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file_cache_test.go
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/*
_____ _____ _____ ____ ______ _____ ------
| | | | | | | | | | | | |
| | | | | | | | | | | | |
| --- | | | | |-----| |---- | | |-----| |----- ------
| | | | | | | | | | | | |
| ____| |_____ | ____| | ____| | |_____| _____| |_____ |_____
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
Copyright © 2020-2024 Microsoft Corporation. All rights reserved.
Author : <[email protected]>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE
*/
package file_cache
import (
"bytes"
"context"
"fmt"
"io/fs"
"math"
"math/rand"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"syscall"
"testing"
"time"
"github.com/Azure/azure-storage-fuse/v2/common"
"github.com/Azure/azure-storage-fuse/v2/common/config"
"github.com/Azure/azure-storage-fuse/v2/common/log"
"github.com/Azure/azure-storage-fuse/v2/component/loopback"
"github.com/Azure/azure-storage-fuse/v2/internal"
"github.com/Azure/azure-storage-fuse/v2/internal/handlemap"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/suite"
)
var home_dir, _ = os.UserHomeDir()
type fileCacheTestSuite struct {
suite.Suite
assert *assert.Assertions
fileCache *FileCache
loopback internal.Component
cache_path string
fake_storage_path string
}
func newLoopbackFS() internal.Component {
loopback := loopback.NewLoopbackFSComponent()
loopback.Configure(true)
return loopback
}
func newTestFileCache(next internal.Component) *FileCache {
fileCache := NewFileCacheComponent()
fileCache.SetNextComponent(next)
err := fileCache.Configure(true)
if err != nil {
panic("Unable to configure file cache.")
}
return fileCache.(*FileCache)
}
func randomString(length int) string {
r := rand.New(rand.NewSource(time.Now().UnixNano()))
b := make([]byte, length)
r.Read(b)
return fmt.Sprintf("%x", b)[:length]
}
func (suite *fileCacheTestSuite) SetupTest() {
err := log.SetDefaultLogger("silent", common.LogConfig{Level: common.ELogLevel.LOG_DEBUG()})
if err != nil {
panic("Unable to set silent logger as default.")
}
rand := randomString(8)
suite.cache_path = filepath.Join(home_dir, "file_cache"+rand)
suite.fake_storage_path = filepath.Join(home_dir, "fake_storage"+rand)
defaultConfig := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n timeout-sec: 0\n\nloopbackfs:\n path: %s", suite.cache_path, suite.fake_storage_path)
log.Debug(defaultConfig)
// Delete the temp directories created
os.RemoveAll(suite.cache_path)
os.RemoveAll(suite.fake_storage_path)
suite.setupTestHelper(defaultConfig)
}
func (suite *fileCacheTestSuite) setupTestHelper(configuration string) {
suite.assert = assert.New(suite.T())
config.ReadConfigFromReader(strings.NewReader(configuration))
suite.loopback = newLoopbackFS()
suite.fileCache = newTestFileCache(suite.loopback)
suite.loopback.Start(context.Background())
err := suite.fileCache.Start(context.Background())
if err != nil {
panic(fmt.Sprintf("Unable to start file cache [%s]", err.Error()))
}
}
func (suite *fileCacheTestSuite) cleanupTest() {
suite.loopback.Stop()
err := suite.fileCache.Stop()
if err != nil {
panic(fmt.Sprintf("Unable to stop file cache [%s]", err.Error()))
}
// Delete the temp directories created
os.RemoveAll(suite.cache_path)
os.RemoveAll(suite.fake_storage_path)
}
// Tests the default configuration of file cache
func (suite *fileCacheTestSuite) TestEmpty() {
defer suite.cleanupTest()
suite.cleanupTest() // teardown the default file cache generated
emptyConfig := fmt.Sprintf("file_cache:\n path: %s\n\n offload-io: true\n\nloopbackfs:\n path: %s", suite.cache_path, suite.fake_storage_path)
suite.setupTestHelper(emptyConfig) // setup a new file cache with a custom config (teardown will occur after the test as usual)
suite.assert.Equal(suite.fileCache.Name(), "file_cache")
suite.assert.Equal(suite.fileCache.tmpPath, suite.cache_path)
