mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-08-20 10:52:25 +00:00
p2p: Migrate p2p/simulations & p2p/testing to ethersphere/swarm
This commit is contained in:
Ross Chadwick
parent
ae178fd447
commit
338a122995
3 changed files with 0 additions and 633 deletions
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@ -1,67 +0,0 @@
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// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package testing
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import (
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"fmt"
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"sync"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p/enode"
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)
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type TestPeer interface {
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ID() enode.ID
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Drop()
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}
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// TestPeerPool is an example peerPool to demonstrate registration of peer connections
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type TestPeerPool struct {
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lock sync.Mutex
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peers map[enode.ID]TestPeer
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}
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func NewTestPeerPool() *TestPeerPool {
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return &TestPeerPool{peers: make(map[enode.ID]TestPeer)}
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}
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func (p *TestPeerPool) Add(peer TestPeer) {
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p.lock.Lock()
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defer p.lock.Unlock()
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log.Trace(fmt.Sprintf("pp add peer %v", peer.ID()))
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p.peers[peer.ID()] = peer
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}
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func (p *TestPeerPool) Remove(peer TestPeer) {
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p.lock.Lock()
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defer p.lock.Unlock()
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delete(p.peers, peer.ID())
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}
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func (p *TestPeerPool) Has(id enode.ID) bool {
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p.lock.Lock()
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defer p.lock.Unlock()
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_, ok := p.peers[id]
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return ok
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}
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func (p *TestPeerPool) Get(id enode.ID) TestPeer {
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p.lock.Lock()
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defer p.lock.Unlock()
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return p.peers[id]
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}
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@ -1,282 +0,0 @@
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// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package testing
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import (
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
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)
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var errTimedOut = errors.New("timed out")
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// ProtocolSession is a quasi simulation of a pivot node running
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// a service and a number of dummy peers that can send (trigger) or
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// receive (expect) messages
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type ProtocolSession struct {
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Server *p2p.Server
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Nodes []*enode.Node
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adapter *adapters.SimAdapter
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events chan *p2p.PeerEvent
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}
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// Exchange is the basic units of protocol tests
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// the triggers and expects in the arrays are run immediately and asynchronously
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// thus one cannot have multiple expects for the SAME peer with DIFFERENT message types
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// because it's unpredictable which expect will receive which message
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// (with expect #1 and #2, messages might be sent #2 and #1, and both expects will complain about wrong message code)
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// an exchange is defined on a session
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type Exchange struct {
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Label string
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Triggers []Trigger
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Expects []Expect
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Timeout time.Duration
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}
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// Trigger is part of the exchange, incoming message for the pivot node
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// sent by a peer
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type Trigger struct {
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Msg interface{} // type of message to be sent
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Code uint64 // code of message is given
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Peer enode.ID // the peer to send the message to
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Timeout time.Duration // timeout duration for the sending
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}
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// Expect is part of an exchange, outgoing message from the pivot node
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// received by a peer
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type Expect struct {
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Msg interface{} // type of message to expect
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Code uint64 // code of message is now given
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Peer enode.ID // the peer that expects the message
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Timeout time.Duration // timeout duration for receiving
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}
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// Disconnect represents a disconnect event, used and checked by TestDisconnected
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type Disconnect struct {
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Peer enode.ID // discconnected peer
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Error error // disconnect reason
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}
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// trigger sends messages from peers
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func (s *ProtocolSession) trigger(trig Trigger) error {
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simNode, ok := s.adapter.GetNode(trig.Peer)
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if !ok {
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return fmt.Errorf("trigger: peer %v does not exist (1- %v)", trig.Peer, len(s.Nodes))
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}
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mockNode, ok := simNode.Services()[0].(*mockNode)
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if !ok {
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return fmt.Errorf("trigger: peer %v is not a mock", trig.Peer)
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}
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errc := make(chan error)
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go func() {
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log.Trace(fmt.Sprintf("trigger %v (%v)....", trig.Msg, trig.Code))
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errc <- mockNode.Trigger(&trig)
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log.Trace(fmt.Sprintf("triggered %v (%v)", trig.Msg, trig.Code))
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}()
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t := trig.Timeout
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if t == time.Duration(0) {
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t = 1000 * time.Millisecond
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}
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select {
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case err := <-errc:
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return err
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case <-time.After(t):
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return fmt.Errorf("timout expecting %v to send to peer %v", trig.Msg, trig.Peer)
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}
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}
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// expect checks an expectation of a message sent out by the pivot node
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func (s *ProtocolSession) expect(exps []Expect) error {
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// construct a map of expectations for each node
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peerExpects := make(map[enode.ID][]Expect)
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for _, exp := range exps {
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if exp.Msg == nil {
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return errors.New("no message to expect")
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}
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peerExpects[exp.Peer] = append(peerExpects[exp.Peer], exp)
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}
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// construct a map of mockNodes for each node
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mockNodes := make(map[enode.ID]*mockNode)
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for nodeID := range peerExpects {
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simNode, ok := s.adapter.GetNode(nodeID)
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if !ok {
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return fmt.Errorf("trigger: peer %v does not exist (1- %v)", nodeID, len(s.Nodes))
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}
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mockNode, ok := simNode.Services()[0].(*mockNode)
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if !ok {
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return fmt.Errorf("trigger: peer %v is not a mock", nodeID)
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}
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mockNodes[nodeID] = mockNode
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}
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// done chanell cancels all created goroutines when function returns
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done := make(chan struct{})
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defer close(done)
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// errc catches the first error from
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errc := make(chan error)
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wg := &sync.WaitGroup{}
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wg.Add(len(mockNodes))
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for nodeID, mockNode := range mockNodes {
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nodeID := nodeID
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mockNode := mockNode
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go func() {
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defer wg.Done()
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// Sum all Expect timeouts to give the maximum
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// time for all expectations to finish.
