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// Copyright 2018 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 core
import (
"testing"
"time"
"github.com/stretchr/testify/suite"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core/types"
)
// slowApp is an Application instance slow things down in every method.
type slowApp struct {
sleep time.Duration
blockConfirmed map[common.Hash]struct{}
blockDelivered map[common.Hash]struct{}
}
func newSlowApp(sleep time.Duration) *slowApp {
return &slowApp{
sleep: sleep,
blockConfirmed: make(map[common.Hash]struct{}),
blockDelivered: make(map[common.Hash]struct{}),
}
}
func (app *slowApp) PreparePayload(_ types.Position) ([]byte, error) {
return []byte{}, nil
}
func (app *slowApp) PrepareWitness(_ uint64) (types.Witness, error) {
return types.Witness{}, nil
}
func (app *slowApp) VerifyBlock(_ *types.Block) types.BlockVerifyStatus {
return types.VerifyOK
}
func (app *slowApp) BlockConfirmed(block types.Block) {
time.Sleep(app.sleep)
app.blockConfirmed[block.Hash] = struct{}{}
}
func (app *slowApp) BlockDelivered(blockHash common.Hash,
blockPosition types.Position, _ []byte) {
time.Sleep(app.sleep)
app.blockDelivered[blockHash] = struct{}{}
}
func (app *slowApp) BlockReceived(hash common.Hash) {}
func (app *slowApp) BlockReady(hash common.Hash) {}
// noDebugApp is to make sure nonBlocking works when Debug interface
// is not implemented by the provided Application instance.
type noDebugApp struct {
blockConfirmed map[common.Hash]struct{}
blockDelivered map[common.Hash]struct{}
}
func newNoDebugApp() *noDebugApp {
return &noDebugApp{
blockConfirmed: make(map[common.Hash]struct{}),
blockDelivered: make(map[common.Hash]struct{}),
}
}
func (app *noDebugApp) PreparePayload(_ types.Position) ([]byte, error) {
panic("test")
}
func (app *noDebugApp) PrepareWitness(_ uint64) (types.Witness, error) {
panic("test")
}
func (app *noDebugApp) VerifyBlock(_ *types.Block) types.BlockVerifyStatus {
panic("test")
}
func (app *noDebugApp) BlockConfirmed(block types.Block) {
app.blockConfirmed[block.Hash] = struct{}{}
}
func (app *noDebugApp) BlockDelivered(blockHash common.Hash,
blockPosition types.Position, _ []byte) {
app.blockDelivered[blockHash] = struct{}{}
}
type NonBlockingTestSuite struct {
suite.Suite
}
func (s *NonBlockingTestSuite) TestNonBlocking() {
sleep := 50 * time.Millisecond
app := newSlowApp(sleep)
nbModule := newNonBlocking(app, app)
hashes := make(common.Hashes, 10)
for idx := range hashes {
hashes[idx] = common.NewRandomHash()
}
now := time.Now().UTC()
shouldFinish := now.Add(100 * time.Millisecond)
// Start doing some 'heavy' job.
for _, hash := range hashes {
nbModule.BlockConfirmed(types.Block{
Hash: hash,
Witness: types.Witness{},
})
nbModule.BlockDelivered(hash, types.Position{}, []byte(nil))
}
// nonBlocking should be non-blocking.
s.True(shouldFinish.After(time.Now().UTC()))
nbModule.wait()
for _, hash := range hashes {
s.Contains(app.blockConfirmed, hash)
s.Contains(app.blockDelivered, hash)
}
}
func (s *NonBlockingTestSuite) TestNoDebug() {
app := newNoDebugApp()
nbModule := newNonBlocking(app, nil)
hash := common.NewRandomHash()
// Test BlockConfirmed.
nbModule.BlockConfirmed(types.Block{Hash: hash})
// Test BlockDelivered
nbModule.BlockDelivered(hash, types.Position{}, []byte(nil))
nbModule.wait()
s.Contains(app.blockConfirmed, hash)
s.Contains(app.blockDelivered, hash)
// Test other synchronous methods.
s.Panics(func() { nbModule.PreparePayload(types.Position{}) })
s.Panics(func() { nbModule.PrepareWitness(0) })
s.Panics(func() { nbModule.VerifyBlock(nil) })
}
func TestNonBlocking(t *testing.T) {
suite.Run(t, new(NonBlockingTestSuite))
}
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