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// Copyright 2016 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rafthttp
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
"time"
"go.etcd.io/etcd/client/pkg/v3/types"
"go.etcd.io/etcd/raft/v3/raftpb"
"go.etcd.io/etcd/server/v3/etcdserver/api/snap"
"go.uber.org/zap"
)
type strReaderCloser struct{ *strings.Reader }
func (s strReaderCloser) Close() error { return nil }
func TestSnapshotSend(t *testing.T) {
tests := []struct {
m raftpb.Message
rc io.ReadCloser
size int64
wsent bool
wfiles int
}{
// sent and receive with no errors
{
m: raftpb.Message{Type: raftpb.MsgSnap, To: 1},
rc: strReaderCloser{strings.NewReader("hello")},
size: 5,
wsent: true,
wfiles: 1,
},
// error when reading snapshot for send
{
m: raftpb.Message{Type: raftpb.MsgSnap, To: 1},
rc: &errReadCloser{fmt.Errorf("snapshot error")},
size: 1,
wsent: false,
wfiles: 0,
},
// sends less than the given snapshot length
{
m: raftpb.Message{Type: raftpb.MsgSnap, To: 1},
rc: strReaderCloser{strings.NewReader("hello")},
size: 10000,
wsent: false,
wfiles: 0,
},
// sends less than actual snapshot length
{
m: raftpb.Message{Type: raftpb.MsgSnap, To: 1},
rc: strReaderCloser{strings.NewReader("hello")},
size: 1,
wsent: false,
wfiles: 0,
},
}
for i, tt := range tests {
sent, files := testSnapshotSend(t, snap.NewMessage(tt.m, tt.rc, tt.size))
if tt.wsent != sent {
t.Errorf("#%d: snapshot expected %v, got %v", i, tt.wsent, sent)
}
if tt.wfiles != len(files) {
t.Fatalf("#%d: expected %d files, got %d files", i, tt.wfiles, len(files))
}
}
}
func testSnapshotSend(t *testing.T, sm *snap.Message) (bool, []os.FileInfo) {
d, err := ioutil.TempDir(os.TempDir(), "snapdir")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(d)
r := &fakeRaft{}
tr := &Transport{pipelineRt: &http.Transport{}, ClusterID: types.ID(1), Raft: r}
ch := make(chan struct{}, 1)
h := &syncHandler{newSnapshotHandler(tr, r, snap.New(zap.NewExample(), d), types.ID(1)), ch}
srv := httptest.NewServer(h)
defer srv.Close()
picker := mustNewURLPicker(t, []string{srv.URL})
snapsend := newSnapshotSender(tr, picker, types.ID(1), newPeerStatus(zap.NewExample(), types.ID(0), types.ID(1)))
defer snapsend.stop()
snapsend.send(*sm)
sent := false
select {
case <-time.After(time.Second):
t.Fatalf("timed out sending snapshot")
case sent = <-sm.CloseNotify():
}
// wait for handler to finish accepting snapshot
<-ch
files, rerr := ioutil.ReadDir(d)
if rerr != nil {
t.Fatal(rerr)
}
return sent, files
}
type errReadCloser struct{ err error }
func (s *errReadCloser) Read(p []byte) (int, error) { return 0, s.err }
func (s *errReadCloser) Close() error { return s.err }
type syncHandler struct {
h http.Handler
ch chan<- struct{}
}
func (sh *syncHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
sh.h.ServeHTTP(w, r)
sh.ch <- struct{}{}
}
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