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// mockNode.Expect checks all received messages against
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// a list of expected messages and timeout for each
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// of them can not be checked separately.
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var t time.Duration
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for _, exp := range peerExpects[nodeID] {
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if exp.Timeout == time.Duration(0) {
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t += 2000 * time.Millisecond
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} else {
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t += exp.Timeout
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}
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}
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alarm := time.NewTimer(t)
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defer alarm.Stop()
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// expectErrc is used to check if error returned
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// from mockNode.Expect is not nil and to send it to
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// errc only in that case.
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// done channel will be closed when function
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expectErrc := make(chan error)
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go func() {
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select {
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case expectErrc <- mockNode.Expect(peerExpects[nodeID]...):
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case <-done:
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case <-alarm.C:
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}
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}()
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select {
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case err := <-expectErrc:
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if err != nil {
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select {
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case errc <- err:
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case <-done:
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case <-alarm.C:
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errc <- errTimedOut
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}
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}
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case <-done:
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case <-alarm.C:
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errc <- errTimedOut
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}
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}()
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}
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go func() {
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wg.Wait()
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// close errc when all goroutines finish to return nill err from errc
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close(errc)
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}()
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return <-errc
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}
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// TestExchanges tests a series of exchanges against the session
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func (s *ProtocolSession) TestExchanges(exchanges ...Exchange) error {
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for i, e := range exchanges {
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if err := s.testExchange(e); err != nil {
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return fmt.Errorf("exchange #%d %q: %v", i, e.Label, err)
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}
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log.Trace(fmt.Sprintf("exchange #%d %q: run successfully", i, e.Label))
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}
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return nil
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}
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// testExchange tests a single Exchange.
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// Default timeout value is 2 seconds.
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func (s *ProtocolSession) testExchange(e Exchange) error {
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errc := make(chan error)
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done := make(chan struct{})
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defer close(done)
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go func() {
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for _, trig := range e.Triggers {
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err := s.trigger(trig)
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if err != nil {
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errc <- err
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return
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}
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}
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select {
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case errc <- s.expect(e.Expects):
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case <-done:
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}
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}()
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// time out globally or finish when all expectations satisfied
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t := e.Timeout
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if t == 0 {
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t = 2000 * time.Millisecond
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}
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alarm := time.NewTimer(t)
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select {
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case err := <-errc:
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return err
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case <-alarm.C:
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return errTimedOut
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}
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}
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// TestDisconnected tests the disconnections given as arguments
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// the disconnect structs describe what disconnect error is expected on which peer
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func (s *ProtocolSession) TestDisconnected(disconnects ...*Disconnect) error {
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expects := make(map[enode.ID]error)
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for _, disconnect := range disconnects {
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expects[disconnect.Peer] = disconnect.Error
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}
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timeout := time.After(time.Second)
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for len(expects) > 0 {
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select {
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case event := <-s.events:
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if event.Type != p2p.PeerEventTypeDrop {
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continue
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}
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expectErr, ok := expects[event.Peer]
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if !ok {
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continue
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}
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if !(expectErr == nil && event.Error == "" || expectErr != nil && expectErr.Error() == event.Error) {
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return fmt.Errorf("unexpected error on peer %v. expected '%v', got '%v'", event.Peer, expectErr, event.Error)
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}
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delete(expects, event.Peer)
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case <-timeout:
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return fmt.Errorf("timed out waiting for peers to disconnect")
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}
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}
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return nil
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}
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@ -1,284 +0,0 @@
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// Copyright 2018 The go-ethereum Authors
|
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// 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/>.