suite.assert.Equal(suite.fileCache.policy.Name(), "lru")
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxSizeMB, 0)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxEviction, defaultMaxEviction)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).highThreshold, defaultMaxThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).lowThreshold, defaultMinThreshold)
suite.assert.Equal(suite.fileCache.createEmptyFile, false)
suite.assert.Equal(suite.fileCache.allowNonEmpty, false)
suite.assert.EqualValues(suite.fileCache.cacheTimeout, 120)
suite.assert.Equal(suite.fileCache.cleanupOnStart, false)
}
// Tests configuration of file cache
func (suite *fileCacheTestSuite) TestConfig() {
defer suite.cleanupTest()
suite.cleanupTest() // teardown the default file cache generated
policy := "lru"
maxSizeMb := 1024
cacheTimeout := 60
maxDeletion := 10
highThreshold := 90
lowThreshold := 10
createEmptyFile := true
allowNonEmptyTemp := true
cleanupOnStart := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n policy: %s\n max-size-mb: %d\n timeout-sec: %d\n max-eviction: %d\n high-threshold: %d\n low-threshold: %d\n create-empty-file: %t\n allow-non-empty-temp: %t\n cleanup-on-start: %t",
suite.cache_path, policy, maxSizeMb, cacheTimeout, maxDeletion, highThreshold, lowThreshold, createEmptyFile, allowNonEmptyTemp, cleanupOnStart)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
suite.assert.Equal(suite.fileCache.Name(), "file_cache")
suite.assert.Equal(suite.fileCache.tmpPath, suite.cache_path)
suite.assert.Equal(suite.fileCache.policy.Name(), policy)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxSizeMB, maxSizeMb)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxEviction, maxDeletion)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).highThreshold, highThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).lowThreshold, lowThreshold)
suite.assert.Equal(suite.fileCache.createEmptyFile, createEmptyFile)
suite.assert.Equal(suite.fileCache.allowNonEmpty, allowNonEmptyTemp)
suite.assert.EqualValues(suite.fileCache.cacheTimeout, cacheTimeout)
suite.assert.Equal(suite.fileCache.cleanupOnStart, cleanupOnStart)
}
func (suite *fileCacheTestSuite) TestDefaultCacheSize() {
defer suite.cleanupTest()
// Setup
config := fmt.Sprintf("file_cache:\n path: %s\n", suite.cache_path)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
cmd := exec.Command("bash", "-c", fmt.Sprintf("df -B1 %s | awk 'NR==2{print $4}'", suite.cache_path))
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
suite.assert.Nil(err)
freeDisk, err := strconv.Atoi(strings.TrimSpace(out.String()))
suite.assert.Nil(err)
expected := uint64(0.8 * float64(freeDisk))
actual := suite.fileCache.maxCacheSize * MB
difference := math.Abs(float64(actual) - float64(expected))
tolerance := 0.10 * float64(math.Max(float64(actual), float64(expected)))
suite.assert.LessOrEqual(difference, tolerance, "mssg:", actual, expected)
}
func (suite *fileCacheTestSuite) TestConfigPolicyTimeout() {
defer suite.cleanupTest()
suite.cleanupTest() // teardown the default file cache generated
policy := "lru"
maxSizeMb := 1024
cacheTimeout := 60
maxDeletion := 10
highThreshold := 90
lowThreshold := 10
createEmptyFile := true
allowNonEmptyTemp := true
cleanupOnStart := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n policy: %s\n max-size-mb: %d\n timeout-sec: %d\n max-eviction: %d\n high-threshold: %d\n low-threshold: %d\n create-empty-file: %t\n allow-non-empty-temp: %t\n cleanup-on-start: %t",
suite.cache_path, policy, maxSizeMb, cacheTimeout, maxDeletion, highThreshold, lowThreshold, createEmptyFile, allowNonEmptyTemp, cleanupOnStart)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
suite.assert.Equal(suite.fileCache.Name(), "file_cache")
suite.assert.Equal(suite.fileCache.tmpPath, suite.cache_path)
