rclone/backend/cache/cache_internal_test.go

// +build !plan9,go1.7

package cache_test

import (
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"math/rand"
	"path"
	"path/filepath"
	"runtime"
	"strconv"
	"testing"
	"time"

	//"os"
	"os/exec"
	//"strings"

	"github.com/ncw/rclone/backend/cache"
	"github.com/ncw/rclone/fs/config"
	"github.com/ncw/rclone/fs/object"
	//"github.com/ncw/rclone/cmd/mount"
	//_ "github.com/ncw/rclone/cmd/cmount"
	//"github.com/ncw/rclone/cmd/mountlib"
	_ "github.com/ncw/rclone/backend/drive"
	"github.com/ncw/rclone/backend/local"
	"github.com/ncw/rclone/fs"
	"github.com/ncw/rclone/fstest"
	flag "github.com/spf13/pflag"
	"github.com/stretchr/testify/require"
)

var (
	infoAge    = time.Second * 10
	chunkClean = time.Second
	okDiff     = time.Second * 9 // really big diff here but the build machines seem to be slow. need a different way for this
	workers    = 2
)

func TestInternalListRootAndInnerRemotes(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "tilrair-local", "tilrair-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	// Instantiate inner fs
	innerFolder := "inner"
	err := rootFs.Mkdir(innerFolder)
	require.NoError(t, err)
	innerFs, err := fs.NewFs("tilrair-cache:" + innerFolder)
	require.NoError(t, err)

	obj := writeObjectString(t, innerFs, "one", "content")

	listRoot, err := rootFs.List("")
	require.NoError(t, err)
	listRootInner, err := rootFs.List(innerFolder)
	require.NoError(t, err)
	listInner, err := innerFs.List("")
	require.NoError(t, err)

	require.Lenf(t, listRoot, 1, "remote %v should have 1 entry", rootFs.Root())
	require.Lenf(t, listRootInner, 1, "remote %v should have 1 entry in %v", rootFs.Root(), innerFolder)
	require.Lenf(t, listInner, 1, "remote %v should have 1 entry", innerFs.Root())

	err = obj.Remove()
	require.NoError(t, err)
}

func TestInternalObjWrapFsFound(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "tiowff-local", "tiowff-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	wrappedFs := cfs.UnWrap()
	data := "content"
	writeObjectString(t, wrappedFs, "second", data)

	listRoot, err := rootFs.List("")
	require.NoError(t, err)
	require.Lenf(t, listRoot, 1, "remote %v should have 1 entry", rootFs.Root())

	co, err := rootFs.NewObject("second")
	require.NoError(t, err)
	r, err := co.Open()
	require.NoError(t, err)
	cachedData, err := ioutil.ReadAll(r)
	require.NoError(t, err)
	err = r.Close()
	require.NoError(t, err)

	strCached := string(cachedData)
	require.Equal(t, data, strCached)

	err = co.Remove()
	require.NoError(t, err)

	listRoot, err = wrappedFs.List("")
	require.NoError(t, err)
	require.Lenf(t, listRoot, 0, "remote %v should have 0 entries: %v", wrappedFs.Root(), listRoot)
}

func TestInternalObjNotFound(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "tionf-local", "tionf-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	obj, err := rootFs.NewObject("404")
	require.Error(t, err)
	require.Nil(t, obj)
}

func TestInternalCachedWrittenContentMatches(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "ticwcm-local", "ticwcm-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()

	// create some rand test data
	testData := make([]byte, (chunkSize*4 + chunkSize/2))
	testSize, err := rand.Read(testData)
	require.Equal(t, len(testData), testSize, "data size doesn't match")
	require.NoError(t, err)

	// write the object
	o := writeObjectBytes(t, rootFs, "data.bin", testData)
	require.Equal(t, o.Size(), int64(testSize))

	// check sample of data from in-file
	sampleStart := chunkSize / 2
	sampleEnd := chunkSize
	testSample := testData[sampleStart:sampleEnd]
	checkSample := readDataFromObj(t, o, sampleStart, sampleEnd, false)
	require.Equal(t, int64(len(checkSample)), sampleEnd-sampleStart)
	require.Equal(t, checkSample, testSample)
}

func TestInternalCachedUpdatedContentMatches(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "ticucm-local", "ticucm-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	// create some rand test data
	testData1 := []byte(fstest.RandomString(100))
	testData2 := []byte(fstest.RandomString(200))

