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// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core 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-core 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-core library. If not, see
// <http://www.gnu.org/licenses/>.
package core
import (
"testing"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
"github.com/dexon-foundation/dexon-consensus-core/crypto"
"github.com/dexon-foundation/dexon-consensus-core/crypto/eth"
"github.com/stretchr/testify/suite"
)
// agreementTestReceiver implements core.agreementReceiveer
type agreementTestReceiver struct {
s *AgreementTestSuite
}
func (r *agreementTestReceiver) ProposeVote(vote *types.Vote) {
r.s.voteChan <- vote
}
func (r *agreementTestReceiver) ProposeBlock(block common.Hash) {
r.s.blockChan <- block
}
func (r *agreementTestReceiver) ConfirmBlock(block common.Hash) {
r.s.confirmChan <- block
}
func (s *AgreementTestSuite) proposeBlock(
agreementIdx int) *types.Block {
block := &types.Block{
ProposerID: s.ID,
Hash: common.NewRandomHash(),
}
s.block[block.Hash] = block
s.Require().Nil(s.agreement[agreementIdx].prepareBlock(block, s.prvKey[s.ID]))
return block
}
type AgreementTestSuite struct {
suite.Suite
ID types.ValidatorID
prvKey map[types.ValidatorID]crypto.PrivateKey
voteChan chan *types.Vote
blockChan chan common.Hash
confirmChan chan common.Hash
block map[common.Hash]*types.Block
agreement []*agreement
}
func (s *AgreementTestSuite) SetupTest() {
prvKey, err := eth.NewPrivateKey()
s.Require().Nil(err)
s.ID = types.NewValidatorID(prvKey.PublicKey())
s.prvKey = map[types.ValidatorID]crypto.PrivateKey{
s.ID: prvKey,
}
s.voteChan = make(chan *types.Vote, 100)
s.blockChan = make(chan common.Hash, 100)
s.confirmChan = make(chan common.Hash, 100)
s.block = make(map[common.Hash]*types.Block)
}
func (s *AgreementTestSuite) newAgreement(numValidator int) *agreement {
leader := newGenesisLeaderSelector("🖖👽", eth.SigToPub)
agreementIdx := len(s.agreement)
blockProposer := func() *types.Block {
return s.proposeBlock(agreementIdx)
}
validators := make(types.ValidatorIDs, numValidator-1)
for i := range validators {
prvKey, err := eth.NewPrivateKey()
s.Require().Nil(err)
validators[i] = types.NewValidatorID(prvKey.PublicKey())
s.prvKey[validators[i]] = prvKey
}
validators = append(validators, s.ID)
agreement := newAgreement(
s.ID,
&agreementTestReceiver{s},
validators,
leader,
eth.SigToPub,
blockProposer,
)
s.agreement = append(s.agreement, agreement)
return agreement
}
func (s *AgreementTestSuite) prepareVote(vote *types.Vote) {
prvKey, exist := s.prvKey[vote.ProposerID]
s.Require().True(exist)
hash := hashVote(vote)
var err error
vote.Signature, err = prvKey.Sign(hash)
s.Require().NoError(err)
}
func (s *AgreementTestSuite) copyVote(
vote *types.Vote, proposer types.ValidatorID) *types.Vote {
v := vote.Clone()
v.ProposerID = proposer
s.prepareVote(v)
return v
}
func (s *AgreementTestSuite) TestSimpleConfirm() {
a := s.newAgreement(4)
// PrepareState
a.nextState()
// AckState
s.Require().Len(s.blockChan, 1)
blockHash := <-s.blockChan
block, exist := s.block[blockHash]
s.Require().True(exist)
s.Require().NoError(a.processBlock(block))
a.nextState()
// ConfirmState
s.Require().Len(s.voteChan, 1)
vote := <-s.voteChan
s.Equal(types.VoteAck, vote.Type)
for vID := range s.prvKey {
v := s.copyVote(vote, vID)
s.Require().NoError(a.processVote(v))
}
a.nextState()
// Pass1State
s.Require().Len(s.voteChan, 1)
vote = <-s.voteChan
s.Equal(types.VoteConfirm, vote.Type)
for vID := range s.prvKey {
v := s.copyVote(vote, vID)
s.Require().NoError(a.processVote(v))
}
// We have enough of Confirm-Votes.
s.Require().Len(s.confirmChan, 1)
confirmBlock := <-s.confirmChan
s.Equal(blockHash, confirmBlock)
}
func TestAgreement(t *testing.T) {
suite.Run(t, new(AgreementTestSuite))
}
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