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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"
"time"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core/blockdb"
"github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
"github.com/stretchr/testify/suite"
)
type CompactionChainTestSuite struct {
suite.Suite
db blockdb.BlockDatabase
}
func (s *CompactionChainTestSuite) SetupTest() {
var err error
s.db, err = blockdb.NewMemBackedBlockDB()
s.Require().Nil(err)
}
func (s *CompactionChainTestSuite) newCompactionChain() *compactionChain {
return newCompactionChain(s.db)
}
func (s *CompactionChainTestSuite) generateBlocks(
size int, cc *compactionChain) []*types.Block {
now := time.Now().UTC()
blocks := make([]*types.Block, size)
for idx := range blocks {
blocks[idx] = &types.Block{
Hash: common.NewRandomHash(),
Witness: types.Witness{
Timestamp: now,
},
}
now = now.Add(100 * time.Millisecond)
}
for _, block := range blocks {
err := cc.processBlock(block)
s.Require().Nil(err)
}
return blocks
}
func (s *CompactionChainTestSuite) TestProcessBlock() {
cc := s.newCompactionChain()
now := time.Now().UTC()
blocks := make([]*types.Block, 10)
for idx := range blocks {
blocks[idx] = &types.Block{
Hash: common.NewRandomHash(),
Witness: types.Witness{
Timestamp: now,
},
}
now = now.Add(100 * time.Millisecond)
}
var prevBlock *types.Block
for _, block := range blocks {
s.Equal(cc.prevBlock, prevBlock)
err := cc.processBlock(block)
s.Require().Nil(err)
if prevBlock != nil {
s.Equal(block.Witness.Height, prevBlock.Witness.Height+1)
prevHash, err := hashWitness(prevBlock)
s.Require().Nil(err)
s.Equal(prevHash, block.Witness.ParentHash)
}
prevBlock = block
}
}
func (s *CompactionChainTestSuite) TestProcessWitnessAck() {
cc := s.newCompactionChain()
blocks := s.generateBlocks(10, cc)
prv1, err := ecdsa.NewPrivateKey()
s.Require().Nil(err)
prv2, err := ecdsa.NewPrivateKey()
s.Require().Nil(err)
nID1 := types.NewNodeID(prv1.PublicKey())
nID2 := types.NewNodeID(prv2.PublicKey())
auth1 := NewAuthenticator(prv1)
auth2 := NewAuthenticator(prv2)
witnessAcks1 := []*types.WitnessAck{}
witnessAcks2 := []*types.WitnessAck{}
for _, block := range blocks {
cc.prevBlock = block
witnessAck1, err := auth1.SignAsWitnessAck(block)
s.Require().Nil(err)
witnessAck2, err := auth2.SignAsWitnessAck(block)
s.Require().Nil(err)
witnessAcks1 = append(witnessAcks1, witnessAck1)
witnessAcks2 = append(witnessAcks2, witnessAck2)
}
// The acked block is not yet in db.
err = cc.processWitnessAck(witnessAcks1[0])
s.Nil(err)
s.Equal(0, len(cc.witnessAcks()))
err = cc.processWitnessAck(witnessAcks2[1])
s.Nil(err)
s.Equal(0, len(cc.witnessAcks()))
// Insert to block to db and trigger processPendingWitnessAck.
s.Require().Nil(s.db.Put(*blocks[0]))
s.Require().Nil(s.db.Put(*blocks[1]))
err = cc.processWitnessAck(witnessAcks1[2])
s.Nil(err)
s.Equal(2, len(cc.witnessAcks()))
// Test the witnessAcks should be the last witnessAck.
s.Require().Nil(s.db.Put(*blocks[2]))
s.Require().Nil(s.db.Put(*blocks[3]))
s.Nil(cc.processWitnessAck(witnessAcks1[3]))
acks := cc.witnessAcks()
s.Equal(blocks[3].Hash, acks[nID1].WitnessBlockHash)
s.Equal(blocks[1].Hash, acks[nID2].WitnessBlockHash)
// Test that witnessAck on less Witness.Height should be ignored.
s.Require().Nil(s.db.Put(*blocks[4]))
s.Require().Nil(s.db.Put(*blocks[5]))
s.Nil(cc.processWitnessAck(witnessAcks1[5]))
s.Nil(cc.processWitnessAck(witnessAcks2[5]))
s.Nil(cc.processWitnessAck(witnessAcks1[4]))
s.Nil(cc.processWitnessAck(witnessAcks2[4]))
acks = cc.witnessAcks()
s.Equal(blocks[5].Hash, acks[nID1].WitnessBlockHash)
s.Equal(blocks[5].Hash, acks[nID2].WitnessBlockHash)
}
func TestCompactionChain(t *testing.T) {
suite.Run(t, new(CompactionChainTestSuite))
}
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