	// write the object
	o := updateObjectBytes(t, rootFs, "data.bin", testData1, testData2)
	require.Equal(t, o.Size(), int64(len(testData2)))

	// check data from in-file
	reader, err := o.Open()
	require.NoError(t, err)
	checkSample, err := ioutil.ReadAll(reader)
	_ = reader.Close()
	require.NoError(t, err)
	require.Equal(t, checkSample, testData2)
}

func TestInternalWrappedWrittenContentMatches(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "tiwwcm-local", "tiwwcm-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()

	// create some rand test data
	testData := make([]byte, (chunkSize*4 + chunkSize/2))
	testSize, err := rand.Read(testData)
	require.Equal(t, len(testData), testSize)
	require.NoError(t, err)

	// write the object
	o := writeObjectBytes(t, cfs.UnWrap(), "data.bin", testData)
	require.Equal(t, o.Size(), int64(testSize))

	o2, err := rootFs.NewObject("data.bin")
	require.NoError(t, err)
	require.Equal(t, o2.Size(), o.Size())

	// check sample of data from in-file
	sampleStart := chunkSize / 2
	sampleEnd := chunkSize
	testSample := testData[sampleStart:sampleEnd]
	checkSample := readDataFromObj(t, o2, sampleStart, sampleEnd, false)
	require.Equal(t, len(checkSample), len(testSample))

	for i := 0; i < len(checkSample); i++ {
		require.Equal(t, testSample[i], checkSample[i])
	}
}

func TestInternalLargeWrittenContentMatches(t *testing.T) {
	t.Skip("FIXME disabled because it is unreliable")
	rootFs, boltDb := newLocalCacheFs(t, "tilwcm-local", "tilwcm-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()

	// create some rand test data
	testData := make([]byte, (chunkSize*10 + chunkSize/2))
	testSize, err := rand.Read(testData)
	require.Equal(t, len(testData), testSize)
	require.NoError(t, err)

	// write the object
	o := writeObjectBytes(t, cfs.UnWrap(), "data.bin", testData)
	require.Equal(t, o.Size(), int64(testSize))

	o2, err := rootFs.NewObject("data.bin")
	require.NoError(t, err)
	require.Equal(t, o2.Size(), o.Size())

	// check data from in-file
	checkSample := readDataFromObj(t, o2, int64(0), int64(testSize), false)
	require.Equal(t, len(checkSample), len(testData))

	for i := 0; i < len(checkSample); i++ {
		require.Equal(t, testData[i], checkSample[i], "byte: %d (%d), chunk: %d", int64(i)%chunkSize, i, int64(i)/chunkSize)
	}
}

func TestInternalLargeWrittenContentMatches2(t *testing.T) {
	cryptFs, boltDb := newLocalCacheCryptFs(t, "tilwcm2-local", "tilwcm2-cache", "tilwcm2-crypt", true, nil)
	defer cleanupFs(t, cryptFs, boltDb)

	cfs, err := getCacheFs(cryptFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()
	fileSize := 87197196
	readOffset := 87195648

	// create some rand test data
	testData := make([]byte, fileSize)
	testSize, err := rand.Read(testData)
	require.Equal(t, len(testData), testSize)
	require.NoError(t, err)

	// write the object
	o := writeObjectBytes(t, cryptFs, "data.bin", testData)
	require.Equal(t, o.Size(), int64(testSize))

	o2, err := cryptFs.NewObject("data.bin")
	require.NoError(t, err)
	require.Equal(t, o2.Size(), o.Size())

	// check data from in-file
	reader, err := o2.Open(&fs.SeekOption{Offset: int64(readOffset)})
	require.NoError(t, err)
	rs, ok := reader.(io.Seeker)
	require.True(t, ok)
	checkOffset, err := rs.Seek(int64(readOffset), 0)
	require.NoError(t, err)
	require.Equal(t, checkOffset, int64(readOffset))
	checkSample, err := ioutil.ReadAll(reader)
	require.NoError(t, err)
	_ = reader.Close()

	require.Equal(t, len(checkSample), fileSize-readOffset)
	for i := 0; i < fileSize-readOffset; i++ {
		require.Equal(t, testData[readOffset+i], checkSample[i], "byte: %d (%d), chunk: %d", int64(i)%chunkSize, i, int64(i)/chunkSize)
	}
}

func TestInternalWrappedFsChangeNotSeen(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "tiwfcns-local", "tiwfcns-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()

	// create some rand test data
	co := writeObjectRandomBytes(t, rootFs, (chunkSize*4 + chunkSize/2))