suite.assert.Equal(suite.fileCache.policy.Name(), policy)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxSizeMB, maxSizeMb)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxEviction, maxDeletion)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).highThreshold, highThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).lowThreshold, lowThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).cacheTimeout, cacheTimeout)
suite.assert.Equal(suite.fileCache.createEmptyFile, createEmptyFile)
suite.assert.Equal(suite.fileCache.allowNonEmpty, allowNonEmptyTemp)
suite.assert.EqualValues(suite.fileCache.cacheTimeout, cacheTimeout)
suite.assert.Equal(suite.fileCache.cleanupOnStart, cleanupOnStart)
}
func (suite *fileCacheTestSuite) TestConfigPolicyDefaultTimeout() {
defer suite.cleanupTest()
suite.cleanupTest() // teardown the default file cache generated
policy := "lru"
maxSizeMb := 1024
cacheTimeout := defaultFileCacheTimeout
maxDeletion := 10
highThreshold := 90
lowThreshold := 10
createEmptyFile := true
allowNonEmptyTemp := true
cleanupOnStart := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n policy: %s\n max-size-mb: %d\n max-eviction: %d\n high-threshold: %d\n low-threshold: %d\n create-empty-file: %t\n allow-non-empty-temp: %t\n cleanup-on-start: %t",
suite.cache_path, policy, maxSizeMb, maxDeletion, highThreshold, lowThreshold, createEmptyFile, allowNonEmptyTemp, cleanupOnStart)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
suite.assert.Equal(suite.fileCache.Name(), "file_cache")
suite.assert.Equal(suite.fileCache.tmpPath, suite.cache_path)
suite.assert.Equal(suite.fileCache.policy.Name(), policy)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxSizeMB, maxSizeMb)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxEviction, maxDeletion)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).highThreshold, highThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).lowThreshold, lowThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).cacheTimeout, cacheTimeout)
suite.assert.Equal(suite.fileCache.createEmptyFile, createEmptyFile)
suite.assert.Equal(suite.fileCache.allowNonEmpty, allowNonEmptyTemp)
suite.assert.EqualValues(suite.fileCache.cacheTimeout, cacheTimeout)
suite.assert.Equal(suite.fileCache.cleanupOnStart, cleanupOnStart)
}
func (suite *fileCacheTestSuite) TestConfigZero() {
defer suite.cleanupTest()
suite.cleanupTest() // teardown the default file cache generated
policy := "lru"
maxSizeMb := 1024
cacheTimeout := 0
maxDeletion := 10
highThreshold := 90
lowThreshold := 10
createEmptyFile := true
allowNonEmptyTemp := true
cleanupOnStart := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n policy: %s\n max-size-mb: %d\n timeout-sec: %d\n max-eviction: %d\n high-threshold: %d\n low-threshold: %d\n create-empty-file: %t\n allow-non-empty-temp: %t\n cleanup-on-start: %t",
suite.cache_path, policy, maxSizeMb, cacheTimeout, maxDeletion, highThreshold, lowThreshold, createEmptyFile, allowNonEmptyTemp, cleanupOnStart)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
suite.assert.Equal(suite.fileCache.Name(), "file_cache")
suite.assert.Equal(suite.fileCache.tmpPath, suite.cache_path)
suite.assert.Equal(suite.fileCache.policy.Name(), policy)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxSizeMB, maxSizeMb)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).maxEviction, maxDeletion)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).highThreshold, highThreshold)
suite.assert.EqualValues(suite.fileCache.policy.(*lruPolicy).lowThreshold, lowThreshold)
suite.assert.Equal(suite.fileCache.createEmptyFile, createEmptyFile)
suite.assert.Equal(suite.fileCache.allowNonEmpty, allowNonEmptyTemp)
suite.assert.EqualValues(suite.fileCache.cacheTimeout, cacheTimeout)
suite.assert.Equal(suite.fileCache.cleanupOnStart, cleanupOnStart)
}
// Tests CreateDir
func (suite *fileCacheTestSuite) TestCreateDir() {
