected connections
// and that a network when loaded with this snapshot only contains those same connections
func TestSnapshot(t *testing.T) {
// PART I
// create snapshot from ring network
// this is a minimal service, whose protocol will take exactly one message OR close of connection before quitting
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) {
return NewNoopService(nil), nil
},
})
// create network
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "noopwoop",
})
// \todo consider making a member of network, set to true threadsafe when shutdown
runningOne := true
defer func() {
if runningOne {
network.Shutdown()
}
}()
// create and start nodes
nodeCount := 20
ids := make([]enode.ID, nodeCount)
for i := 0; i < nodeCount; i++ {
conf := adapters.RandomNodeConfig()
node, err := network.NewNodeWithConfig(conf)
if err != nil {
t.Fatalf("error creating node: %s", err)
}
if err := network.Start(node.ID()); err != nil {
t.Fatalf("error starting node: %s", err)
}
ids[i] = node.ID()
}
// subscribe to peer events
evC := make(chan *Event)
sub := network.Events().Subscribe(evC)
defer sub.Unsubscribe()
// connect nodes in a ring
// spawn separate thread to avoid deadlock in the event listeners
connectErr := make(chan error, 1)
go func() {
for i, id := range ids {
peerID := ids[(i+1)%len(ids)]
if err := network.Connect(id, peerID); err != nil {
connectErr <- err
return
}
}
}()
// collect connection events up to expected number
ctx, cancel := context.WithTimeout(context.TODO(), time.Second)
defer cancel()
checkIds := make(map[enode.ID][]enode.ID)
connEventCount := nodeCount
OUTER:
for {
select {
case <-ctx.Done():
t.Fatal(ctx.Err())
case err := <-connectErr:
t.Fatal(err)
case ev := <-evC:
if ev.Type == EventTypeConn && !ev.Control {
// fail on any disconnect
if !ev.Conn.Up {
t.Fatalf("unexpected disconnect: %v -> %v", ev.Conn.One, ev.Conn.Other)
}
checkIds[ev.Conn.One] = append(checkIds[ev.Conn.One], ev.Conn.Other)
checkIds[ev.Conn.Other] = append(checkIds[ev.Conn.Other], ev.Conn.One)
connEventCount--
log.Debug("ev", "count", connEventCount)
if connEventCount == 0 {
break OUTER
}
}
}
}
// create snapshot of current network
snap, err := network.Snapshot()
if err != nil {
t.Fatal(err)
}
j, err := json.Marshal(snap)
if err != nil {
t.Fatal(err)
}
log.Debug("snapshot taken", "nodes", len(snap.Nodes), "conns", len(snap.Conns), "json", string(j))
// verify that the snap element numbers check out
if len(checkIds) != len(snap.Conns) || len(checkIds) != len(snap.Nodes) {
t.Fatalf("snapshot wrong node,conn counts %d,%d != %d", len(snap.Nodes), len(snap.Conns), len(checkIds))
}
// shut down sim network
runningOne = false
sub.Unsubscribe()
network.Shutdown()
// check that we have all the expected connections in the snapshot
for nodid, nodConns := range checkIds {
for _, nodConn := range nodConns {
var match bool
for _, snapConn := range snap.Conns {
if snapConn.One == nodid && snapConn.Other == nodConn {
match = true
break
} else if snapConn.Other == nodid && snapConn.One == nodConn {