	// update in the wrapped fs
	o, err := cfs.UnWrap().NewObject(co.Remote())
	require.NoError(t, err)
	err = o.SetModTime(co.ModTime().Truncate(time.Hour))
	require.NoError(t, err)

	// get a new instance from the cache
	co2, err := rootFs.NewObject(o.Remote())
	require.NoError(t, err)

	require.NotEqual(t, o.ModTime().String(), co.ModTime().String())
	require.NotEqual(t, o.ModTime().String(), co2.ModTime().String())
	require.Equal(t, co.ModTime().String(), co2.ModTime().String())
}

func TestInternalChangeSeenAfterDirCacheFlush(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "ticsadcf-local", "ticsadcf-cache", nil)
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()

	// create some rand test data
	co := writeObjectRandomBytes(t, rootFs, (chunkSize*4 + chunkSize/2))

	// update in the wrapped fs
	o, err := cfs.UnWrap().NewObject(co.Remote())
	require.NoError(t, err)
	err = o.SetModTime(co.ModTime().Add(-1 * time.Hour))
	require.NoError(t, err)

	// get a new instance from the cache
	co2, err := rootFs.NewObject(o.Remote())
	require.NoError(t, err)

	require.NotEqual(t, o.ModTime().String(), co.ModTime().String())
	require.NotEqual(t, o.ModTime().String(), co2.ModTime().String())
	require.Equal(t, co.ModTime().String(), co2.ModTime().String())

	cfs.DirCacheFlush() // flush the cache

	l, err := cfs.UnWrap().List("")
	require.NoError(t, err)
	require.Len(t, l, 1)
	o2 := l[0]

	// get a new instance from the cache
	co, err = rootFs.NewObject(o.Remote())
	require.NoError(t, err)
	require.Equal(t, o2.ModTime().String(), co.ModTime().String())
}

func TestInternalCacheWrites(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "ticw-local", "ticw-cache", map[string]string{"cache-writes": "true"})
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()

	// create some rand test data
	co := writeObjectRandomBytes(t, rootFs, (chunkSize*4 + chunkSize/2))
	expectedTs := time.Now()
	ts, err := boltDb.GetChunkTs(path.Join(rootFs.Root(), co.Remote()), 0)
	require.NoError(t, err)
	require.WithinDuration(t, expectedTs, ts, okDiff)
}

func TestInternalMaxChunkSizeRespected(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "timcsr-local", "timcsr-cache", map[string]string{"cache-workers": "1"})
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)
	chunkSize := cfs.ChunkSize()
	totalChunks := 20

	// create some rand test data
	obj := writeObjectRandomBytes(t, cfs, (int64(totalChunks-1)*chunkSize + chunkSize/2))
	o, err := rootFs.NewObject(obj.Remote())
	require.NoError(t, err)
	co, ok := o.(*cache.Object)
	require.True(t, ok)

	for i := 0; i < 4; i++ { // read first 4
		_ = readDataFromObj(t, co, chunkSize*int64(i), chunkSize*int64(i+1), false)
	}
	cfs.CleanUpCache(true)
	// the last 2 **must** be in the cache
	require.True(t, boltDb.HasChunk(co, chunkSize*2))
	require.True(t, boltDb.HasChunk(co, chunkSize*3))

	for i := 4; i < 6; i++ { // read next 2
		_ = readDataFromObj(t, co, chunkSize*int64(i), chunkSize*int64(i+1), false)
	}
	cfs.CleanUpCache(true)
	// the last 2 **must** be in the cache
	require.True(t, boltDb.HasChunk(co, chunkSize*4))
	require.True(t, boltDb.HasChunk(co, chunkSize*5))
}

func TestInternalExpiredEntriesRemoved(t *testing.T) {
	rootFs, boltDb := newLocalCacheFs(t, "tieer-local", "tieer-cache", map[string]string{"info_age": "5s"})
	defer cleanupFs(t, rootFs, boltDb)

	cfs, err := getCacheFs(rootFs)
	require.NoError(t, err)

