syncthing/test/sync_test.go

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// Copyright (C) 2014 The Syncthing Authors.
//
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// 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/.
//go:build integration
// +build integration
package integration
import (
"fmt"
"log"
"math/rand"
"os"
"testing"
"time"
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"github.com/syncthing/syncthing/lib/rc"
)
const (
longTimeLimit = 1 * time.Minute
shortTimeLimit = 25 * time.Second
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s12Folder = `¯\_(ツ)_/¯ Räksmörgås 动作 Адрес` // This was renamed to ensure arbitrary folder IDs are fine.
)
func TestSyncCluster(t *testing.T) {
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// This tests syncing files back and forth between three cluster members.
// Their configs are in h1, h2 and h3. The folder "default" is shared
// between all and stored in s1, s2 and s3 respectively.
//
// Another folder is shared between 1 and 2 only, in s12-1 and s12-2. A
// third folders is shared between 2 and 3, in s23-2 and s23-3.
// When -short is passed, keep it more reasonable.
timeLimit := longTimeLimit
if testing.Short() {
timeLimit = shortTimeLimit
}
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const (
numFiles = 100
fileSizeExp = 20
)
rand.Seed(42)
log.Printf("Testing with numFiles=%d, fileSizeExp=%d, timeLimit=%v", numFiles, fileSizeExp, timeLimit)
log.Println("Cleaning...")
err := removeAll("s1", "s12-1",
"s2", "s12-2", "s23-2",
"s3", "s23-3",
"h1/index*", "h2/index*", "h3/index*")
if err != nil {
t.Fatal(err)
}
// Create initial folder contents. All three devices have stuff in
// "default", which should be merged. The other two folders are initially
// empty on one side.
log.Println("Generating files...")
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err = generateFiles("s1", numFiles, fileSizeExp, "../LICENSE")
if err != nil {
t.Fatal(err)
}
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err = generateFiles("s12-1", numFiles, fileSizeExp, "../LICENSE")
if err != nil {
t.Fatal(err)
}
// We'll use this file for appending data without modifying the time stamp.
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fd, err := os.Create("s1/test-appendfile")
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)
}
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err = generateFiles("s2", numFiles, fileSizeExp, "../LICENSE")
if err != nil {
t.Fatal(err)
}
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err = generateFiles("s23-2", numFiles, fileSizeExp, "../LICENSE")
if err != nil {
t.Fatal(err)
}
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err = generateFiles("s3", numFiles, fileSizeExp, "../LICENSE")
if err != nil {
t.Fatal(err)
}
// Prepare the expected state of folders after the sync
c1, err := directoryContents("s1")
if err != nil {
t.Fatal(err)
}
c2, err := directoryContents("s2")
if err != nil {
t.Fatal(err)
}
c3, err := directoryContents("s3")
if err != nil {
t.Fatal(err)
}
e1 := mergeDirectoryContents(c1, c2, c3)
e2, err := directoryContents("s12-1")
if err != nil {
t.Fatal(err)
}
e3, err := directoryContents("s23-2")
if err != nil {
t.Fatal(err)
}
expected := [][]fileInfo{e1, e2, e3}
// Start the syncers
log.Println("Starting Syncthing...")
p0 := startInstance(t, 1)
defer checkedStop(t, p0)
p1 := startInstance(t, 2)
defer checkedStop(t, p1)
p2 := startInstance(t, 3)
defer checkedStop(t, p2)
p0.ResumeAll()
p1.ResumeAll()
p2.ResumeAll()
p := []*rc.Process{p0, p1, p2}
start := time.Now()
iteration := 0
for time.Since(start) < timeLimit {
iteration++
log.Println("Iteration", iteration)
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log.Println("Forcing rescan...")
// Force rescan of folders
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for i, device := range p {
if err := device.RescanDelay("default", 86400); err != nil {
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t.Fatal(err)
}
if i == 0 || i == 1 {
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if err := device.RescanDelay(s12Folder, 86400); err != nil {
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t.Fatal(err)
}
}
if i == 1 || i == 2 {
if err := device.RescanDelay("s23", 86400); err != nil {
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t.Fatal(err)
}
}
}
// Sync stuff and verify it looks right
err = scSyncAndCompare(p, expected)
if err != nil {
t.Error(err)
break
}
// Sleep for a little over a second to ensure that this round of
// alterations ends up in a different second than the previous one,
// even if the sync was quick. This is to give Syncthing a visible
// mtime change even on filesystem with whole second resolution.
time.Sleep(1100 * time.Millisecond)
log.Println("Altering...")
