525 lines
21 KiB
Go
525 lines
21 KiB
Go
// Copyright 2015 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 eth
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import (
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"math"
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"math/big"
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"math/rand"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/params"
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)
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var bigTxGas = new(big.Int).SetUint64(params.TxGas)
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// Tests that protocol versions and modes of operations are matched up properly.
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func TestProtocolCompatibility(t *testing.T) {
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// Define the compatibility chart
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tests := []struct {
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version uint
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mode downloader.SyncMode
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compatible bool
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}{
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{61, downloader.FullSync, true}, {62, downloader.FullSync, true}, {63, downloader.FullSync, true},
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{61, downloader.FastSync, false}, {62, downloader.FastSync, false}, {63, downloader.FastSync, true},
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}
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// Make sure anything we screw up is restored
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backup := ProtocolVersions
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defer func() { ProtocolVersions = backup }()
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// Try all available compatibility configs and check for errors
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for i, tt := range tests {
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ProtocolVersions = []uint{tt.version}
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pm, err := newTestProtocolManager(tt.mode, 0, nil, nil)
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if pm != nil {
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defer pm.Stop()
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}
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if (err == nil && !tt.compatible) || (err != nil && tt.compatible) {
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t.Errorf("test %d: compatibility mismatch: have error %v, want compatibility %v", i, err, tt.compatible)
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}
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}
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}
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// Tests that block headers can be retrieved from a remote chain based on user queries.
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func TestGetBlockHeaders62(t *testing.T) { testGetBlockHeaders(t, 62) }
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func TestGetBlockHeaders63(t *testing.T) { testGetBlockHeaders(t, 63) }
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func testGetBlockHeaders(t *testing.T, protocol int) {
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pm := newTestProtocolManagerMust(t, downloader.FullSync, downloader.MaxHashFetch+15, nil, nil)
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peer, _ := newTestPeer("peer", protocol, pm, true)
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defer peer.close()
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// Create a "random" unknown hash for testing
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var unknown common.Hash
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for i := range unknown {
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unknown[i] = byte(i)
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}
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// Create a batch of tests for various scenarios
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limit := uint64(downloader.MaxHeaderFetch)
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tests := []struct {
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query *getBlockHeadersData // The query to execute for header retrieval
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expect []common.Hash // The hashes of the block whose headers are expected
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}{
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// A single random block should be retrievable by hash and number too
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(limit / 2).Hash()}, Amount: 1},
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[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 1},
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[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
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},
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// Multiple headers should be retrievable in both directions
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 1).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 2).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 1).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 2).Hash(),
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},
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},
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// Multiple headers with skip lists should be retrievable
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 4).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 + 8).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 4).Hash(),
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pm.blockchain.GetBlockByNumber(limit/2 - 8).Hash(),
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},
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},
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// The chain endpoints should be retrievable
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: 0}, Amount: 1},
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[]common.Hash{pm.blockchain.GetBlockByNumber(0).Hash()},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64()}, Amount: 1},
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[]common.Hash{pm.blockchain.CurrentBlock().Hash()},
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},
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// Ensure protocol limits are honored
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
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pm.blockchain.GetBlockHashesFromHash(pm.blockchain.CurrentBlock().Hash(), limit),
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},
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// Check that requesting more than available is handled gracefully
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64()).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(4).Hash(),
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pm.blockchain.GetBlockByNumber(0).Hash(),
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},
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},
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// Check that requesting more than available is handled gracefully, even if mid skip
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
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pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 1).Hash(),
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},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(4).Hash(),
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pm.blockchain.GetBlockByNumber(1).Hash(),
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},
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},
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// Check a corner case where requesting more can iterate past the endpoints
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{
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&getBlockHeadersData{Origin: hashOrNumber{Number: 2}, Amount: 5, Reverse: true},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(2).Hash(),
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pm.blockchain.GetBlockByNumber(1).Hash(),
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pm.blockchain.GetBlockByNumber(0).Hash(),
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},
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},
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// Check a corner case where skipping overflow loops back into the chain start
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(3).Hash()}, Amount: 2, Reverse: false, Skip: math.MaxUint64 - 1},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(3).Hash(),
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},
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},
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// Check a corner case where skipping overflow loops back to the same header
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(1).Hash()}, Amount: 2, Reverse: false, Skip: math.MaxUint64},
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[]common.Hash{
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pm.blockchain.GetBlockByNumber(1).Hash(),
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},
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},
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// Check that non existing headers aren't returned
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{
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&getBlockHeadersData{Origin: hashOrNumber{Hash: unknown}, Amount: 1},
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[]common.Hash{},
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}, {
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&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() + 1}, Amount: 1},
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[]common.Hash{},
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},
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}
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// Run each of the tests and verify the results against the chain
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for i, tt := range tests {
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// Collect the headers to expect in the response
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headers := []*types.Header{}
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for _, hash := range tt.expect {
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headers = append(headers, pm.blockchain.GetBlockByHash(hash).Header())
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}
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// Send the hash request and verify the response
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p2p.Send(peer.app, 0x03, tt.query)
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if err := p2p.ExpectMsg(peer.app, 0x04, headers); err != nil {
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t.Errorf("test %d: headers mismatch: %v", i, err)
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}
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// If the test used number origins, repeat with hashes as the too
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if tt.query.Origin.Hash == (common.Hash{}) {
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if origin := pm.blockchain.GetBlockByNumber(tt.query.Origin.Number); origin != nil {
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tt.query.Origin.Hash, tt.query.Origin.Number = origin.Hash(), 0
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p2p.Send(peer.app, 0x03, tt.query)
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if err := p2p.ExpectMsg(peer.app, 0x04, headers); err != nil {
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t.Errorf("test %d: headers mismatch: %v", i, err)
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}
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}
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}
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}
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}
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// Tests that block contents can be retrieved from a remote chain based on their hashes.
