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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 (
"sync"
"testing"
"time"
"github.com/stretchr/testify/suite"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core/types"
)
type WatchCatTestSuite struct {
suite.Suite
}
type testConfigAccessor struct {
notarySetSize uint32
}
func (cfg *testConfigAccessor) Configuration(uint64) *types.Config {
return &types.Config{
NotarySetSize: cfg.notarySetSize,
}
}
type recovery struct {
lock sync.RWMutex
votes map[uint64]uint64
}
func (rec *recovery) ProposeSkipBlock(height uint64) error {
rec.lock.Lock()
defer rec.lock.Unlock()
rec.votes[height]++
return nil
}
func (rec *recovery) Votes(height uint64) (uint64, error) {
rec.lock.RLock()
defer rec.lock.RUnlock()
return rec.votes[height], nil
}
func (s *WatchCatTestSuite) newWatchCat(
notarySetSize uint32, polling, timeout time.Duration) (*WatchCat, *recovery) {
cfg := &testConfigAccessor{
notarySetSize: notarySetSize,
}
recovery := &recovery{
votes: make(map[uint64]uint64),
}
wc := NewWatchCat(recovery, cfg, polling, timeout, &common.NullLogger{})
return wc, recovery
}
func (s *WatchCatTestSuite) TestBasicUsage() {
polling := 50 * time.Millisecond
timeout := 50 * time.Millisecond
notarySet := uint32(24)
watchCat, rec := s.newWatchCat(notarySet, polling, timeout)
watchCat.Start()
defer watchCat.Stop()
pos := types.Position{
Height: 10,
}
for i := 0; i < 10; i++ {
pos.Height++
watchCat.Feed(pos)
time.Sleep(timeout / 2)
select {
case <-watchCat.Meow():
s.FailNow("unexpected terminated")
default:
}
}
time.Sleep(timeout)
rec.lock.RLock()
s.Require().Equal(1, len(rec.votes))
s.Require().Equal(uint64(1), rec.votes[pos.Height])
rec.lock.RUnlock()
time.Sleep(polling * 2)
select {
case <-watchCat.Meow():
s.FailNow("unexpected terminated")
default:
}
rec.lock.Lock()
rec.votes[pos.Height] = uint64(notarySet/2 + 1)
rec.lock.Unlock()
time.Sleep(polling * 2)
select {
case <-watchCat.Meow():
default:
s.FailNow("expecting terminated")
}
s.Equal(pos, watchCat.LastPosition())
}
func TestWatchCat(t *testing.T) {
suite.Run(t, new(WatchCatTestSuite))
}
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