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 https://mozilla.org/MPL/2.0/.
// +build integration
package integration
import (
"bytes"
"io/ioutil"
"log"
"os"
"testing"
"time"
2015-04-27 23:09:44 +00:00
2015-08-06 09:29:25 +00:00
"github.com/syncthing/syncthing/lib/osutil"
"github.com/syncthing/syncthing/lib/rc"
)
func TestConflictsDefault(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)
}
sender := startInstance(t, 1)
defer checkedStop(t, sender)
receiver := startInstance(t, 2)
defer checkedStop(t, receiver)
// Rescan with a delay on the next one, so we are not surprised by a
// sudden rescan while we're trying to introduce conflicts.
if err := sender.RescanDelay("default", 86400); err != nil {
t.Fatal(err)
}
if err := receiver.RescanDelay("default", 86400); err != nil {
t.Fatal(err)
}
rc.AwaitSync("default", sender, receiver)
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)...")
if err := sender.PauseDevice(receiver.ID()); err != nil {
t.Fatal(err)
}
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)
}
if err := sender.ResumeDevice(receiver.ID()); err != nil {
t.Fatal(err)
}
log.Println("Syncing...")
if err := sender.RescanDelay("default", 86400); err != nil {
t.Fatal(err)
}
if err := receiver.RescanDelay("default", 86400); err != nil {
t.Fatal(err)
}
rc.AwaitSync("default", sender, receiver)
// The conflict is expected on the s2 side due to how we calculate which
// file is the winner (based on device ID)
files, err := osutil.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)...")
if err := sender.PauseDevice(receiver.ID()); err != nil {
t.Fatal(err)
}
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)
}
if err := sender.ResumeDevice(receiver.ID()); err != nil {
t.Fatal(err)
}
log.Println("Syncing...")
if err := sender.RescanDelay("default", 86400); err != nil {
t.Fatal(err)
}
if err := receiver.RescanDelay("default", 86400); err != nil {
t.Fatal(err)
}
rc.AwaitSync("default", sender, receiver)
// The conflict is resolved to the advantage of the edit over the delete.
// As such, we get the edited content synced back to s1 where it was
// removed.
files, err = osutil.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))
}
bs, err := ioutil.ReadFile("s1/testfile.txt")
if err != nil {
t.Error("reading file:", err)
}
if !bytes.Contains(bs, []byte("more text added to s2")) {
t.Error("s1/testfile.txt should contain data added in s2")
}
}
func TestConflictsInitialMerge(t *testing.T) {
log.Println("Cleaning...")
err := removeAll("s1", "s2", "h1/index*", "h2/index*")
if err != nil {
t.Fatal(err)
}
err = os.Mkdir("s1", 0755)
if err != nil {
t.Fatal(err)
}
err = os.Mkdir("s2", 0755)
if err != nil {
t.Fatal(err)
}
// File 1 is a conflict
err = ioutil.WriteFile("s1/file1", []byte("hello\n"), 0644)
if err != nil {
t.Fatal(err)
}
err = ioutil.WriteFile("s2/file1", []byte("goodbye\n"), 0644)
if err != nil {
t.Fatal(err)
}
// File 2 exists on s1 only
err = ioutil.WriteFile("s1/file2", []byte("hello\n"), 0644)
if err != nil {
t.Fatal(err)
}
// File 3 exists on s2 only
err = ioutil.WriteFile("s2/file3", []byte("goodbye\n"), 0644)
if err != nil {
t.Fatal(err)
}
// Let them sync
sender := startInstance(t, 1)
defer checkedStop(t, sender)
receiver := startInstance(t, 2)
defer checkedStop(t, receiver)
log.Println("Syncing...")
rc.AwaitSync("default", sender, receiver)
checkedStop(t, sender)
checkedStop(t, receiver)
log.Println("Verifying...")
