142 lines
4.2 KiB
Go
142 lines
4.2 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package raft
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import (
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"testing"
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pb "go.etcd.io/etcd/v3/raft/raftpb"
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)
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var (
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testingSnap = pb.Snapshot{
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Metadata: pb.SnapshotMetadata{
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Index: 11, // magic number
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Term: 11, // magic number
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ConfState: pb.ConfState{Voters: []uint64{1, 2}},
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},
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}
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)
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func TestSendingSnapshotSetPendingSnapshot(t *testing.T) {
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storage := NewMemoryStorage()
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sm := newTestRaft(1, []uint64{1}, 10, 1, storage)
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sm.restore(testingSnap)
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sm.becomeCandidate()
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sm.becomeLeader()
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// force set the next of node 2, so that
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// node 2 needs a snapshot
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sm.prs.Progress[2].Next = sm.raftLog.firstIndex()
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sm.Step(pb.Message{From: 2, To: 1, Type: pb.MsgAppResp, Index: sm.prs.Progress[2].Next - 1, Reject: true})
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if sm.prs.Progress[2].PendingSnapshot != 11 {
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t.Fatalf("PendingSnapshot = %d, want 11", sm.prs.Progress[2].PendingSnapshot)
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}
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}
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func TestPendingSnapshotPauseReplication(t *testing.T) {
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storage := NewMemoryStorage()
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sm := newTestRaft(1, []uint64{1, 2}, 10, 1, storage)
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sm.restore(testingSnap)
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sm.becomeCandidate()
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sm.becomeLeader()
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sm.prs.Progress[2].BecomeSnapshot(11)
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sm.Step(pb.Message{From: 1, To: 1, Type: pb.MsgProp, Entries: []pb.Entry{{Data: []byte("somedata")}}})
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msgs := sm.readMessages()
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if len(msgs) != 0 {
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t.Fatalf("len(msgs) = %d, want 0", len(msgs))
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}
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}
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func TestSnapshotFailure(t *testing.T) {
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storage := NewMemoryStorage()
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sm := newTestRaft(1, []uint64{1, 2}, 10, 1, storage)
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sm.restore(testingSnap)
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sm.becomeCandidate()
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sm.becomeLeader()
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sm.prs.Progress[2].Next = 1
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sm.prs.Progress[2].BecomeSnapshot(11)
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sm.Step(pb.Message{From: 2, To: 1, Type: pb.MsgSnapStatus, Reject: true})
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if sm.prs.Progress[2].PendingSnapshot != 0 {
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t.Fatalf("PendingSnapshot = %d, want 0", sm.prs.Progress[2].PendingSnapshot)
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}
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if sm.prs.Progress[2].Next != 1 {
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t.Fatalf("Next = %d, want 1", sm.prs.Progress[2].Next)
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}
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if !sm.prs.Progress[2].ProbeSent {
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t.Errorf("ProbeSent = %v, want true", sm.prs.Progress[2].ProbeSent)
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}
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}
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func TestSnapshotSucceed(t *testing.T) {
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storage := NewMemoryStorage()
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sm := newTestRaft(1, []uint64{1, 2}, 10, 1, storage)
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sm.restore(testingSnap)
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sm.becomeCandidate()
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sm.becomeLeader()
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sm.prs.Progress[2].Next = 1
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sm.prs.Progress[2].BecomeSnapshot(11)
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sm.Step(pb.Message{From: 2, To: 1, Type: pb.MsgSnapStatus, Reject: false})
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if sm.prs.Progress[2].PendingSnapshot != 0 {
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t.Fatalf("PendingSnapshot = %d, want 0", sm.prs.Progress[2].PendingSnapshot)
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}
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if sm.prs.Progress[2].Next != 12 {
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t.Fatalf("Next = %d, want 12", sm.prs.Progress[2].Next)
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}
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if !sm.prs.Progress[2].ProbeSent {
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t.Errorf("ProbeSent = %v, want true", sm.prs.Progress[2].ProbeSent)
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}
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}
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func TestSnapshotAbort(t *testing.T) {
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storage := NewMemoryStorage()
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sm := newTestRaft(1, []uint64{1, 2}, 10, 1, storage)
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sm.restore(testingSnap)
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sm.becomeCandidate()
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sm.becomeLeader()
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sm.prs.Progress[2].Next = 1
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sm.prs.Progress[2].BecomeSnapshot(11)
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// A successful msgAppResp that has a higher/equal index than the
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// pending snapshot should abort the pending snapshot.
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sm.Step(pb.Message{From: 2, To: 1, Type: pb.MsgAppResp, Index: 11})
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if sm.prs.Progress[2].PendingSnapshot != 0 {
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t.Fatalf("PendingSnapshot = %d, want 0", sm.prs.Progress[2].PendingSnapshot)
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}
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// The follower entered StateReplicate and the leader send an append
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// and optimistically updated the progress (so we see 13 instead of 12).
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// There is something to append because the leader appended an empty entry
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// to the log at index 12 when it assumed leadership.
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if sm.prs.Progress[2].Next != 13 {
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t.Fatalf("Next = %d, want 13", sm.prs.Progress[2].Next)
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}
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if n := sm.prs.Progress[2].Inflights.Count(); n != 1 {
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t.Fatalf("expected an inflight message, got %d", n)
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}
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}
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