match = true
break
}
}
if !match {
t.Fatalf("snapshot missing conn %v -> %v", nodid, nodConn)
}
}
}
log.Info("snapshot checked")
// PART II
// load snapshot and verify that exactly same connections are formed
adapter = adapters.NewSimAdapter(adapters.LifecycleConstructors{
"noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) {
return NewNoopService(nil), nil
},
})
network = NewNetwork(adapter, &NetworkConfig{
DefaultService: "noopwoop",
})
defer func() {
network.Shutdown()
}()
// subscribe to peer events
// every node up and conn up event will generate one additional control event
// therefore multiply the count by two
evC = make(chan *Event, (len(snap.Conns)*2)+(len(snap.Nodes)*2))
sub = network.Events().Subscribe(evC)
defer sub.Unsubscribe()
// load the snapshot
// spawn separate thread to avoid deadlock in the event listeners
err = network.Load(snap)
if err != nil {
t.Fatal(err)
}
// collect connection events up to expected number
ctx, cancel = context.WithTimeout(context.TODO(), time.Second*3)
defer cancel()
connEventCount = nodeCount
OuterTwo:
for {
select {
case <-ctx.Done():
t.Fatal(ctx.Err())
case ev := <-evC:
if ev.Type == EventTypeConn && !ev.Control {
// fail on any disconnect
if !ev.Conn.Up {
t.Fatalf("unexpected disconnect: %v -> %v", ev.Conn.One, ev.Conn.Other)
}
log.Debug("conn", "on", ev.Conn.One, "other", ev.Conn.Other)
checkIds[ev.Conn.One] = append(checkIds[ev.Conn.One], ev.Conn.Other)
checkIds[ev.Conn.Other] = append(checkIds[ev.Conn.Other], ev.Conn.One)
connEventCount--
log.Debug("ev", "count", connEventCount)
if connEventCount == 0 {
break OuterTwo
}
}
}
}
// check that we have all expected connections in the network
for _, snapConn := range snap.Conns {
var match bool
for nodid, nodConns := range checkIds {
for _, nodConn := range nodConns {
if snapConn.One == nodid && snapConn.Other == nodConn {
match = true
break
} else if snapConn.Other == nodid && snapConn.One == nodConn {
match = true
break
}
}
}
if !match {
t.Fatalf("network missing conn %v -> %v", snapConn.One, snapConn.Other)
}
}
// verify that network didn't generate any other additional connection events after the ones we have collected within a reasonable period of time
ctx, cancel = context.WithTimeout(context.TODO(), time.Second)
defer cancel()
select {
case <-ctx.Done():
case ev := <-evC:
if ev.Type == EventTypeConn {
t.Fatalf("Superfluous conn found %v -> %v", ev.Conn.One, ev.Conn.Other)
}
}
// This test validates if all connections from the snapshot
// are created in the network.
t.Run("conns after load", func(t *testing.T) {
// Create new network.
n := NewNetwork(
adapters.NewSimAdapter(adapters.LifecycleConstructors{
"noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) {
return NewNoopService(nil), nil
},
}),
&NetworkConfig{
DefaultService: "noopwoop",
},
)
defer n.Shutdown()
// Load the same snapshot.
err := n.Load(snap)
if err != nil {
t.Fatal(err)
}
// Check every connection from the snapshot
// if it is in the network, too.