// s1 should have three-four files (there's a conflict from s2 which may or may not have synced yet)
files, err := osutil.Glob("s1/file*")
if err != nil {
t.Fatal(err)
}
if len(files) < 3 || len(files) > 4 {
t.Errorf("Expected 3-4 files in s1 instead of %d", len(files))
}
// s2 should have four files (there's a conflict)
files, err = osutil.Glob("s2/file*")
if err != nil {
t.Fatal(err)
}
if len(files) != 4 {
t.Errorf("Expected 4 files in s2 instead of %d", len(files))
}
// file1 is in conflict, so there's two versions of that one
files, err = osutil.Glob("s2/file1*")
if err != nil {
t.Fatal(err)
}
if len(files) != 2 {
t.Errorf("Expected 2 'file1' files in s2 instead of %d", len(files))
}
}
func TestConflictsIndexReset(t *testing.T) {
log.Println("Cleaning...")
err := removeAll("s1", "s2", "h1/index*", "h2/index*")
if err != nil {
t.Fatal(err)
}
err = os.Mkdir("s1", 0755)
if err != nil {
t.Fatal(err)
}
err = os.Mkdir("s2", 0755)
if err != nil {
t.Fatal(err)
}
// Three files on s1
err = ioutil.WriteFile("s1/file1", []byte("hello\n"), 0644)
if err != nil {
t.Fatal(err)
}
err = ioutil.WriteFile("s1/file2", []byte("hello\n"), 0644)
if err != nil {
t.Fatal(err)
}
err = ioutil.WriteFile("s2/file3", []byte("hello\n"), 0644)
if err != nil {
t.Fatal(err)
}
// Let them sync
sender := startInstance(t, 1)
defer checkedStop(t, sender)
receiver := startInstance(t, 2)
defer checkedStop(t, receiver)
log.Println("Syncing...")
rc.AwaitSync("default", sender, receiver)
log.Println("Verifying...")
// s1 should have three files
files, err := osutil.Glob("s1/file*")
if err != nil {
t.Fatal(err)
}
if len(files) != 3 {
t.Errorf("Expected 3 files in s1 instead of %d", len(files))
}
// s2 should have three
files, err = osutil.Glob("s2/file*")
if err != nil {
t.Fatal(err)
}
if len(files) != 3 {
t.Errorf("Expected 3 files in s2 instead of %d", len(files))
}
log.Println("Updating...")
// change s2/file2 a few times, so that it's version counter increases.
// This will make the file on the cluster look newer than what we have
// locally after we rest the index, unless we have a fix for that.
for i := 0; i < 5; i++ {
err = ioutil.WriteFile("s2/file2", []byte("hello1\n"), 0644)
if err != nil {
t.Fatal(err)
}
err = receiver.Rescan("default")
if err != nil {
t.Fatal(err)
}
time.Sleep(time.Second)
}
rc.AwaitSync("default", sender, receiver)
// Now nuke the index
log.Println("Resetting...")
checkedStop(t, receiver)
removeAll("h2/index*")
// s1/file1 (remote) changes while receiver is down
err = ioutil.WriteFile("s1/file1", []byte("goodbye\n"), 0644)
if err != nil {
t.Fatal(err)
}
// s1 must know about it
err = sender.Rescan("default")
if err != nil {
t.Fatal(err)
}
// s2/file2 (local) changes while receiver is down
err = ioutil.WriteFile("s2/file2", []byte("goodbye\n"), 0644)
if err != nil {
t.Fatal(err)
}
receiver = startInstance(t, 2)
defer checkedStop(t, receiver)
log.Println("Syncing...")
rc.AwaitSync("default", sender, receiver)
// s2 should have five files (three plus two conflicts)
files, err = osutil.Glob("s2/file*")
if err != nil {
t.Fatal(err)
}
if len(files) != 5 {
t.Errorf("Expected 5 files in s2 instead of %d", len(files))
}
// file1 is in conflict, so there's two versions of that one
files, err = osutil.Glob("s2/file1*")
if err != nil {
t.Fatal(err)
}
if len(files) != 2 {
t.Errorf("Expected 2 'file1' files in s2 instead of %d", len(files))
}
// file2 is in conflict, so there's two versions of that one
files, err = osutil.Glob("s2/file2*")
if err != nil {
t.Fatal(err)
}
if len(files) != 2 {
t.Errorf("Expected 2 'file2' files in s2 instead of %d", len(files))
}
}