defer suite.cleanupTest()
path := "a"
options := internal.CreateDirOptions{Name: path}
err := suite.fileCache.CreateDir(options)
suite.assert.Nil(err)
// Path should not be added to the file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
// Path should be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
func (suite *fileCacheTestSuite) TestDeleteDir() {
defer suite.cleanupTest()
// Setup
// Configure to create empty files so we create the file in storage
createEmptyFile := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n create-empty-file: %t\n\nloopbackfs:\n path: %s",
suite.cache_path, createEmptyFile, suite.fake_storage_path)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
dir := "dir"
path := fmt.Sprintf("%s/file", dir)
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: dir, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
// The file (and directory) is in the cache and storage (see TestCreateFileInDirCreateEmptyFile)
// Delete the file since we can only delete empty directories
suite.fileCache.DeleteFile(internal.DeleteFileOptions{Name: path})
// Delete the directory
err := suite.fileCache.DeleteDir(internal.DeleteDirOptions{Name: dir})
suite.assert.Nil(err)
suite.assert.False(suite.fileCache.policy.IsCached(dir)) // Directory should not be cached
}
// TODO: Test Deleting a directory that has a file in the file cache
func (suite *fileCacheTestSuite) TestReadDirCase1() {
defer suite.cleanupTest()
// Setup
name := "dir"
subdir := filepath.Join(name, "subdir")
file1 := filepath.Join(name, "file1")
file2 := filepath.Join(name, "file2")
file3 := filepath.Join(name, "file3")
// Create files directly in "fake_storage"
suite.loopback.CreateDir(internal.CreateDirOptions{Name: name, Mode: 0777})
suite.loopback.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file1})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file2})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file3})
// Read the Directory
dir, err := suite.fileCache.ReadDir(internal.ReadDirOptions{Name: name})
suite.assert.Nil(err)
suite.assert.NotEmpty(dir)
suite.assert.EqualValues(4, len(dir))
suite.assert.EqualValues(file1, dir[0].Path)
suite.assert.EqualValues(file2, dir[1].Path)
suite.assert.EqualValues(file3, dir[2].Path)
suite.assert.EqualValues(subdir, dir[3].Path)
}
func (suite *fileCacheTestSuite) TestReadDirCase2() {
defer suite.cleanupTest()
// Setup
name := "dir"
subdir := filepath.Join(name, "subdir")
file1 := filepath.Join(name, "file1")
file2 := filepath.Join(name, "file2")
file3 := filepath.Join(name, "file3")
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: name, Mode: 0777})
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
// By default createEmptyFile is false, so we will not create these files in storage until they are closed.
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file1, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file2, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file3, Mode: 0777})
// Read the Directory
dir, err := suite.fileCache.ReadDir(internal.ReadDirOptions{Name: name})
suite.assert.Nil(err)
suite.assert.NotEmpty(dir)
suite.assert.EqualValues(4, len(dir))
suite.assert.EqualValues(subdir, dir[0].Path)
suite.assert.EqualValues(file1, dir[1].Path)
suite.assert.EqualValues(file2, dir[2].Path)
suite.assert.EqualValues(file3, dir[3].Path)
}
func (suite *fileCacheTestSuite) TestReadDirCase3() {
defer suite.cleanupTest()
// Setup
name := "dir"
subdir := filepath.Join(name, "subdir")
file1 := filepath.Join(name, "file1")
file2 := filepath.Join(name, "file2")
file3 := filepath.Join(name, "file3")
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: name, Mode: 0777})
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
// By default createEmptyFile is false, so we will not create these files in storage until they are closed.