|
||||
|
||||
/*
|
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the p2p/testing package provides a unit test scheme to check simple
|
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protocol message exchanges with one pivot node and a number of dummy peers
|
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The pivot test node runs a node.Service, the dummy peers run a mock node
|
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that can be used to send and receive messages
|
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*/
|
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package testing
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||||
|
||||
import (
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"bytes"
|
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"crypto/ecdsa"
|
||||
"fmt"
|
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"io"
|
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"io/ioutil"
|
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"strings"
|
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"sync"
|
||||
|
||||
"github.com/ethereum/go-ethereum/log"
|
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"github.com/ethereum/go-ethereum/node"
|
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"github.com/ethereum/go-ethereum/p2p"
|
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"github.com/ethereum/go-ethereum/p2p/enode"
|
||||
"github.com/ethereum/go-ethereum/p2p/simulations"
|
||||
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
|
||||
"github.com/ethereum/go-ethereum/rlp"
|
||||
"github.com/ethereum/go-ethereum/rpc"
|
||||
)
|
||||
|
||||
// ProtocolTester is the tester environment used for unit testing protocol
|
||||
// message exchanges. It uses p2p/simulations framework
|
||||
type ProtocolTester struct {
|
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*ProtocolSession
|
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network *simulations.Network
|
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}
|
||||
|
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// NewProtocolTester constructs a new ProtocolTester
|
||||
// it takes as argument the pivot node id, the number of dummy peers and the
|
||||
// protocol run function called on a peer connection by the p2p server
|
||||
func NewProtocolTester(prvkey *ecdsa.PrivateKey, nodeCount int, run func(*p2p.Peer, p2p.MsgReadWriter) error) *ProtocolTester {
|
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services := adapters.Services{
|
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"test": func(ctx *adapters.ServiceContext) (node.Service, error) {
|
||||
return &testNode{run}, nil
|
||||
},
|
||||
"mock": func(ctx *adapters.ServiceContext) (node.Service, error) {
|
||||
return newMockNode(), nil
|
||||
},
|
||||
}
|
||||
adapter := adapters.NewSimAdapter(services)
|
||||
net := simulations.NewNetwork(adapter, &simulations.NetworkConfig{})
|
||||
nodeConfig := &adapters.NodeConfig{
|
||||
PrivateKey: prvkey,
|
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EnableMsgEvents: true,
|
||||
Services: []string{"test"},
|
||||
}
|
||||
if _, err := net.NewNodeWithConfig(nodeConfig); err != nil {
|
||||
panic(err.Error())
|
||||
}
|
||||
if err := net.Start(nodeConfig.ID); err != nil {
|
||||
panic(err.Error())
|
||||
}
|
||||
|
||||
node := net.GetNode(nodeConfig.ID).Node.(*adapters.SimNode)
|
||||
peers := make([]*adapters.NodeConfig, nodeCount)
|
||||
nodes := make([]*enode.Node, nodeCount)
|
||||
for i := 0; i < nodeCount; i++ {
|
||||
peers[i] = adapters.RandomNodeConfig()
|
||||
peers[i].Services = []string{"mock"}
|
||||
if _, err := net.NewNodeWithConfig(peers[i]); err != nil {
|
||||
panic(fmt.Sprintf("error initializing peer %v: %v", peers[i].ID, err))
|
||||
}
|
||||
if err := net.Start(peers[i].ID); err != nil {
|
||||
panic(fmt.Sprintf("error starting peer %v: %v", peers[i].ID, err))
|
||||
}
|
||||
nodes[i] = peers[i].Node()
|
||||
}
|
||||
events := make(chan *p2p.PeerEvent, 1000)
|
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node.SubscribeEvents(events)
|
||||
ps := &ProtocolSession{
|
||||
Server: node.Server(),
|
||||
Nodes: nodes,
|
||||
adapter: adapter,
|
||||
events: events,
|
||||
}
|
||||
self := &ProtocolTester{
|
||||
ProtocolSession: ps,
|
||||
network: net,
|
||||
}
|
||||
|
||||
self.Connect(nodeConfig.ID, peers...)