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func TestGetBlockBodies62(t *testing.T) { testGetBlockBodies(t, 62) }
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func TestGetBlockBodies63(t *testing.T) { testGetBlockBodies(t, 63) }
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func testGetBlockBodies(t *testing.T, protocol int) {
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pm := newTestProtocolManagerMust(t, downloader.FullSync, downloader.MaxBlockFetch+15, nil, nil)
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peer, _ := newTestPeer("peer", protocol, pm, true)
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defer peer.close()
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// Create a batch of tests for various scenarios
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limit := downloader.MaxBlockFetch
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tests := []struct {
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random int // Number of blocks to fetch randomly from the chain
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explicit []common.Hash // Explicitly requested blocks
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available []bool // Availability of explicitly requested blocks
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expected int // Total number of existing blocks to expect
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}{
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{1, nil, nil, 1}, // A single random block should be retrievable
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{10, nil, nil, 10}, // Multiple random blocks should be retrievable
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{limit, nil, nil, limit}, // The maximum possible blocks should be retrievable
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{limit + 1, nil, nil, limit}, // No more than the possible block count should be returned
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{0, []common.Hash{pm.blockchain.Genesis().Hash()}, []bool{true}, 1}, // The genesis block should be retrievable
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{0, []common.Hash{pm.blockchain.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
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{0, []common.Hash{{}}, []bool{false}, 0}, // A non existent block should not be returned
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// Existing and non-existing blocks interleaved should not cause problems
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{0, []common.Hash{
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{},
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pm.blockchain.GetBlockByNumber(1).Hash(),
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{},
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pm.blockchain.GetBlockByNumber(10).Hash(),
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{},
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pm.blockchain.GetBlockByNumber(100).Hash(),
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{},
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}, []bool{false, true, false, true, false, true, false}, 3},
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}
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// Run each of the tests and verify the results against the chain
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for i, tt := range tests {
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// Collect the hashes to request, and the response to expect
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hashes, seen := []common.Hash{}, make(map[int64]bool)
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bodies := []*blockBody{}
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for j := 0; j < tt.random; j++ {
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for {
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num := rand.Int63n(int64(pm.blockchain.CurrentBlock().NumberU64()))
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if !seen[num] {
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seen[num] = true
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block := pm.blockchain.GetBlockByNumber(uint64(num))
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hashes = append(hashes, block.Hash())
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if len(bodies) < tt.expected {
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bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
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}
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break
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}
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}
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}
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for j, hash := range tt.explicit {
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hashes = append(hashes, hash)
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if tt.available[j] && len(bodies) < tt.expected {
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block := pm.blockchain.GetBlockByHash(hash)
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bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
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}
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}
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// Send the hash request and verify the response
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p2p.Send(peer.app, 0x05, hashes)
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if err := p2p.ExpectMsg(peer.app, 0x06, bodies); err != nil {
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t.Errorf("test %d: bodies mismatch: %v", i, err)
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}
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}
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}
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// Tests that the node state database can be retrieved based on hashes.
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func TestGetNodeData63(t *testing.T) { testGetNodeData(t, 63) }
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func testGetNodeData(t *testing.T, protocol int) {
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// Define three accounts to simulate transactions with
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acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
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acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
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acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
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acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)
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signer := types.HomesteadSigner{}
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// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_markets_test)
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generator := func(i int, block *core.BlockGen) {
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switch i {
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case 0:
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// In block 1, the test bank sends account #1 some ether.
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tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(10000), bigTxGas, nil, nil), signer, testBankKey)
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block.AddTx(tx)
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case 1:
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// In block 2, the test bank sends some more ether to account #1.
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// acc1Addr passes it on to account #2.
