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// Copyright 2017 Canonical Ltd.
//
// 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 network
import (
"strconv"
"testing"
"github.com/hashicorp/raft"
"github.com/stretchr/testify/assert"
)
// Only logs for the current term are kept.
func TestPeer_UpdateLogs(t *testing.T) {
cases := []struct {
title string
initial []*raft.Log // Initial logs in peer.logs
appended []*raft.Log // Logs passed to peer.UpdateLogs()
final []*raft.Log // Logs in the peer.logs after the update
}{
{
"no initial logs, no appended logs",
[]*raft.Log{},
[]*raft.Log{},
[]*raft.Log{},
},
{
"some initial logs, no appended logs",
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
},
[]*raft.Log{},
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
},
},
{
"no initial logs, one appended log",
[]*raft.Log{},
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
},
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
},
},
{
"no initial logs, two appended logs with different terms",
[]*raft.Log{},
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
{Type: raft.LogNoop, Term: 2, Index: 2},
},
[]*raft.Log{
{Type: raft.LogNoop, Term: 2, Index: 2},
},
},
{
"one initial log with older term, one appended log with newer term",
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
},
[]*raft.Log{
{Type: raft.LogNoop, Term: 2, Index: 2},
},
[]*raft.Log{
{Type: raft.LogNoop, Term: 2, Index: 2},
},
},
{
"one initial log, two appended logs with one duplicate",
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
},
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
{Type: raft.LogCommand, Term: 1, Index: 2},
},
[]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
{Type: raft.LogCommand, Term: 1, Index: 2},
},
},
}
for i, c := range cases {
t.Run(strconv.Itoa(i), func(t *testing.T) {
peer := newPeer("0", "1")
peer.logs = c.initial
peer.UpdateLogs(c.appended)
assert.Equal(t, c.final, peer.logs)
})
}
}
// Only command logs are counted.
func TestPeer_CommandLogsCount(t *testing.T) {
peer := newPeer("0", "1")
peer.UpdateLogs([]*raft.Log{
{Type: raft.LogNoop, Term: 1, Index: 1},
{Type: raft.LogCommand, Term: 1, Index: 2},
})
assert.Equal(t, uint64(1), peer.CommandLogsCount())
}
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