func benchmarkLogEntryDecoderDecode(b *testing.B, sz int) {
var buf bytes.Buffer
enc := raft.NewLogEntryEncoder(&buf)
dec := raft.NewLogEntryDecoder(&buf)
// Encode a single record and record its size.
enc.Encode(&raft.LogEntry{Data: make([]byte, sz)})
b.SetBytes(int64(buf.Len()))
// Encode all the records on the buffer first.
buf.Reset()
for i := 0; i < b.N; i++ {
if err := enc.Encode(&raft.LogEntry{Data: make([]byte, sz)}); err != nil {
b.Fatalf("encode: %s", err)
}
}
b.ReportAllocs()
// Decode from the buffer.
b.ResetTimer()
for i := 0; i < b.N; i++ {
var entry raft.LogEntry
if err := dec.Decode(&entry); err != nil {
b.Fatal(err)
}
}
b.StopTimer()
runtime.GC()
}
// Ensure the decoder returns EOF when no more data is available.
func TestLogEntryDecoder_Decode_EOF(t *testing.T) {
var e raft.LogEntry
dec := raft.NewLogEntryDecoder(bytes.NewReader([]byte{}))
if err := dec.Decode(&e); err != io.EOF {
t.Fatalf("unexpected error: %s", err)
}
}
// Ensure the decoder returns an unexpected EOF when reading partial entries.
func TestLogEntryDecoder_Decode_ErrUnexpectedEOF_Type(t *testing.T) {
for i, tt := range []struct {
buf []byte
}{
{[]byte{0x10}}, // type flag only
{[]byte{0x10, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0}}, // partial header
{[]byte{0x10, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0}}, // full header, no data
{[]byte{0x10, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 3, 4, 5}}, // full header, partial data
} {
var e raft.LogEntry
dec := raft.NewLogEntryDecoder(bytes.NewReader(tt.buf))
if err := dec.Decode(&e); err != io.ErrUnexpectedEOF {
t.Errorf("%d. unexpected error: %s", i, err)
}
}
}
// Ensure that log entries can be decoded from a reader.
func TestLogEntryDecoder_Decode(t *testing.T) {
buf := bytes.NewBuffer([]byte{0x10, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 3, 4, 5, 6})
// Create a blank entry and an expected result.
entry := &raft.LogEntry{}
// Decode the entry from the buffer.
dec := raft.NewLogEntryDecoder(buf)
if err := dec.Decode(entry); err != nil {
t.Fatalf("unexpected error: %s", err)
}
if index := uint64(2); index != entry.Index {
t.Fatalf("index: exp: %v, got: %v", index, entry.Index)
}
if term := uint64(3); term != entry.Term {
t.Fatalf("term: exp: %v, got: %v", term, entry.Term)
}
if data := []byte{4, 5, 6}; !bytes.Equal(data, entry.Data) {
t.Fatalf("data: exp: %x, got: %x", data, entry.Term)
}
}
// Ensure that random entries can be encoded and decoded correctly.
func TestLogEntryEncodeDecode(t *testing.T) {
f := func(entries []raft.LogEntry) bool {
var buf bytes.Buffer
enc := raft.NewLogEntryEncoder(&buf)
dec := raft.NewLogEntryDecoder(&buf)
// Encode entries.
for _, e := range entries {
if e.Type == 0xFF {
buf.WriteByte(0xFF)
continue
}
if err := enc.Encode(&e); err != nil {
t.Fatalf("encode: %s", err)
}
}
// Decode entries.
for _, e := range entries {
var entry raft.LogEntry
if err := dec.Decode(&entry); err != nil {
t.Fatalf("decode: %s", err)
} else if entry.Type == 0xFF {
if !reflect.DeepEqual(&entry, &raft.LogEntry{Type: 0xFF}) {
t.Fatalf("invalid snapshot entry: %#v", &entry)
}
} else if !reflect.DeepEqual(e, entry) {
t.Fatalf("mismatch:\n\nexp: %#v\n\ngot: %#v\n\n", e, entry)
}
}
return true
}
if err := quick.Check(f, nil); err != nil {
t.Error(err)
}
}
// Ensure a stream can be retrieved over HTTP.
func TestHTTPHandler_HandleStream(t *testing.T) {
n := NewInitNode()
defer n.Close()
// Connect to stream.
resp, err := http.Get(n.Server.URL + "/stream?id=1&term=1")
if err != nil {
t.Fatalf("unexpected error: %s", err)
} else if resp.StatusCode != http.StatusOK {
t.Fatalf("unexpected status: %d", resp.StatusCode)
}
defer resp.Body.Close()
// Ensure the stream is connected before applying a command.
time.Sleep(10 * time.Millisecond)
// Add an entry.
if _, err := n.Log.Apply([]byte("xyz")); err != nil {
t.Fatal(err)
}
// Move log's clock ahead & flush data.
n.Log.Clock.Add(n.Log.HeartbeatInterval)
n.Log.Flush()
// Read entries from stream.
var e raft.LogEntry
dec := raft.NewLogEntryDecoder(resp.Body)
// First entry should be the configuration.
if err := dec.Decode(&e); err != nil {
t.Fatalf("unexpected error: %s", err)
} else if e.Type != 0xFE {
t.Fatalf("expected configuration type: %d", e.Type)
}
// Next entry should be the snapshot.
if err := dec.Decode(&e); err != nil {
t.Fatalf("unexpected error: %s", err)
} else if !reflect.DeepEqual(&e, &raft.LogEntry{Type: 0xFF, Data: nil}) {
t.Fatalf("expected snapshot type: %d", e.Type)
}
// Read off the snapshot.
var fsm FSM
if err := fsm.Restore(resp.Body); err != nil {
t.Fatalf("restore: %s", err)
}
// Read off the snapshot index.
var index uint64
if err := binary.Read(resp.Body, binary.BigEndian, &index); err != nil {
t.Fatalf("read snapshot index: %s", err)
} else if index != 1 {
t.Fatalf("unexpected snapshot index: %d", index)
}
// Next entry should be the command.
if err := dec.Decode(&e); err != nil {
t.Fatalf("unexpected error: %s", err)
} else if !reflect.DeepEqual(&e, &raft.LogEntry{Index: 2, Term: 1, Data: []byte("xyz")}) {
t.Fatalf("unexpected entry: %#v", &e)
}
}