// Alter the source files for another round
err = alterFiles("s1")
if err != nil {
t.Error(err)
break
}
err = alterFiles("s12-1")
if err != nil {
t.Error(err)
break
}
err = alterFiles("s23-2")
if err != nil {
t.Error(err)
break
}
// Alter the "test-appendfile" without changing its modification time. Sneaky!
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fi, err := os.Stat("s1/test-appendfile")
if err != nil {
t.Fatal(err)
}
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fd, err := os.OpenFile("s1/test-appendfile", os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
t.Fatal(err)
}
_, err = fd.Seek(0, os.SEEK_END)
if err != nil {
t.Fatal(err)
}
_, err = fd.WriteString("more data\n")
if err != nil {
t.Fatal(err)
}
err = fd.Close()
if err != nil {
t.Fatal(err)
}
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err = os.Chtimes("s1/test-appendfile", fi.ModTime(), fi.ModTime())
if err != nil {
t.Fatal(err)
}
// Prepare the expected state of folders after the sync
e1, err = directoryContents("s1")
if err != nil {
t.Fatal(err)
}
e2, err = directoryContents("s12-1")
if err != nil {
t.Fatal(err)
}
e3, err = directoryContents("s23-2")
if err != nil {
t.Fatal(err)
}
expected = [][]fileInfo{e1, e2, e3}
}
}
func scSyncAndCompare(p []*rc.Process, expected [][]fileInfo) error {
log.Println("Syncing...")
for {
time.Sleep(250 * time.Millisecond)
if !rc.InSync("default", p...) {
continue
}
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if !rc.InSync(s12Folder, p[0], p[1]) {
continue
}
if !rc.InSync("s23", p[1], p[2]) {
continue
}
break
}
log.Println("Checking...")
for _, dir := range []string{"s1", "s2", "s3"} {
actual, err := directoryContents(dir)
if err != nil {
return err
}
if err := compareDirectoryContents(actual, expected[0]); err != nil {
return fmt.Errorf("%s: %w", dir, err)
}
}
if len(expected) > 1 {
for _, dir := range []string{"s12-1", "s12-2"} {
actual, err := directoryContents(dir)
if err != nil {
return err
}
if err := compareDirectoryContents(actual, expected[1]); err != nil {
return fmt.Errorf("%s: %w", dir, err)
}
}
}
if len(expected) > 2 {
for _, dir := range []string{"s23-2", "s23-3"} {
actual, err := directoryContents(dir)
if err != nil {
return err
}
if err := compareDirectoryContents(actual, expected[2]); err != nil {
return fmt.Errorf("%s: %w", dir, err)
}
}
}
if err := checkRemoteInSync("default", p[0], p[1]); err != nil {
return err
}
if err := checkRemoteInSync("default", p[0], p[2]); err != nil {
return err
}
if err := checkRemoteInSync(s12Folder, p[0], p[1]); err != nil {
return err
}
if err := checkRemoteInSync("s23", p[1], p[2]); err != nil {
return err
}
return nil
}
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func TestSyncSparseFile(t *testing.T) {
// This test verifies that when syncing a file that consists mostly of
// zeroes, those blocks are not transferred. It doesn't verify whether
// the resulting file is actually *sparse* or not.
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log.Println("Cleaning...")
err := removeAll("s1", "s12-1",
"s2", "s12-2", "s23-2",
"s3", "s23-3",
"h1/index*", "h2/index*", "h3/index*")
if err != nil {
t.Fatal(err)
}
log.Println("Generating files...")
if err := os.Mkdir("s1", 0755); err != nil {
t.Fatal(err)
}
fd, err := os.Create("s1/testfile")
if err != nil {
t.Fatal(err)
}
if _, err := fd.Write([]byte("Start")); err != nil {
t.Fatal(err)
}
kib := make([]byte, 1024)
for i := 0; i < 8192; i++ {
if _, err := fd.Write(kib); err != nil {
t.Fatal(err)
}
}
if _, err := fd.Write([]byte("End")); err != nil {
t.Fatal(err)
}
fd.Close()
// Start the syncers
log.Println("Syncing...")
p0 := startInstance(t, 1)
defer checkedStop(t, p0)
p1 := startInstance(t, 2)
defer checkedStop(t, p1)
p0.ResumeAll()
p1.ResumeAll()
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rc.AwaitSync("default", p0, p1)
log.Println("Comparing...")
if err := compareDirectories("s1", "s2"); err != nil {
t.Fatal(err)
}
conns, err := p0.Connections()
if err != nil {
t.Fatal(err)
}
tot := conns["total"]
if tot.OutBytesTotal > 256<<10 {
t.Fatal("Sending side has sent", tot.OutBytesTotal, "bytes, which is too much")
}
}