	// create some rand test data
	_ = writeObjectString(t, cfs, "one", "one content")
	err = cfs.Mkdir("test")
	require.NoError(t, err)
	_ = writeObjectString(t, cfs, "test/second", "second content")

	l, err := cfs.List("test")
	require.NoError(t, err)
	require.Len(t, l, 1)

	err = cfs.UnWrap().Mkdir("test/test2")
	require.NoError(t, err)

	l, err = cfs.List("test")
	require.NoError(t, err)
	require.Len(t, l, 1)

	waitTime := time.Second * 5
	t.Logf("Waiting %v seconds for cache to expire\n", waitTime)
	time.Sleep(waitTime)

	l, err = cfs.List("test")
	require.NoError(t, err)
	require.Len(t, l, 2)
}

// FIXME, enable this when mount is sorted out
//func TestInternalFilesMissingInMount1904(t *testing.T) {
//	t.Skip("Not yet")
//	if runtime.GOOS == "windows" {
//		t.Skip("Not yet")
//	}
//	id := "tifm1904"
//	rootFs, _ := newLocalCacheCryptFs(t, "test-local", "test-cache", "test-crypt", false,
//		map[string]string{"chunk_size": "5M", "info_age": "1m", "chunk_total_size": "500M", "cache-writes": "true"})
//	mntPoint := path.Join("/tmp", "tifm1904-mnt")
//	testPoint := path.Join(mntPoint, id)
//	checkOutput := "1 10 100 11 12 13 14 15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 3 30 31 32 33 34 35 36 37 38 39 4 40 41 42 43 44 45 46 47 48 49 5 50 51 52 53 54 55 56 57 58 59 6 60 61 62 63 64 65 66 67 68 69 7 70 71 72 73 74 75 76 77 78 79 8 80 81 82 83 84 85 86 87 88 89 9 90 91 92 93 94 95 96 97 98 99 "
//
//	_ = os.MkdirAll(mntPoint, os.ModePerm)
//
//	list, err := rootFs.List("")
//	require.NoError(t, err)
//	found := false
//	list.ForDir(func(d fs.Directory) {
//		if strings.Contains(d.Remote(), id) {
//			found = true
//		}
//	})
//
//	if !found {
//		t.Skip("Test folder '%v' doesn't exist", id)
//	}
//
//	mountFs(t, rootFs, mntPoint)
//	defer unmountFs(t, mntPoint)
//
//	for i := 1; i <= 2; i++ {
//		out, err := exec.Command("ls", testPoint).Output()
//		require.NoError(t, err)
//		require.Equal(t, checkOutput, strings.Replace(string(out), "\n", " ", -1))
//		t.Logf("root path has all files")
//		_ = writeObjectString(t, rootFs, path.Join(id, strconv.Itoa(i), strconv.Itoa(i), "one_file"), "one content")
//
//		for j := 1; j <= 100; j++ {
//			out, err := exec.Command("ls", path.Join(testPoint, strconv.Itoa(j))).Output()
//			require.NoError(t, err)
//			require.Equal(t, checkOutput, strings.Replace(string(out), "\n", " ", -1), "'%v' doesn't match", j)
//		}
//		obj, err := rootFs.NewObject(path.Join(id, strconv.Itoa(i), strconv.Itoa(i), "one_file"))
//		require.NoError(t, err)
//		err = obj.Remove()
//		require.NoError(t, err)
//		t.Logf("folders contain all the files")
//
//		out, err = exec.Command("date").Output()
//		require.NoError(t, err)
//		t.Logf("check #%v date: '%v'", i, strings.Replace(string(out), "\n", " ", -1))
//
//		if i < 2 {
//			time.Sleep(time.Second * 60)
//		}
//	}
//}

func writeObjectRandomBytes(t *testing.T, f fs.Fs, size int64) fs.Object {
	remote := strconv.Itoa(rand.Int()) + ".bin"
	// create some rand test data
	testData := make([]byte, size)
	testSize, err := rand.Read(testData)
	require.Equal(t, size, int64(len(testData)))
	require.Equal(t, size, int64(testSize))
	require.NoError(t, err)

	o := writeObjectBytes(t, f, remote, testData)
	require.Equal(t, size, o.Size())

	return o
}

func writeObjectString(t *testing.T, f fs.Fs, remote, content string) fs.Object {
	return writeObjectBytes(t, f, remote, []byte(content))
}

func writeObjectBytes(t *testing.T, f fs.Fs, remote string, data []byte) fs.Object {
	in := bytes.NewReader(data)
	modTime := time.Now()
	objInfo := object.NewStaticObjectInfo(remote, modTime, int64(len(data)), true, nil, f)

	obj, err := f.Put(in, objInfo)
	require.NoError(t, err)

