path: root/light/txpool_test.go

// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package light

import (
    "context"
    "math"
    "math/big"
    "testing"
    "time"

    "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/ethdb"
    "github.com/ethereum/go-ethereum/params"
)

type testTxRelay struct {
    send, discard, mined chan int
}

func (self *testTxRelay) Send(txs types.Transactions) {
    self.send <- len(txs)
}

func (self *testTxRelay) NewHead(head common.Hash, mined []common.Hash, rollback []common.Hash) {
    m := len(mined)
    if m != 0 {
        self.mined <- m
    }
}

func (self *testTxRelay) Discard(hashes []common.Hash) {
    self.discard <- len(hashes)
}

const poolTestTxs = 1000
const poolTestBlocks = 100

// test tx 0..n-1
var testTx [poolTestTxs]*types.Transaction

// txs sent before block i
func sentTx(i int) int {
    return int(math.Pow(float64(i)/float64(poolTestBlocks), 0.9) * poolTestTxs)
}

// txs included in block i or before that (minedTx(i) <= sentTx(i))
func minedTx(i int) int {
    return int(math.Pow(float64(i)/float64(poolTestBlocks), 1.1) * poolTestTxs)
}

func txPoolTestChainGen(i int, block *core.BlockGen) {
    s := minedTx(i)
    e := minedTx(i + 1)
    for i := s; i < e; i++ {
        block.AddTx(testTx[i])
    }
}

func TestTxPool(t *testing.T) {
    for i := range testTx {
        testTx[i], _ = types.SignTx(types.NewTransaction(uint64(i), acc1Addr, big.NewInt(10000), bigTxGas, nil, nil), types.HomesteadSigner{}, testBankKey)
    }

    var (
        sdb, _  = ethdb.NewMemDatabase()
        ldb, _  = ethdb.NewMemDatabase()
        gspec   = core.Genesis{Alloc: core.GenesisAlloc{testBankAddress: {Balance: testBankFunds}}}
        genesis = gspec.MustCommit(sdb)
    )
    gspec.MustCommit(ldb)
    // Assemble the test environment
    blockchain, _ := core.NewBlockChain(sdb, params.TestChainConfig, ethash.NewFullFaker(), vm.Config{})
    gchain, _ := core.GenerateChain(params.TestChainConfig, genesis, sdb, poolTestBlocks, txPoolTestChainGen)
    if _, err := blockchain.InsertChain(gchain); err != nil {
        panic(err)
    }

    odr := &testOdr{sdb: sdb, ldb: ldb}
    relay := &testTxRelay{
        send:    make(chan int, 1),
        discard: make(chan int, 1),
        mined:   make(chan int, 1),
    }
    lightchain, _ := NewLightChain(odr, params.TestChainConfig, ethash.NewFullFaker())
    txPermanent = 50
    pool := NewTxPool(params.TestChainConfig, lightchain, relay)
    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
    defer cancel()

    for ii, block := range gchain {
        i := ii + 1
        s := sentTx(i - 1)
        e := sentTx(i)
        for i := s; i < e; i++ {
            pool.Add(ctx, testTx[i])
            got := <-relay.send
            exp := 1
            if got != exp {
                t.Errorf("relay.Send expected len = %d, got %d", exp, got)
            }
        }

        if _, err := lightchain.InsertHeaderChain([]*types.Header{block.Header()}, 1); err != nil {
            panic(err)
        }

        got := <-relay.mined
        exp := minedTx(i) - minedTx(i-1)
        if got != exp {
            t.Errorf("relay.NewHead expected len(mined) = %d, got %d", exp, got)
        }

        exp = 0
        if i > int(txPermanent)+1 {
            exp = minedTx(i-int(txPermanent)-1) - minedTx(i-int(txPermanent)-2)
        }
        if exp != 0 {
            got = <-relay.discard
            if got != exp {
                t.Errorf("relay.Discard expected len = %d, got %d", exp, got)
            }
        }
    }
}