syncthing/test/conflict_test.go

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// Copyright (C) 2015 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
// +build integration
package integration
import (
"log"
"os"
"path/filepath"
"testing"
"time"
)
func TestConflict(t *testing.T) {
log.Println("Cleaning...")
err := removeAll("s1", "s2", "h1/index*", "h2/index*")
if err != nil {
t.Fatal(err)
}
log.Println("Generating files...")
err = generateFiles("s1", 100, 20, "../LICENSE")
if err != nil {
t.Fatal(err)
}
fd, err := os.Create("s1/testfile.txt")
if err != nil {
t.Fatal(err)
}
_, err = fd.WriteString("hello\n")
if err != nil {
t.Fatal(err)
}
err = fd.Close()
if err != nil {
t.Fatal(err)
}
expected, err := directoryContents("s1")
if err != nil {
t.Fatal(err)
}
log.Println("Starting sender...")
sender := syncthingProcess{ // id1
instance: "1",
argv: []string{"-home", "h1"},
port: 8081,
apiKey: apiKey,
}
err = sender.start()
if err != nil {
t.Fatal(err)
}
defer sender.stop()
// Wait for one scan to succeed, or up to 20 seconds... This is to let
// startup, UPnP etc complete and make sure the sender has the full index
// before they connect.
for i := 0; i < 20; i++ {
err := sender.rescan("default")
if err != nil {
time.Sleep(time.Second)
continue
}
break
}
log.Println("Starting receiver...")
receiver := syncthingProcess{ // id2
instance: "2",
argv: []string{"-home", "h2"},
port: 8082,
apiKey: apiKey,
}
err = receiver.start()
if err != nil {
sender.stop()
t.Fatal(err)
}
defer receiver.stop()
if err = coCompletion(sender, receiver); err != nil {
t.Fatal(err)
}
sender.stop()
receiver.stop()
log.Println("Verifying...")
actual, err := directoryContents("s2")
if err != nil {
t.Fatal(err)
}
err = compareDirectoryContents(actual, expected)
if err != nil {
t.Fatal(err)
}
log.Println("Introducing a conflict (simultaneous edit)...")
fd, err = os.OpenFile("s1/testfile.txt", os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
t.Fatal(err)
}
_, err = fd.WriteString("text added to s1\n")
if err != nil {
t.Fatal(err)
}
err = fd.Close()
if err != nil {
t.Fatal(err)
}
fd, err = os.OpenFile("s2/testfile.txt", os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
t.Fatal(err)
}
_, err = fd.WriteString("text added to s2\n")
if err != nil {
t.Fatal(err)
}
err = fd.Close()
if err != nil {
t.Fatal(err)
}
log.Println("Syncing...")
err = receiver.start()
err = sender.start()
if err != nil {
t.Fatal(err)
}
if err != nil {
sender.stop()
t.Fatal(err)
}
if err = coCompletion(sender, receiver); err != nil {
t.Fatal(err)
}
sender.stop()
receiver.stop()
// The conflict is expected on the s2 side due to how we calculate which
// file is the winner (based on device ID)
files, err := filepath.Glob("s2/*sync-conflict*")
if err != nil {
t.Fatal(err)
}
if len(files) != 1 {
t.Errorf("Expected 1 conflicted files instead of %d", len(files))
}
log.Println("Introducing a conflict (edit plus delete)...")
err = os.Remove("s1/testfile.txt")
if err != nil {
t.Fatal(err)
}
fd, err = os.OpenFile("s2/testfile.txt", os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
t.Fatal(err)
}
_, err = fd.WriteString("more text added to s2\n")
if err != nil {
t.Fatal(err)
}
err = fd.Close()
if err != nil {
t.Fatal(err)
}
log.Println("Syncing...")
err = receiver.start()
err = sender.start()
if err != nil {
t.Fatal(err)
}
if err != nil {
sender.stop()
t.Fatal(err)
}
if err = coCompletion(sender, receiver); err != nil {
t.Fatal(err)
}
sender.stop()
receiver.stop()
// The conflict should manifest on the s2 side again, where we should have
// moved the file to a conflict copy instead of just deleting it.
files, err = filepath.Glob("s2/*sync-conflict*")
if err != nil {
t.Fatal(err)
}
if len(files) != 2 {
t.Errorf("Expected 2 conflicted files instead of %d", len(files))
}
}
func coCompletion(p ...syncthingProcess) error {
mainLoop:
for {
time.Sleep(2500 * time.Millisecond)
tot := 0
for i := range p {
comp, err := p[i].peerCompletion()
if err != nil {
if isTimeout(err) {
continue mainLoop
}
return err
}
for _, pct := range comp {
tot += pct
}
}
if tot == 100*(len(p)) {
return nil
}
log.Printf("%d / %d...", tot, 100*(len(p)))
}
}