	return obj
}

func updateObjectBytes(t *testing.T, f fs.Fs, remote string, data1 []byte, data2 []byte) fs.Object {
	in1 := bytes.NewReader(data1)
	in2 := bytes.NewReader(data2)
	objInfo1 := object.NewStaticObjectInfo(remote, time.Now(), int64(len(data1)), true, nil, f)
	objInfo2 := object.NewStaticObjectInfo(remote, time.Now(), int64(len(data2)), true, nil, f)

	obj, err := f.Put(in1, objInfo1)
	require.NoError(t, err)
	obj, err = f.NewObject(remote)
	require.NoError(t, err)
	err = obj.Update(in2, objInfo2)

	return obj
}

func readDataFromObj(t *testing.T, co fs.Object, offset, end int64, useSeek bool) []byte {
	var reader io.ReadCloser
	var err error
	size := end - offset
	checkSample := make([]byte, size)

	reader, err = co.Open(&fs.SeekOption{Offset: offset})
	require.NoError(t, err)

	totalRead, err := io.ReadFull(reader, checkSample)
	require.NoError(t, err)
	_ = reader.Close()
	require.Equal(t, int64(totalRead), size, "wrong data read size from file")

	return checkSample
}

func cleanupFs(t *testing.T, f fs.Fs, b *cache.Persistent) {
	err := f.Features().Purge()
	require.NoError(t, err)
	b.Close()
}

func newLocalCacheCryptFs(t *testing.T, localRemote, cacheRemote, cryptRemote string, purge bool, cfg map[string]string) (fs.Fs, *cache.Persistent) {
	fstest.Initialise()
	dbPath := filepath.Join(config.CacheDir, "cache-backend", cacheRemote+".db")
	chunkPath := filepath.Join(config.CacheDir, "cache-backend", cacheRemote)
	boltDb, err := cache.GetPersistent(dbPath, chunkPath, &cache.Features{PurgeDb: true})
	require.NoError(t, err)

	localExists := false
	cacheExists := false
	cryptExists := false
	for _, s := range config.FileSections() {
		if s == localRemote {
			localExists = true
		}
		if s == cacheRemote {
			cacheExists = true
		}
		if s == cryptRemote {
			cryptExists = true
		}
	}

	localRemoteWrap := ""
	if !localExists {
		localRemoteWrap = localRemote + ":/var/tmp/" + localRemote
		config.FileSet(localRemote, "type", "local")
		config.FileSet(localRemote, "nounc", "true")
	}

	if !cacheExists {
		config.FileSet(cacheRemote, "type", "cache")
		config.FileSet(cacheRemote, "remote", localRemoteWrap)
	}
	if c, ok := cfg["chunk_size"]; ok {
		config.FileSet(cacheRemote, "chunk_size", c)
	} else {
		config.FileSet(cacheRemote, "chunk_size", "1m")
	}
	if c, ok := cfg["chunk_total_size"]; ok {
		config.FileSet(cacheRemote, "chunk_total_size", c)
	} else {
		config.FileSet(cacheRemote, "chunk_total_size", "2m")
	}
	if c, ok := cfg["info_age"]; ok {
		config.FileSet(cacheRemote, "info_age", c)
	} else {
		config.FileSet(cacheRemote, "info_age", infoAge.String())
	}

	if !cryptExists {
		t.Skipf("Skipping due to missing crypt remote: %v", cryptRemote)
	}

	if c, ok := cfg["cache-chunk-no-memory"]; ok {
		_ = flag.Set("cache-chunk-no-memory", c)
	} else {
		_ = flag.Set("cache-chunk-no-memory", "true")
	}
	if c, ok := cfg["cache-workers"]; ok {
		_ = flag.Set("cache-workers", c)
	} else {
		_ = flag.Set("cache-workers", strconv.Itoa(workers))
	}
	if c, ok := cfg["cache-chunk-clean-interval"]; ok {
		_ = flag.Set("cache-chunk-clean-interval", c)
	} else {
		_ = flag.Set("cache-chunk-clean-interval", chunkClean.String())
	}
	if c, ok := cfg["cache-writes"]; ok {
		_ = flag.Set("cache-writes", c)
	} else {
		_ = flag.Set("cache-writes", strconv.FormatBool(cache.DefCacheWrites))
	}