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tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(1000), bigTxGas, nil, nil), signer, testBankKey)
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tx2, _ := types.SignTx(types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), bigTxGas, nil, nil), signer, acc1Key)
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block.AddTx(tx1)
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block.AddTx(tx2)
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case 2:
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// Block 3 is empty but was mined by account #2.
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block.SetCoinbase(acc2Addr)
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block.SetExtra([]byte("yeehaw"))
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case 3:
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// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
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b2 := block.PrevBlock(1).Header()
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b2.Extra = []byte("foo")
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block.AddUncle(b2)
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b3 := block.PrevBlock(2).Header()
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b3.Extra = []byte("foo")
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block.AddUncle(b3)
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}
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}
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// Assemble the test environment
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pm := newTestProtocolManagerMust(t, downloader.FullSync, 4, generator, nil)
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peer, _ := newTestPeer("peer", protocol, pm, true)
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defer peer.close()
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// Fetch for now the entire chain db
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hashes := []common.Hash{}
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for _, key := range pm.chaindb.(*ethdb.MemDatabase).Keys() {
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if len(key) == len(common.Hash{}) {
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hashes = append(hashes, common.BytesToHash(key))
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}
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}
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p2p.Send(peer.app, 0x0d, hashes)
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msg, err := peer.app.ReadMsg()
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if err != nil {
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t.Fatalf("failed to read node data response: %v", err)
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}
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if msg.Code != 0x0e {
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t.Fatalf("response packet code mismatch: have %x, want %x", msg.Code, 0x0c)
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}
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var data [][]byte
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if err := msg.Decode(&data); err != nil {
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t.Fatalf("failed to decode response node data: %v", err)
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}
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// Verify that all hashes correspond to the requested data, and reconstruct a state tree
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for i, want := range hashes {
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if hash := crypto.Keccak256Hash(data[i]); hash != want {
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t.Errorf("data hash mismatch: have %x, want %x", hash, want)
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}
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}
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statedb, _ := ethdb.NewMemDatabase()
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for i := 0; i < len(data); i++ {
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statedb.Put(hashes[i].Bytes(), data[i])
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}
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accounts := []common.Address{testBank, acc1Addr, acc2Addr}
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for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
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trie, _ := state.New(pm.blockchain.GetBlockByNumber(i).Root(), state.NewDatabase(statedb))
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for j, acc := range accounts {
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state, _ := pm.blockchain.State()
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bw := state.GetBalance(acc)
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bh := trie.GetBalance(acc)
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if (bw != nil && bh == nil) || (bw == nil && bh != nil) {
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t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
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}
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if bw != nil && bh != nil && bw.Cmp(bw) != 0 {
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t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
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}
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}
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}
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}
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// Tests that the transaction receipts can be retrieved based on hashes.
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func TestGetReceipt63(t *testing.T) { testGetReceipt(t, 63) }
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func testGetReceipt(t *testing.T, protocol int) {
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// Define three accounts to simulate transactions with
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acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
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acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
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acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
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acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)
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signer := types.HomesteadSigner{}
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// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_markets_test)
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generator := func(i int, block *core.BlockGen) {
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switch i {
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case 0:
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// In block 1, the test bank sends account #1 some ether.
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tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(10000), bigTxGas, nil, nil), signer, testBankKey)
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block.AddTx(tx)
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case 1:
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// In block 2, the test bank sends some more ether to account #1.
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// acc1Addr passes it on to account #2.
|
|
tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank), acc1Addr, big.NewInt(1000), bigTxGas, nil, nil), signer, testBankKey)
|
|
tx2, _ := types.SignTx(types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), bigTxGas, nil, nil), signer, acc1Key)
|
|
block.AddTx(tx1)
|
|
block.AddTx(tx2)
|
|
case 2:
|
|
// Block 3 is empty but was mined by account #2.
|
|
block.SetCoinbase(acc2Addr)
|
|
block.SetExtra([]byte("yeehaw"))
|
|
case 3:
|
|
// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
|
|
b2 := block.PrevBlock(1).Header()
|
|
b2.Extra = []byte("foo")
|
|
block.AddUncle(b2)
|
|
b3 := block.PrevBlock(2).Header()
|
|
b3.Extra = []byte("foo")
|
|
block.AddUncle(b3)
|
|
}
|
|
}
|
|
// Assemble the test environment
|
|
pm := newTestProtocolManagerMust(t, downloader.FullSync, 4, generator, nil)
|
|
peer, _ := newTestPeer("peer", protocol, pm, true)
|
|
defer peer.close()
|
|
|
|
// Collect the hashes to request, and the response to expect
|
|
hashes, receipts := []common.Hash{}, []types.Receipts{}
|
|
for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
|
|
block := pm.blockchain.GetBlockByNumber(i)
|
|
|
|
hashes = append(hashes, block.Hash())
|
|
receipts = append(receipts, core.GetBlockReceipts(pm.chaindb, block.Hash(), block.NumberU64()))
|
|
}
|
|
// Send the hash request and verify the response
|
|
p2p.Send(peer.app, 0x0f, hashes)
|
|
if err := p2p.ExpectMsg(peer.app, 0x10, receipts); err != nil {
|
|
t.Errorf("receipts mismatch: %v", err)
|
|
}
|
|
}
|
|
|
|
// Tests that post eth protocol handshake, DAO fork-enabled clients also execute
|
|
// a DAO "challenge" verifying each others' DAO fork headers to ensure they're on
|
|
// compatible chains.
