Leaner swarm/network and p2p/simulations

p2p/simulations/adapters/inproc.go

@@ -351,17 +351,3 @@ func (sn *SimNode) NodeInfo() *p2p.NodeInfo {
 	}
 	return server.NodeInfo()
 }
-
-func setSocketBuffer(conn net.Conn, socketReadBuffer int, socketWriteBuffer int) error {
-	if v, ok := conn.(*net.UnixConn); ok {
-		err := v.SetReadBuffer(socketReadBuffer)
-		if err != nil {
-			return err
-		}
-		err = v.SetWriteBuffer(socketWriteBuffer)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}

p2p/simulations/connect.go

@@ -25,21 +25,8 @@ import (
 
 var (
 	ErrNodeNotFound = errors.New("node not found")
-	ErrNoPivotNode  = errors.New("no pivot node set")
 )
 
-// ConnectToPivotNode connects the node with provided NodeID
-// to the pivot node, already set by Network.SetPivotNode method.
-// It is useful when constructing a star network topology
-// when Network adds and removes nodes dynamically.
-func (net *Network) ConnectToPivotNode(id enode.ID) (err error) {
-	pivot := net.GetPivotNode()
-	if pivot == nil {
-		return ErrNoPivotNode
-	}
-	return net.connect(pivot.ID(), id)
-}
-
 // ConnectToLastNode connects the node with provided NodeID
 // to the last node that is up, and avoiding connection to self.
 // It is useful when constructing a chain network topology
@@ -115,35 +102,23 @@ func (net *Network) ConnectNodesRing(ids []enode.ID) (err error) {
 	return net.connect(ids[l-1], ids[0])
 }
 
-// ConnectNodesStar connects all nodes in a star topology
-// with the center at provided NodeID.
+// ConnectNodesStar connects all nodes into a star topology
 // If ids argument is nil, all nodes that are up will be connected.
-func (net *Network) ConnectNodesStar(pivot enode.ID, ids []enode.ID) (err error) {
+func (net *Network) ConnectNodesStar(ids []enode.ID, center enode.ID) (err error) {
 	if ids == nil {
 		ids = net.getUpNodeIDs()
 	}
 	for _, id := range ids {
-		if pivot == id {
+		if center == id {
 			continue
 		}
-		if err := net.connect(pivot, id); err != nil {
+		if err := net.connect(center, id); err != nil {
 			return err
 		}
 	}
 	return nil
 }
 
-// ConnectNodesStarPivot connects all nodes in a star topology
-// with the center at already set pivot node.
-// If ids argument is nil, all nodes that are up will be connected.
-func (net *Network) ConnectNodesStarPivot(ids []enode.ID) (err error) {
-	pivot := net.GetPivotNode()
-	if pivot == nil {
-		return ErrNoPivotNode
-	}
-	return net.ConnectNodesStar(pivot.ID(), ids)
-}
-
 // connect connects two nodes but ignores already connected error.
 func (net *Network) connect(oneID, otherID enode.ID) error {
 	return ignoreAlreadyConnectedErr(net.Connect(oneID, otherID))
@@ -155,22 +130,3 @@ func ignoreAlreadyConnectedErr(err error) error {
 	}
 	return err
 }
-
-// SetPivotNode sets the NodeID of the network's pivot node.
-// Pivot node is just a specific node that should be treated
-// differently then other nodes in test. SetPivotNode and
-// GetPivotNode are just a convenient functions to set and
-// retrieve it.
-func (net *Network) SetPivotNode(id enode.ID) {
-	net.lock.Lock()
-	defer net.lock.Unlock()
-	net.pivotNodeID = id
-}
-
-// GetPivotNode returns NodeID of the pivot node set by
-// Network.SetPivotNode method.
-func (net *Network) GetPivotNode() (node *Node) {
-	net.lock.RLock()
-	defer net.lock.RUnlock()
-	return net.getNode(net.pivotNodeID)
-}

p2p/simulations/connect_test.go

@@ -57,24 +57,6 @@ func newTestNetwork(t *testing.T, nodeCount int) (*Network, []enode.ID) {
 	return network, ids
 }
 