for _, c := range snap.Conns {
if n.GetConn(c.One, c.Other) == nil {
t.Errorf("missing connection: %s -> %s", c.One, c.Other)
}
}
})
}
// TestNetworkSimulation creates a multi-node simulation network with each node
// connected in a ring topology, checks that all nodes successfully handshake
// with each other and that a snapshot fully represents the desired topology
func TestNetworkSimulation(t *testing.T) {
// create simulation network with 20 testService nodes
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"test": newTestService,
})
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "test",
})
defer network.Shutdown()
nodeCount := 20
ids := make([]enode.ID, nodeCount)
for i := 0; i < nodeCount; i++ {
conf := adapters.RandomNodeConfig()
node, err := network.NewNodeWithConfig(conf)
if err != nil {
t.Fatalf("error creating node: %s", err)
}
if err := network.Start(node.ID()); err != nil {
t.Fatalf("error starting node: %s", err)
}
ids[i] = node.ID()
}
// perform a check which connects the nodes in a ring (so each node is
// connected to exactly two peers) and then checks that all nodes
// performed two handshakes by checking their peerCount
action := func(_ context.Context) error {
for i, id := range ids {
peerID := ids[(i+1)%len(ids)]
if err := network.Connect(id, peerID); err != nil {
return err
}
}
return nil
}
check := func(ctx context.Context, id enode.ID) (bool, error) {
// check we haven't run out of time
select {
case <-ctx.Done():
return false, ctx.Err()
default:
}
// get the node
node := network.GetNode(id)
if node == nil {
return false, fmt.Errorf("unknown node: %s", id)
}
// check it has exactly two peers
client, err := node.Client()
if err != nil {
return false, err
}
var peerCount int64
if err := client.CallContext(ctx, &peerCount, "test_peerCount"); err != nil {
return false, err
}
switch {
case peerCount < 2:
return false, nil
case peerCount == 2:
return true, nil
default:
return false, fmt.Errorf("unexpected peerCount: %d", peerCount)
}
}
timeout := 30 * time.Second
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
// trigger a check every 100ms
trigger := make(chan enode.ID)
go triggerChecks(ctx, ids, trigger, 100*time.Millisecond)
result := NewSimulation(network).Run(ctx, &Step{
Action: action,
Trigger: trigger,
Expect: &Expectation{
Nodes: ids,
Check: check,
},
})
if result.Error != nil {
t.Fatalf("simulation failed: %s", result.Error)
}
// take a network snapshot and check it contains the correct topology
snap, err := network.Snapshot()
if err != nil {
t.Fatal(err)
}
if len(snap.Nodes) != nodeCount {
t.Fatalf("expected snapshot to contain %d nodes, got %d", nodeCount, len(snap.Nodes))
}
if len(snap.Conns) != nodeCount {
t.Fatalf("expected snapshot to contain %d connections, got %d", nodeCount, len(snap.Conns))
}
for i, id := range ids {
conn := snap.Conns[i]
if conn.One != id {
t.Fatalf("expected conn[%d].One to be %s, got %s", i, id, conn.One)
}
peerID := ids[(i+1)%len(ids)]
if conn.Other != peerID {
t.Fatalf("expected conn[%d].Other to be %s, got %s", i, peerID, conn.Other)
}
}
}
func createTestNodes(count int, network *Network) (nodes []*Node, err error) {
for i := 0; i < count; i++ {
nodeConf := adapters.RandomNodeConfig()
node, err := network.NewNodeWithConfig(nodeConf)
if err != nil {
return nil, err
}
if err := network.Start(node.ID()); err != nil {
return nil, err
}
nodes = append(nodes, node)
}
return nodes, nil
}
func createTestNodesWithProperty(property string, count int, network *Network) (propertyNodes []*Node, err error) {
for i := 0; i < count; i++ {
nodeConf := adapters.RandomNodeConfig()
nodeConf.Properties = append(nodeConf.Properties, property)
node, err := network.NewNodeWithConfig(nodeConf)
if err != nil {
return nil, err
}
if err := network.Start(node.ID()); err != nil {
return nil, err
}
propertyNodes = append(propertyNodes, node)
}
return propertyNodes, nil
}
// TestGetNodeIDs creates a set of nodes and attempts to retrieve their IDs,.
// It then tests again whilst excluding a node ID from being returned.
// If a node ID is not returned, or more node IDs than expected are returned, the test fails.