	// Instantiate root
	f, err := fs.NewFs(cryptRemote + ":")
	require.NoError(t, err)
	if purge {
		_ = f.Features().Purge()
		require.NoError(t, err)
	}
	err = f.Mkdir("")
	require.NoError(t, err)

	return f, boltDb
}

func newLocalCacheFs(t *testing.T, localRemote, cacheRemote string, cfg map[string]string) (fs.Fs, *cache.Persistent) {
	fstest.Initialise()
	dbPath := filepath.Join(config.CacheDir, "cache-backend", cacheRemote+".db")
	chunkPath := filepath.Join(config.CacheDir, "cache-backend", cacheRemote)
	boltDb, err := cache.GetPersistent(dbPath, chunkPath, &cache.Features{PurgeDb: true})
	require.NoError(t, err)

	localExists := false
	cacheExists := false
	for _, s := range config.FileSections() {
		if s == localRemote {
			localExists = true
		}
		if s == cacheRemote {
			cacheExists = true
		}
	}

	localRemoteWrap := ""
	if !localExists {
		localRemoteWrap = localRemote + ":/var/tmp/" + localRemote
		config.FileSet(localRemote, "type", "local")
		config.FileSet(localRemote, "nounc", "true")
	}

	if !cacheExists {
		config.FileSet(cacheRemote, "type", "cache")
		config.FileSet(cacheRemote, "remote", localRemoteWrap)
	}
	if c, ok := cfg["chunk_size"]; ok {
		config.FileSet(cacheRemote, "chunk_size", c)
	} else {
		config.FileSet(cacheRemote, "chunk_size", "1m")
	}
	if c, ok := cfg["chunk_total_size"]; ok {
		config.FileSet(cacheRemote, "chunk_total_size", c)
	} else {
		config.FileSet(cacheRemote, "chunk_total_size", "2m")
	}
	if c, ok := cfg["info_age"]; ok {
		config.FileSet(cacheRemote, "info_age", c)
	} else {
		config.FileSet(cacheRemote, "info_age", infoAge.String())
	}

	if c, ok := cfg["cache-chunk-no-memory"]; ok {
		_ = flag.Set("cache-chunk-no-memory", c)
	} else {
		_ = flag.Set("cache-chunk-no-memory", "true")
	}
	if c, ok := cfg["cache-workers"]; ok {
		_ = flag.Set("cache-workers", c)
	} else {
		_ = flag.Set("cache-workers", strconv.Itoa(workers))
	}
	if c, ok := cfg["cache-chunk-clean-interval"]; ok {
		_ = flag.Set("cache-chunk-clean-interval", c)
	} else {
		_ = flag.Set("cache-chunk-clean-interval", chunkClean.String())
	}
	if c, ok := cfg["cache-writes"]; ok {
		_ = flag.Set("cache-writes", c)
	} else {
		_ = flag.Set("cache-writes", strconv.FormatBool(cache.DefCacheWrites))
	}

	// Instantiate root
	f, err := fs.NewFs(cacheRemote + ":")
	require.NoError(t, err)
	_ = f.Features().Purge()
	require.NoError(t, err)
	err = f.Mkdir("")
	require.NoError(t, err)

	return f, boltDb
}

//func mountFs(t *testing.T, f fs.Fs, mntPoint string) {
//	if runtime.GOOS == "windows" {
//		t.Skip("Skipping test cause on windows")
//		return
//	}
//
//	_ = flag.Set("debug-fuse", "false")
//
//	go func() {
//		mountlib.DebugFUSE = false
//		mountlib.AllowOther = true
//		mount.Mount(f, mntPoint)
//	}()
//
//	time.Sleep(time.Second * 3)
//}

func unmountFs(t *testing.T, mntPoint string) {
	var out []byte
	var err error

	if runtime.GOOS == "windows" {
		t.Skip("Skipping test cause on windows")
		return
	} else if runtime.GOOS == "linux" {
		out, err = exec.Command("fusermount", "-u", mntPoint).Output()
	} else if runtime.GOOS == "darwin" {
		out, err = exec.Command("diskutil", "unmount", mntPoint).Output()
	}

	t.Logf("Unmount output: %v", string(out))
	require.NoError(t, err)
}

func getCacheFs(f fs.Fs) (*cache.Fs, error) {
	cfs, ok := f.(*cache.Fs)
	if ok {
		return cfs, nil
	} else {
		if f.Features().UnWrap != nil {
			cfs, ok := f.Features().UnWrap().(*cache.Fs)
			if ok {
				return cfs, nil
			}
		}
	}

	return nil, fmt.Errorf("didn't found a cache fs")
}

var (
	_ fs.Fs = (*cache.Fs)(nil)
	_ fs.Fs = (*local.Fs)(nil)
)