-func TestConnectToPivotNode(t *testing.T) {
-	net, ids := newTestNetwork(t, 2)
-	defer net.Shutdown()
-
-	pivot := ids[0]
-	net.SetPivotNode(pivot)
-
-	other := ids[1]
-	err := net.ConnectToPivotNode(other)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if net.GetConn(pivot, other) == nil {
-		t.Error("pivot and the other node are not connected")
-	}
-}
-
 func TestConnectToLastNode(t *testing.T) {
 	net, ids := newTestNetwork(t, 10)
 	defer net.Shutdown()
@@ -124,15 +106,48 @@ func TestConnectToRandomNode(t *testing.T) {
 }
 
 func TestConnectNodesFull(t *testing.T) {
-	net, ids := newTestNetwork(t, 12)
-	defer net.Shutdown()
+	tests := []struct {
+		name      string
+		nodeCount int
+	}{
+		{name: "no node", nodeCount: 0},
+		{name: "single node", nodeCount: 1},
+		{name: "2 nodes", nodeCount: 2},
+		{name: "3 nodes", nodeCount: 2},
+		{name: "even number of nodes", nodeCount: 12},
+		{name: "odd number of nodes", nodeCount: 13},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			net, ids := newTestNetwork(t, test.nodeCount)
+			defer net.Shutdown()
+
+			err := net.ConnectNodesFull(ids)
+			if err != nil {
+				t.Fatal(err)
+			}
 
-	err := net.ConnectNodesFull(ids)
-	if err != nil {
-		t.Fatal(err)
+			verifyFull(t, net, ids)
+		})
+	}
+}
+
+func verifyFull(t *testing.T, net *Network, ids []enode.ID) {
+	t.Helper()
+	n := len(ids)
+	var connections int
+	for i, lid := range ids {
+		for _, rid := range ids[i+1:] {
+			if net.GetConn(lid, rid) != nil {
+				connections++
+			}
+		}
 	}
 
-	VerifyFull(t, net, ids)
+	want := n * (n - 1) / 2
+	if connections != want {
+		t.Errorf("wrong number of connections, got: %v, want: %v", connections, want)
+	}
 }
 
 func TestConnectNodesChain(t *testing.T) {
@@ -144,7 +159,26 @@ func TestConnectNodesChain(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	VerifyChain(t, net, ids)
+	verifyChain(t, net, ids)
+}
+
+func verifyChain(t *testing.T, net *Network, ids []enode.ID) {
+	t.Helper()
+	n := len(ids)
+	for i := 0; i < n; i++ {
+		for j := i + 1; j < n; j++ {
+			c := net.GetConn(ids[i], ids[j])
+			if i == j-1 {
+				if c == nil {
+					t.Errorf("nodes %v and %v are not connected, but they should be", i, j)
+				}
+			} else {
+				if c != nil {
+					t.Errorf("nodes %v and %v are connected, but they should not be", i, j)
+				}
+			}
+		}
+	}
 }
 
 func TestConnectNodesRing(t *testing.T) {
@@ -156,7 +190,26 @@ func TestConnectNodesRing(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	VerifyRing(t, net, ids)
+	verifyRing(t, net, ids)
+}
+
+func verifyRing(t *testing.T, net *Network, ids []enode.ID) {
+	t.Helper()
+	n := len(ids)
+	for i := 0; i < n; i++ {
+		for j := i + 1; j < n; j++ {
+			c := net.GetConn(ids[i], ids[j])
+			if i == j-1 || (i == 0 && j == n-1) {
+				if c == nil {
+					t.Errorf("nodes %v and %v are not connected, but they should be", i, j)
+				}
+			} else {
+				if c != nil {
+					t.Errorf("nodes %v and %v are connected, but they should not be", i, j)
+				}
+			}
+		}
+	}
 }
 
 func TestConnectNodesStar(t *testing.T) {
@@ -165,26 +218,29 @@ func TestConnectNodesStar(t *testing.T) {
 
 	pivotIndex := 2
 
-	err := net.ConnectNodesStar(ids[pivotIndex], ids)
+	err := net.ConnectNodesStar(ids, ids[pivotIndex])
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	VerifyStar(t, net, ids, pivotIndex)
+	verifyStar(t, net, ids, pivotIndex)
 }
 
