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path: root/core/syncer/agreement_test.go
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// Copyright 2019 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus 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 dexon-consensus 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 dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.

package syncer

import (
    "testing"
    "time"

    "github.com/dexon-foundation/dexon-consensus/common"
    "github.com/dexon-foundation/dexon-consensus/core"
    "github.com/dexon-foundation/dexon-consensus/core/crypto"
    "github.com/dexon-foundation/dexon-consensus/core/test"
    "github.com/dexon-foundation/dexon-consensus/core/types"
    "github.com/dexon-foundation/dexon-consensus/core/utils"
    "github.com/stretchr/testify/suite"
)

type AgreementTestSuite struct {
    suite.Suite

    signers []*utils.Signer
    pubKeys []crypto.PublicKey
    prvKeys []crypto.PrivateKey
}

func (s *AgreementTestSuite) SetupSuite() {
    var err error
    s.prvKeys, s.pubKeys, err = test.NewKeys(4)
    s.Require().NoError(err)
    for _, k := range s.prvKeys {
        s.signers = append(s.signers, utils.NewSigner(k))
    }
}

func (s *AgreementTestSuite) prepareAgreementResult(pos types.Position,
    hash common.Hash) *types.AgreementResult {
    votes := []types.Vote{}
    for _, signer := range s.signers {
        v := types.NewVote(types.VoteCom, hash, 0)
        v.Position = pos
        s.Require().NoError(signer.SignVote(v))
        votes = append(votes, *v)
    }
    return &types.AgreementResult{
        BlockHash: hash,
        Position:  pos,
        Votes:     votes,
    }
}

func (s *AgreementTestSuite) prepareBlock(pos types.Position) *types.Block {
    b := &types.Block{
        Position: pos,
    }
    s.Require().NoError(s.signers[0].SignBlock(b))
    return b
}

func (s *AgreementTestSuite) TestFutureAgreementResult() {
    // Make sure future types.AgreementResult could be processed correctly
    // when corresponding CRS is ready.
    var (
        futureRound = uint64(7)
        pos         = types.Position{Round: 7, Height: 1000}
    )
    gov, err := test.NewGovernance(
        test.NewState(1, s.pubKeys, time.Second, &common.NullLogger{}, true),
        core.ConfigRoundShift,
    )
    s.Require().NoError(err)
    // Make sure goverance is ready for some future round, including CRS.
    gov.CatchUpWithRound(futureRound)
    for i := uint64(2); i <= futureRound; i++ {
        gov.ProposeCRS(i, common.NewRandomHash().Bytes())
    }
    s.Require().NoError(err)
    blockChan := make(chan *types.Block, 10)
    agr := newAgreement(blockChan, make(chan common.Hash, 100),
        utils.NewNodeSetCache(gov), &common.SimpleLogger{})
    go agr.run()
    block := s.prepareBlock(pos)
    result := s.prepareAgreementResult(pos, block.Hash)
    agr.inputChan <- result
    agr.inputChan <- block
    agr.inputChan <- futureRound
    select {
    case confirmedBlock := <-blockChan:
        s.Require().Equal(block.Hash, confirmedBlock.Hash)
    case <-time.After(2 * time.Second):
        s.Require().True(false)
    }
}

func TestAgreement(t *testing.T) {
    suite.Run(t, new(AgreementTestSuite))
}