Copy codebase from eth

1 files changed, 201 insertions, 0 deletions

diff --git a/dex/helper_test.go b/dex/helper_test.go
new file mode 100644
index 000000000..3d2ab0aba
--- /dev/null
+++ b/dex/helper_test.go
@@ -0,0 +1,201 @@
+// Copyright 2015 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/>.
+
+// This file contains some shares testing functionality, common to  multiple
+// different files and modules being tested.
+
+package eth
+
+import (
+	"crypto/ecdsa"
+	"crypto/rand"
+	"math/big"
+	"sort"
+	"sync"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/consensus/ethash"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/eth/downloader"
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/p2p/discover"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+var (
+	testBankKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
+	testBank       = crypto.PubkeyToAddress(testBankKey.PublicKey)
+)
+
+// newTestProtocolManager creates a new protocol manager for testing purposes,
+// with the given number of blocks already known, and potential notification
+// channels for different events.
+func newTestProtocolManager(mode downloader.SyncMode, blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) (*ProtocolManager, *ethdb.MemDatabase, error) {
+	var (
+		evmux  = new(event.TypeMux)
+		engine = ethash.NewFaker()
+		db     = ethdb.NewMemDatabase()
+		gspec  = &core.Genesis{
+			Config: params.TestChainConfig,
+			Alloc:  core.GenesisAlloc{testBank: {Balance: big.NewInt(1000000)}},
+		}
+		genesis       = gspec.MustCommit(db)
+		blockchain, _ = core.NewBlockChain(db, nil, gspec.Config, engine, vm.Config{})
+	)
+	chain, _ := core.GenerateChain(gspec.Config, genesis, ethash.NewFaker(), db, blocks, generator)
+	if _, err := blockchain.InsertChain(chain); err != nil {
+		panic(err)
+	}
+
+	pm, err := NewProtocolManager(gspec.Config, mode, DefaultConfig.NetworkId, evmux, &testTxPool{added: newtx}, engine, blockchain, db)
+	if err != nil {
+		return nil, nil, err
+	}
+	pm.Start(1000)
+	return pm, db, nil
+}
+
+// newTestProtocolManagerMust creates a new protocol manager for testing purposes,
+// with the given number of blocks already known, and potential notification
+// channels for different events. In case of an error, the constructor force-
+// fails the test.
+func newTestProtocolManagerMust(t *testing.T, mode downloader.SyncMode, blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) (*ProtocolManager, *ethdb.MemDatabase) {
+	pm, db, err := newTestProtocolManager(mode, blocks, generator, newtx)
+	if err != nil {
+		t.Fatalf("Failed to create protocol manager: %v", err)
+	}
+	return pm, db
+}
+
+// testTxPool is a fake, helper transaction pool for testing purposes
+type testTxPool struct {
+	txFeed event.Feed
+	pool   []*types.Transaction        // Collection of all transactions
+	added  chan<- []*types.Transaction // Notification channel for new transactions
+
+	lock sync.RWMutex // Protects the transaction pool
+}
+
+// AddRemotes appends a batch of transactions to the pool, and notifies any
+// listeners if the addition channel is non nil
+func (p *testTxPool) AddRemotes(txs []*types.Transaction) []error {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+
+	p.pool = append(p.pool, txs...)
+	if p.added != nil {
+		p.added <- txs
+	}
+	return make([]error, len(txs))
+}
+
+// Pending returns all the transactions known to the pool
+func (p *testTxPool) Pending() (map[common.Address]types.Transactions, error) {
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+
+	batches := make(map[common.Address]types.Transactions)
+	for _, tx := range p.pool {
+		from, _ := types.Sender(types.HomesteadSigner{}, tx)
+		batches[from] = append(batches[from], tx)
+	}
+	for _, batch := range batches {
+		sort.Sort(types.TxByNonce(batch))
+	}
+	return batches, nil
+}
+
+func (p *testTxPool) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
+	return p.txFeed.Subscribe(ch)
+}
+
+// newTestTransaction create a new dummy transaction.
+func newTestTransaction(from *ecdsa.PrivateKey, nonce uint64, datasize int) *types.Transaction {
+	tx := types.NewTransaction(nonce, common.Address{}, big.NewInt(0), 100000, big.NewInt(0), make([]byte, datasize))
+	tx, _ = types.SignTx(tx, types.HomesteadSigner{}, from)
+	return tx
+}
+
+// testPeer is a simulated peer to allow testing direct network calls.
+type testPeer struct {
+	net p2p.MsgReadWriter // Network layer reader/writer to simulate remote messaging
+	app *p2p.MsgPipeRW    // Application layer reader/writer to simulate the local side
+	*peer
+}
+
+// newTestPeer creates a new peer registered at the given protocol manager.
+func newTestPeer(name string, version int, pm *ProtocolManager, shake bool) (*testPeer, <-chan error) {
+	// Create a message pipe to communicate through
+	app, net := p2p.MsgPipe()
+
+	// Generate a random id and create the peer
+	var id discover.NodeID
+	rand.Read(id[:])
+
+	peer := pm.newPeer(version, p2p.NewPeer(id, name, nil), net)
+
+	// Start the peer on a new thread
+	errc := make(chan error, 1)
+	go func() {
+		select {
+		case pm.newPeerCh <- peer:
+			errc <- pm.handle(peer)
+		case <-pm.quitSync:
+			errc <- p2p.DiscQuitting
+		}
+	}()
+	tp := &testPeer{app: app, net: net, peer: peer}
+	// Execute any implicitly requested handshakes and return
+	if shake {
+		var (
+			genesis = pm.blockchain.Genesis()
+			head    = pm.blockchain.CurrentHeader()
+			td      = pm.blockchain.GetTd(head.Hash(), head.Number.Uint64())
+		)
+		tp.handshake(nil, td, head.Hash(), genesis.Hash())
+	}
+	return tp, errc
+}
+
+// handshake simulates a trivial handshake that expects the same state from the
+// remote side as we are simulating locally.
+func (p *testPeer) handshake(t *testing.T, td *big.Int, head common.Hash, genesis common.Hash) {
+	msg := &statusData{
+		ProtocolVersion: uint32(p.version),
+		NetworkId:       DefaultConfig.NetworkId,
+		TD:              td,
+		CurrentBlock:    head,
+		GenesisBlock:    genesis,
+	}
+	if err := p2p.ExpectMsg(p.app, StatusMsg, msg); err != nil {
+		t.Fatalf("status recv: %v", err)
+	}
+	if err := p2p.Send(p.app, StatusMsg, msg); err != nil {
+		t.Fatalf("status send: %v", err)
+	}
+}
+
+// close terminates the local side of the peer, notifying the remote protocol
+// manager of termination.
+func (p *testPeer) close() {
+	p.app.Close()
+}