-func TestConnectNodesStarPivot(t *testing.T) {
-	net, ids := newTestNetwork(t, 10)
-	defer net.Shutdown()
-
-	pivotIndex := 4
-
-	net.SetPivotNode(ids[pivotIndex])
-
-	err := net.ConnectNodesStarPivot(ids)
-	if err != nil {
-		t.Fatal(err)
+func verifyStar(t *testing.T, net *Network, ids []enode.ID, centerIndex int) {
+	t.Helper()
+	n := len(ids)
+	for i := 0; i < n; i++ {
+		for j := i + 1; j < n; j++ {
+			c := net.GetConn(ids[i], ids[j])
+			if i == centerIndex || j == centerIndex {
+				if c == nil {
+					t.Errorf("nodes %v and %v are not connected, but they should be", i, j)
+				}
+			} else {
+				if c != nil {
+					t.Errorf("nodes %v and %v are connected, but they should not be", i, j)
+				}
+			}
+		}
 	}
-
-	VerifyStar(t, net, ids, pivotIndex)
 }

p2p/simulations/network.go

@@ -58,8 +58,6 @@ type Network struct {
 	Conns   []*Conn `json:"conns"`
 	connMap map[string]int
 
-	pivotNodeID enode.ID
-
 	nodeAdapter adapters.NodeAdapter
 	events      event.Feed
 	lock        sync.RWMutex

p2p/simulations/test.go

@@ -1,8 +1,6 @@
 package simulations
 
 import (
-	"testing"
-
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
@@ -57,78 +55,3 @@ func (t *NoopService) Start(server *p2p.Server) error {
 func (t *NoopService) Stop() error {
 	return nil
 }
-
-func VerifyRing(t *testing.T, net *Network, ids []enode.ID) {
-	t.Helper()
-	n := len(ids)
-	for i := 0; i < n; i++ {
-		for j := i + 1; j < n; j++ {
-			c := net.GetConn(ids[i], ids[j])
-			if i == j-1 || (i == 0 && j == n-1) {
-				if c == nil {
-					t.Errorf("nodes %v and %v are not connected, but they should be", i, j)
-				}
-			} else {
-				if c != nil {
-					t.Errorf("nodes %v and %v are connected, but they should not be", i, j)
-				}
-			}
-		}
-	}
-}
-
-func VerifyChain(t *testing.T, net *Network, ids []enode.ID) {
-	t.Helper()
-	n := len(ids)
-	for i := 0; i < n; i++ {
-		for j := i + 1; j < n; j++ {
-			c := net.GetConn(ids[i], ids[j])
-			if i == j-1 {
-				if c == nil {
-					t.Errorf("nodes %v and %v are not connected, but they should be", i, j)
-				}
-			} else {
-				if c != nil {
-					t.Errorf("nodes %v and %v are connected, but they should not be", i, j)
-				}
-			}
-		}
-	}
-}
-
-func VerifyFull(t *testing.T, net *Network, ids []enode.ID) {
-	t.Helper()
-	n := len(ids)
-	var connections int
-	for i, lid := range ids {
-		for _, rid := range ids[i+1:] {
-			if net.GetConn(lid, rid) != nil {
-				connections++
-			}
-		}
-	}
-
-	want := n * (n - 1) / 2
-	if connections != want {
-		t.Errorf("wrong number of connections, got: %v, want: %v", connections, want)
-	}
-}
-
-func VerifyStar(t *testing.T, net *Network, ids []enode.ID, centerIndex int) {
-	t.Helper()
-	n := len(ids)
-	for i := 0; i < n; i++ {
-		for j := i + 1; j < n; j++ {
-			c := net.GetConn(ids[i], ids[j])
-			if i == centerIndex || j == centerIndex {
-				if c == nil {
-					t.Errorf("nodes %v and %v are not connected, but they should be", i, j)
-				}
-			} else {
-				if c != nil {
-					t.Errorf("nodes %v and %v are connected, but they should not be", i, j)
-				}
-			}
-		}
-	}
-}

swarm/network/simulation/bucket_test.go

@@ -100,7 +100,7 @@ func TestServiceBucket(t *testing.T) {
 		}
 	})
 
-	if err := sim.StopNode(id2); err != nil {
+	if err := sim.Net.Stop(id2); err != nil {
 		t.Fatal(err)
 	}