|
||||
|
||||
return self
|
||||
}
|
||||
|
||||
// Stop stops the p2p server
|
||||
func (t *ProtocolTester) Stop() {
|
||||
t.Server.Stop()
|
||||
t.network.Shutdown()
|
||||
}
|
||||
|
||||
// Connect brings up the remote peer node and connects it using the
|
||||
// p2p/simulations network connection with the in memory network adapter
|
||||
func (t *ProtocolTester) Connect(selfID enode.ID, peers ...*adapters.NodeConfig) {
|
||||
for _, peer := range peers {
|
||||
log.Trace(fmt.Sprintf("connect to %v", peer.ID))
|
||||
if err := t.network.Connect(selfID, peer.ID); err != nil {
|
||||
panic(fmt.Sprintf("error connecting to peer %v: %v", peer.ID, err))
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// testNode wraps a protocol run function and implements the node.Service
|
||||
// interface
|
||||
type testNode struct {
|
||||
run func(*p2p.Peer, p2p.MsgReadWriter) error
|
||||
}
|
||||
|
||||
func (t *testNode) Protocols() []p2p.Protocol {
|
||||
return []p2p.Protocol{{
|
||||
Length: 100,
|
||||
Run: t.run,
|
||||
}}
|
||||
}
|
||||
|
||||
func (t *testNode) APIs() []rpc.API {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (t *testNode) Start(server *p2p.Server) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (t *testNode) Stop() error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// mockNode is a testNode which doesn't actually run a protocol, instead
|
||||
// exposing channels so that tests can manually trigger and expect certain
|
||||
// messages
|
||||
type mockNode struct {
|
||||
testNode
|
||||
|
||||
trigger chan *Trigger
|
||||
expect chan []Expect
|
||||
err chan error
|
||||
stop chan struct{}
|
||||
stopOnce sync.Once
|
||||
}
|
||||
|
||||
func newMockNode() *mockNode {
|
||||
mock := &mockNode{
|
||||
trigger: make(chan *Trigger),
|
||||
expect: make(chan []Expect),
|
||||
err: make(chan error),
|
||||
stop: make(chan struct{}),
|
||||
}
|
||||
mock.testNode.run = mock.Run
|
||||
return mock
|
||||
}
|
||||
|
||||
// Run is a protocol run function which just loops waiting for tests to
|
||||
// instruct it to either trigger or expect a message from the peer
|
||||
func (m *mockNode) Run(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
|
||||
for {
|
||||
select {
|
||||
case trig := <-m.trigger:
|
||||
wmsg := Wrap(trig.Msg)
|
||||
m.err <- p2p.Send(rw, trig.Code, wmsg)
|
||||
case exps := <-m.expect:
|
||||
m.err <- expectMsgs(rw, exps)
|
||||
case <-m.stop:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (m *mockNode) Trigger(trig *Trigger) error {
|
||||
m.trigger <- trig
|
||||
return <-m.err
|
||||
}
|
||||
|
||||
func (m *mockNode) Expect(exp ...Expect) error {
|
||||
m.expect <- exp
|
||||
return <-m.err
|
||||
}
|
||||
|
||||
func (m *mockNode) Stop() error {
|
||||
m.stopOnce.Do(func() { close(m.stop) })
|
||||
return nil
|
||||
}
|
||||
|
||||
func expectMsgs(rw p2p.MsgReadWriter, exps []Expect) error {
|
||||
matched := make([]bool, len(exps))
|
||||
for {
|
||||
msg, err := rw.ReadMsg()
|
||||
if err != nil {
|
||||
if err == io.EOF {
|
||||
break
|
||||
}
|
||||
return err
|
||||
}
|
||||
actualContent, err := ioutil.ReadAll(msg.Payload)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
var found bool
|
||||
for i, exp := range exps {
|
||||
if exp.Code == msg.Code && bytes.Equal(actualContent, mustEncodeMsg(Wrap(exp.Msg))) {
|
||||
if matched[i] {
|
||||
return fmt.Errorf("message #%d received two times", i)
|
||||
}
|
||||
matched[i] = true
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !found {
|
||||
expected := make([]string, 0)
|
||||
for i, exp := range exps {
|
||||
if matched[i] {
|
||||
continue
|
||||
}
|
||||
expected = append(expected, fmt.Sprintf("code %d payload %x", exp.Code, mustEncodeMsg(Wrap(exp.Msg))))
|
||||
}
|
||||
return fmt.Errorf("unexpected message code %d payload %x, expected %s", msg.Code, actualContent, strings.Join(expected, " or "))
|
||||
}
|
||||
done := true
|
||||
for _, m := range matched {
|
||||
if !m {
|
||||
done = false
|
||||
break
|
||||
}
|
||||
}
|
||||
if done {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
for i, m := range matched {
|
||||
if !m {
|
||||
return fmt.Errorf("expected message #%d not received", i)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// mustEncodeMsg uses rlp to encode a message.
|
||||
// In case of error it panics.
|
||||
func mustEncodeMsg(msg interface{}) []byte {
|
||||
contentEnc, err := rlp.EncodeToBytes(msg)
|
||||
if err != nil {
|
||||
panic("content encode error: " + err.Error())
|
||||
}
|
||||
return contentEnc
|
||||
}
|
||||
|
||||
type WrappedMsg struct {
|
||||
Context []byte
|
||||
Size uint32
|
||||
Payload []byte
|
||||
}
|
||||
|
||||
func Wrap(msg interface{}) interface{} {
|
||||
data, _ := rlp.EncodeToBytes(msg)
|
||||
return &WrappedMsg{
|
||||
Size: uint32(len(data)),
|
||||
Payload: data,
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue