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package consensus
import (
"bytes"
"path/filepath"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/tendermint/tendermint/crypto/merkle"
"github.com/tendermint/tendermint/internal/consensus/types"
"github.com/tendermint/tendermint/internal/libs/autofile"
"github.com/tendermint/tendermint/libs/log"
tmtime "github.com/tendermint/tendermint/libs/time"
tmtypes "github.com/tendermint/tendermint/types"
)
const (
walTestFlushInterval = time.Duration(100) * time.Millisecond
)
func TestWALTruncate(t *testing.T) {
walDir := t.TempDir()
walFile := filepath.Join(walDir, "wal")
// this magic number 4K can truncate the content when RotateFile.
// defaultHeadSizeLimit(10M) is hard to simulate.
// this magic number 1 * time.Millisecond make RotateFile check frequently.
// defaultGroupCheckDuration(5s) is hard to simulate.
wal, err := NewWAL(walFile,
autofile.GroupHeadSizeLimit(4096),
autofile.GroupCheckDuration(1*time.Millisecond),
)
require.NoError(t, err)
wal.SetLogger(log.TestingLogger())
err = wal.Start()
require.NoError(t, err)
t.Cleanup(func() {
if err := wal.Stop(); err != nil {
t.Error(err)
}
// wait for the wal to finish shutting down so we
// can safely remove the directory
wal.Wait()
})
// 60 block's size nearly 70K, greater than group's headBuf size(4096 * 10),
// when headBuf is full, truncate content will Flush to the file. at this
// time, RotateFile is called, truncate content exist in each file.
err = WALGenerateNBlocks(t, wal.Group(), 60)
require.NoError(t, err)
time.Sleep(1 * time.Millisecond) // wait groupCheckDuration, make sure RotateFile run
if err := wal.FlushAndSync(); err != nil {
t.Error(err)
}
h := int64(50)
gr, found, err := wal.SearchForEndHeight(h, &WALSearchOptions{})
assert.NoError(t, err, "expected not to err on height %d", h)
assert.True(t, found, "expected to find end height for %d", h)
assert.NotNil(t, gr)
t.Cleanup(func() { _ = gr.Close() })
dec := NewWALDecoder(gr)
msg, err := dec.Decode()
assert.NoError(t, err, "expected to decode a message")
rs, ok := msg.Msg.(tmtypes.EventDataRoundState)
assert.True(t, ok, "expected message of type EventDataRoundState")
assert.Equal(t, rs.Height, h+1, "wrong height")
}
func TestWALEncoderDecoder(t *testing.T) {
now := tmtime.Now()
msgs := []TimedWALMessage{
{Time: now, Msg: EndHeightMessage{0}},
{Time: now, Msg: timeoutInfo{Duration: time.Second, Height: 1, Round: 1, Step: types.RoundStepPropose}},
{Time: now, Msg: tmtypes.EventDataRoundState{Height: 1, Round: 1, Step: ""}},
}
b := new(bytes.Buffer)
for _, msg := range msgs {
msg := msg
b.Reset()
enc := NewWALEncoder(b)
err := enc.Encode(&msg)
require.NoError(t, err)
dec := NewWALDecoder(b)
decoded, err := dec.Decode()
require.NoError(t, err)
assert.Equal(t, msg.Time.UTC(), decoded.Time)
assert.Equal(t, msg.Msg, decoded.Msg)
}
}
func TestWALWrite(t *testing.T) {
walDir := t.TempDir()
walFile := filepath.Join(walDir, "wal")
wal, err := NewWAL(walFile)
require.NoError(t, err)
err = wal.Start()
require.NoError(t, err)
t.Cleanup(func() {
if err := wal.Stop(); err != nil {
t.Error(err)
}
// wait for the wal to finish shutting down so we
// can safely remove the directory
wal.Wait()
})
// 1) Write returns an error if msg is too big
msg := &BlockPartMessage{
Height: 1,
Round: 1,
Part: &tmtypes.Part{
Index: 1,
Bytes: make([]byte, 1),
Proof: merkle.Proof{
Total: 1,
Index: 1,
LeafHash: make([]byte, maxMsgSizeBytes-30),
},
},
}
err = wal.Write(msgInfo{
Msg: msg,
})
if assert.Error(t, err) {
assert.Contains(t, err.Error(), "msg is too big")
}
}
func TestWALSearchForEndHeight(t *testing.T) {
walBody, err := WALWithNBlocks(t, 6)
if err != nil {
t.Fatal(err)
}
walFile := tempWALWithData(walBody)
wal, err := NewWAL(walFile)
require.NoError(t, err)
wal.SetLogger(log.TestingLogger())
h := int64(3)
gr, found, err := wal.SearchForEndHeight(h, &WALSearchOptions{})
assert.NoError(t, err, "expected not to err on height %d", h)
assert.True(t, found, "expected to find end height for %d", h)
assert.NotNil(t, gr)
t.Cleanup(func() { _ = gr.Close() })
dec := NewWALDecoder(gr)
msg, err := dec.Decode()
assert.NoError(t, err, "expected to decode a message")
rs, ok := msg.Msg.(tmtypes.EventDataRoundState)
assert.True(t, ok, "expected message of type EventDataRoundState")
assert.Equal(t, rs.Height, h+1, "wrong height")
}
func TestWALPeriodicSync(t *testing.T) {
walDir := t.TempDir()
walFile := filepath.Join(walDir, "wal")
wal, err := NewWAL(walFile, autofile.GroupCheckDuration(1*time.Millisecond))
require.NoError(t, err)
wal.SetFlushInterval(walTestFlushInterval)
wal.SetLogger(log.TestingLogger())
// Generate some data
err = WALGenerateNBlocks(t, wal.Group(), 5)
require.NoError(t, err)
// We should have data in the buffer now
assert.NotZero(t, wal.Group().Buffered())
require.NoError(t, wal.Start())
t.Cleanup(func() {
if err := wal.Stop(); err != nil {
t.Error(err)
}
wal.Wait()
})
time.Sleep(walTestFlushInterval + (10 * time.Millisecond))
// The data should have been flushed by the periodic sync
assert.Zero(t, wal.Group().Buffered())
h := int64(4)
gr, found, err := wal.SearchForEndHeight(h, &WALSearchOptions{})
assert.NoError(t, err, "expected not to err on height %d", h)
assert.True(t, found, "expected to find end height for %d", h)
assert.NotNil(t, gr)
if gr != nil {
gr.Close()
}
}