func TestGetNodeIDs(t *testing.T) {
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"test": newTestService,
})
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "test",
})
defer network.Shutdown()
numNodes := 5
nodes, err := createTestNodes(numNodes, network)
if err != nil {
t.Fatalf("Could not create test nodes %v", err)
}
gotNodeIDs := network.GetNodeIDs()
if len(gotNodeIDs) != numNodes {
t.Fatalf("Expected %d nodes, got %d", numNodes, len(gotNodeIDs))
}
for _, node1 := range nodes {
match := false
for _, node2ID := range gotNodeIDs {
if bytes.Equal(node1.ID().Bytes(), node2ID.Bytes()) {
match = true
break
}
}
if !match {
t.Fatalf("A created node was not returned by GetNodes(), ID: %s", node1.ID().String())
}
}
excludeNodeID := nodes[3].ID()
gotNodeIDsExcl := network.GetNodeIDs(excludeNodeID)
if len(gotNodeIDsExcl) != numNodes-1 {
t.Fatalf("Expected one less node ID to be returned")
}
for _, nodeID := range gotNodeIDsExcl {
if bytes.Equal(excludeNodeID.Bytes(), nodeID.Bytes()) {
t.Fatalf("GetNodeIDs returned the node ID we excluded, ID: %s", nodeID.String())
}
}
}
// TestGetNodes creates a set of nodes and attempts to retrieve them again.
// It then tests again whilst excluding a node from being returned.
// If a node is not returned, or more nodes than expected are returned, the test fails.
func TestGetNodes(t *testing.T) {
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"test": newTestService,
})
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "test",
})
defer network.Shutdown()
numNodes := 5
nodes, err := createTestNodes(numNodes, network)
if err != nil {
t.Fatalf("Could not create test nodes %v", err)
}
gotNodes := network.GetNodes()
if len(gotNodes) != numNodes {
t.Fatalf("Expected %d nodes, got %d", numNodes, len(gotNodes))
}
for _, node1 := range nodes {
match := false
for _, node2 := range gotNodes {
if bytes.Equal(node1.ID().Bytes(), node2.ID().Bytes()) {
match = true
break
}
}
if !match {
t.Fatalf("A created node was not returned by GetNodes(), ID: %s", node1.ID().String())
}
}
excludeNodeID := nodes[3].ID()
gotNodesExcl := network.GetNodes(excludeNodeID)
if len(gotNodesExcl) != numNodes-1 {
t.Fatalf("Expected one less node to be returned")
}
for _, node := range gotNodesExcl {
if bytes.Equal(excludeNodeID.Bytes(), node.ID().Bytes()) {
t.Fatalf("GetNodes returned the node we excluded, ID: %s", node.ID().String())
}
}
}
// TestGetNodesByID creates a set of nodes and attempts to retrieve a subset of them by ID
// If a node is not returned, or more nodes than expected are returned, the test fails.
func TestGetNodesByID(t *testing.T) {
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"test": newTestService,
})
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "test",
})
defer network.Shutdown()
numNodes := 5
nodes, err := createTestNodes(numNodes, network)
if err != nil {
t.Fatalf("Could not create test nodes: %v", err)
}
numSubsetNodes := 2
subsetNodes := nodes[0:numSubsetNodes]
var subsetNodeIDs []enode.ID
for _, node := range subsetNodes {
subsetNodeIDs = append(subsetNodeIDs, node.ID())
}
gotNodesByID := network.GetNodesByID(subsetNodeIDs)
if len(gotNodesByID) != numSubsetNodes {
t.Fatalf("Expected %d nodes, got %d", numSubsetNodes, len(gotNodesByID))
}
for _, node1 := range subsetNodes {
match := false
for _, node2 := range gotNodesByID {
if bytes.Equal(node1.ID().Bytes(), node2.ID().Bytes()) {
match = true
break
}
}
if !match {
t.Fatalf("A created node was not returned by GetNodesByID(), ID: %s", node1.ID().String())
}
}
}
// TestGetNodesByProperty creates a subset of nodes with a property assigned.
// GetNodesByProperty is then checked for correctness by comparing the nodes returned to those initially created.
// If a node with a property is not found, or more nodes than expected are returned, the test fails.
func TestGetNodesByProperty(t *testing.T) {
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"test": newTestService,
})
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "test",
})
defer network.Shutdown()
numNodes := 3
_, err := createTestNodes(numNodes, network)
if err != nil {
t.Fatalf("Failed to create nodes: %v", err)
}
numPropertyNodes := 3
propertyTest := "test"
propertyNodes, err := createTestNodesWithProperty(propertyTest, numPropertyNodes, network)
if err != nil {
t.Fatalf("Failed to create nodes with property: %v", err)
}
gotNodesByProperty := network.GetNodesByProperty(propertyTest)
if len(gotNodesByProperty) != numPropertyNodes {
t.Fatalf("Expected %d nodes with a property, got %d", numPropertyNodes, len(gotNodesByProperty))
}
for _, node1 := range propertyNodes {
match := false
for _, node2 := range gotNodesByProperty {
if bytes.Equal(node1.ID().Bytes(), node2.ID().Bytes()) {
match = true
break
}
}
if !match {
t.Fatalf("A created node with property was not returned by GetNodesByProperty(), ID: %s", node1.ID().String())
}
}
}
// TestGetNodeIDsByProperty creates a subset of nodes with a property assigned.
// GetNodeIDsByProperty is then checked for correctness by comparing the node IDs returned to those initially created.
// If a node ID with a property is not found, or more nodes IDs than expected are returned, the test fails.
func TestGetNodeIDsByProperty(t *testing.T) {
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"test": newTestService,
})
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "test",
})
defer network.Shutdown()
numNodes := 3
_, err := createTestNodes(numNodes, network)
if err != nil {
t.Fatalf("Failed to create nodes: %v", err)
}
numPropertyNodes := 3
propertyTest := "test"
propertyNodes, err := createTestNodesWithProperty(propertyTest, numPropertyNodes, network)
if err != nil {
t.Fatalf("Failed to created nodes with property: %v", err)
}
gotNodeIDsByProperty := network.GetNodeIDsByProperty(propertyTest)
if len(gotNodeIDsByProperty) != numPropertyNodes {
t.Fatalf("Expected %d nodes with a property, got %d", numPropertyNodes, len(gotNodeIDsByProperty))
}
for _, node1 := range propertyNodes {
match := false
id1 := node1.ID()
for _, id2 := range gotNodeIDsByProperty {
if bytes.Equal(id1.Bytes(), id2.Bytes()) {
match = true
break
}
}
if !match {
t.Fatalf("Not all nodes IDs were returned by GetNodeIDsByProperty(), ID: %s", id1.String())
}
}
}
func triggerChecks(ctx context.Context, ids []enode.ID, trigger chan enode.ID, interval time.Duration) {
tick := time.NewTicker(interval)
defer tick.Stop()
for {
select {
case <-tick.C:
for _, id := range ids {
select {
case trigger <- id:
case <-ctx.Done():
return
}
}
case <-ctx.Done():
return
}
}
}
// \todo: refactor to implement shapshots
// and connect configuration methods once these are moved from
// swarm/network/simulations/connect.go
func BenchmarkMinimalService(b *testing.B) {
b.Run("ring/32", benchmarkMinimalServiceTmp)
}
func benchmarkMinimalServiceTmp(b *testing.B) {
// stop timer to discard setup time pollution
args := strings.Split(b.Name(), "/")
nodeCount, err := strconv.ParseInt(args[2], 10, 16)
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
// this is a minimal service, whose protocol will close a channel upon run of protocol
// making it possible to bench the time it takes for the service to start and protocol actually to be run
protoCMap := make(map[enode.ID]map[enode.ID]chan struct{})
adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
"noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) {
protoCMap[ctx.Config.ID] = make(map[enode.ID]chan struct{})
svc := NewNoopService(protoCMap[ctx.Config.ID])
return svc, nil
},
})
// create network
network := NewNetwork(adapter, &NetworkConfig{
DefaultService: "noopwoop",
})
defer network.Shutdown()
// create and start nodes
ids := make([]enode.ID, nodeCount)
for i := 0; i < int(nodeCount); i++ {
conf := adapters.RandomNodeConfig()
node, err := network.NewNodeWithConfig(conf)
if err != nil {
b.Fatalf("error creating node: %s", err)
}
if err := network.Start(node.ID()); err != nil {
b.Fatalf("error starting node: %s", err)
}
ids[i] = node.ID()
}
// ready, set, go
b.ResetTimer()
// connect nodes in a ring
for i, id := range ids {
peerID := ids[(i+1)%len(ids)]
if err := network.Connect(id, peerID); err != nil {
b.Fatal(err)
}
}
// wait for all protocols to signal to close down
ctx, cancel := context.WithTimeout(context.TODO(), time.Second)
defer cancel()
for nodid, peers := range protoCMap {
for peerid, peerC := range peers {
log.Debug("getting ", "node", nodid, "peer", peerid)
select {
case <-ctx.Done():
b.Fatal(ctx.Err())
case <-peerC:
}
}
}
}
}
func TestNode_UnmarshalJSON(t *testing.T) {
t.Run("up_field", func(t *testing.T) {
runNodeUnmarshalJSON(t, casesNodeUnmarshalJSONUpField())
})
t.Run("config_field", func(t *testing.T) {
runNodeUnmarshalJSON(t, casesNodeUnmarshalJSONConfigField())
})
}
func runNodeUnmarshalJSON(t *testing.T, tests []nodeUnmarshalTestCase) {
t.Helper()
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var got *Node
if err := json.Unmarshal([]byte(tt.marshaled), &got); err != nil {
expectErrorMessageToContain(t, err, tt.wantErr)
got = nil
}
expectNodeEquality(t, got, tt.want)
})
}
}
type nodeUnmarshalTestCase struct {
name string
marshaled string
want *Node
wantErr string
}
func expectErrorMessageToContain(t *testing.T, got error, want string) {
t.Helper()
if got == nil && want == "" {
return
}
if got == nil && want != "" {
t.Errorf("error was expected, got: nil, want: %v", want)
return
}
if !strings.Contains(got.Error(), want) {
t.Errorf(
"unexpected error message, got %v, want: %v",
want,
got,
)
}
}
func expectNodeEquality(t *testing.T, got, want *Node) {
t.Helper()
if !reflect.DeepEqual(got, want) {
t.Errorf("Node.UnmarshalJSON() = %v, want %v", got, want)
}
}
func casesNodeUnmarshalJSONUpField() []nodeUnmarshalTestCase {
return []nodeUnmarshalTestCase{
{
name: "empty json",
marshaled: "{}",
want: newNode(nil, nil, false),
},
{
name: "a stopped node",
marshaled: "{\"up\": false}",
want: newNode(nil, nil, false),
},
{
name: "a running node",
marshaled: "{\"up\": true}",
want: newNode(nil, nil, true),
},
{
name: "invalid JSON value on valid key",
marshaled: "{\"up\": foo}",
wantErr: "invalid character",
},
{
name: "invalid JSON key and value",
marshaled: "{foo: bar}",
wantErr: "invalid character",
},
{
name: "bool value expected but got something else (string)",
marshaled: "{\"up\": \"true\"}",
wantErr: "cannot unmarshal string into Go struct",
},
}
}
func casesNodeUnmarshalJSONConfigField() []nodeUnmarshalTestCase {
// Don't do a big fuss around testing, as adapters.NodeConfig should
// handle it's own serialization. Just do a sanity check.
return []nodeUnmarshalTestCase{
{
name: "Config field is omitted",
marshaled: "{}",
want: newNode(nil, nil, false),
},
{
name: "Config field is nil",
marshaled: "{\"config\": null}",
want: newNode(nil, nil, false),
},
{
name: "a non default Config field",
marshaled: "{\"config\":{\"name\":\"node_ecdd0\",\"port\":44665}}",
want: newNode(nil, &adapters.NodeConfig{Name: "node_ecdd0", Port: 44665}, false),
},
}
}