|
|
func TestDAOChallengeNoVsNo(t *testing.T) { testDAOChallenge(t, false, false, false) }
|
|
func TestDAOChallengeNoVsPro(t *testing.T) { testDAOChallenge(t, false, true, false) }
|
|
func TestDAOChallengeProVsNo(t *testing.T) { testDAOChallenge(t, true, false, false) }
|
|
func TestDAOChallengeProVsPro(t *testing.T) { testDAOChallenge(t, true, true, false) }
|
|
func TestDAOChallengeNoVsTimeout(t *testing.T) { testDAOChallenge(t, false, false, true) }
|
|
func TestDAOChallengeProVsTimeout(t *testing.T) { testDAOChallenge(t, true, true, true) }
|
|
|
|
func testDAOChallenge(t *testing.T, localForked, remoteForked bool, timeout bool) {
|
|
// Reduce the DAO handshake challenge timeout
|
|
if timeout {
|
|
defer func(old time.Duration) { daoChallengeTimeout = old }(daoChallengeTimeout)
|
|
daoChallengeTimeout = 500 * time.Millisecond
|
|
}
|
|
// Create a DAO aware protocol manager
|
|
var (
|
|
evmux = new(event.TypeMux)
|
|
pow = ethash.NewFaker()
|
|
db, _ = ethdb.NewMemDatabase()
|
|
config = ¶ms.ChainConfig{DAOForkBlock: big.NewInt(1), DAOForkSupport: localForked}
|
|
gspec = &core.Genesis{Config: config}
|
|
genesis = gspec.MustCommit(db)
|
|
blockchain, _ = core.NewBlockChain(db, config, pow, vm.Config{})
|
|
)
|
|
pm, err := NewProtocolManager(config, downloader.FullSync, DefaultConfig.NetworkId, evmux, new(testTxPool), pow, blockchain, db)
|
|
if err != nil {
|
|
t.Fatalf("failed to start test protocol manager: %v", err)
|
|
}
|
|
pm.Start(1000)
|
|
defer pm.Stop()
|
|
|
|
// Connect a new peer and check that we receive the DAO challenge
|
|
peer, _ := newTestPeer("peer", eth63, pm, true)
|
|
defer peer.close()
|
|
|
|
challenge := &getBlockHeadersData{
|
|
Origin: hashOrNumber{Number: config.DAOForkBlock.Uint64()},
|
|
Amount: 1,
|
|
Skip: 0,
|
|
Reverse: false,
|
|
}
|
|
if err := p2p.ExpectMsg(peer.app, GetBlockHeadersMsg, challenge); err != nil {
|
|
t.Fatalf("challenge mismatch: %v", err)
|
|
}
|
|
// Create a block to reply to the challenge if no timeout is simulated
|
|
if !timeout {
|
|
blocks, _ := core.GenerateChain(¶ms.ChainConfig{}, genesis, db, 1, func(i int, block *core.BlockGen) {
|
|
if remoteForked {
|
|
block.SetExtra(params.DAOForkBlockExtra)
|
|
}
|
|
})
|
|
if err := p2p.Send(peer.app, BlockHeadersMsg, []*types.Header{blocks[0].Header()}); err != nil {
|
|
t.Fatalf("failed to answer challenge: %v", err)
|
|
}
|
|
time.Sleep(100 * time.Millisecond) // Sleep to avoid the verification racing with the drops
|
|
} else {
|
|
// Otherwise wait until the test timeout passes
|
|
time.Sleep(daoChallengeTimeout + 500*time.Millisecond)
|
|
}
|
|
// Verify that depending on fork side, the remote peer is maintained or dropped
|
|
if localForked == remoteForked && !timeout {
|
|
if peers := pm.peers.Len(); peers != 1 {
|
|
t.Fatalf("peer count mismatch: have %d, want %d", peers, 1)
|
|
}
|
|
} else {
|
|
if peers := pm.peers.Len(); peers != 0 {
|
|
t.Fatalf("peer count mismatch: have %d, want %d", peers, 0)
|
|
}
|
|
}
|
|
}
|