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file1, Mode: 0777})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file1, Size: 1024})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file2, Mode: 0777})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file2, Size: 1024})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file3, Mode: 0777})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file3, Size: 1024})
// Create the files in fake_storage and simulate different sizes
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file1, Mode: 0777}) // Length is default 0
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file2, Mode: 0777})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file3, Mode: 0777})
// Read the Directory
dir, err := suite.fileCache.ReadDir(internal.ReadDirOptions{Name: name})
suite.assert.Nil(err)
suite.assert.NotEmpty(dir)
suite.assert.EqualValues(4, len(dir))
suite.assert.EqualValues(file1, dir[0].Path)
suite.assert.EqualValues(1024, dir[0].Size)
suite.assert.EqualValues(file2, dir[1].Path)
suite.assert.EqualValues(1024, dir[1].Size)
suite.assert.EqualValues(file3, dir[2].Path)
suite.assert.EqualValues(1024, dir[2].Size)
suite.assert.EqualValues(subdir, dir[3].Path)
}
func pos(s []*internal.ObjAttr, e string) int {
for i, v := range s {
if v.Path == e {
return i
}
}
return -1
}
func (suite *fileCacheTestSuite) TestReadDirMixed() {
defer suite.cleanupTest()
// Setup
name := "dir"
subdir := filepath.Join(name, "subdir")
file1 := filepath.Join(name, "file1") // case 1
file2 := filepath.Join(name, "file2") // case 2
file3 := filepath.Join(name, "file3") // case 3
file4 := filepath.Join(name, "file4") // case 4
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: name, Mode: 0777})
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
// By default createEmptyFile is false, so we will not create these files in storage until they are closed.
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file2, Mode: 0777})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file2, Size: 1024})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file3, Mode: 0777})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file3, Size: 1024})
// Create the files in fake_storage and simulate different sizes
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file1, Mode: 0777}) // Length is default 0
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file3, Mode: 0777})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file4, Mode: 0777})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file4, Size: 1024})
suite.fileCache.TruncateFile(internal.TruncateFileOptions{Name: file4, Size: 0})
// Read the Directory
dir, err := suite.fileCache.ReadDir(internal.ReadDirOptions{Name: name})
suite.assert.Nil(err)
suite.assert.NotEmpty(dir)
var i int
i = pos(dir, file1)
suite.assert.EqualValues(0, dir[i].Size)
i = pos(dir, file3)
suite.assert.EqualValues(1024, dir[i].Size)
i = pos(dir, file2)
suite.assert.EqualValues(1024, dir[i].Size)
i = pos(dir, file4)
suite.assert.EqualValues(0, dir[i].Size)
}
func (suite *fileCacheTestSuite) TestReadDirError() {
defer suite.cleanupTest()
// Setup
name := "dir" // Does not exist in cache or storage
dir, err := suite.fileCache.ReadDir(internal.ReadDirOptions{Name: name})
suite.assert.Nil(err) // This seems wrong, I feel like we should return ENOENT? But then again, see the comment in BlockBlob List.
suite.assert.Empty(dir)
}
func (suite *fileCacheTestSuite) TestStreamDirCase1() {
defer suite.cleanupTest()
// Setup
name := "dir"
subdir := filepath.Join(name, "subdir")
file1 := filepath.Join(name, "file1")
file2 := filepath.Join(name, "file2")
file3 := filepath.Join(name, "file3")
// Create files directly in "fake_storage"
suite.loopback.CreateDir(internal.CreateDirOptions{Name: name, Mode: 0777})
suite.loopback.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file1})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file2})
suite.loopback.CreateFile(internal.CreateFileOptions{Name: file3})
// Read the Directory
dir, _, err := suite.fileCache.StreamDir(internal.StreamDirOptions{Name: name})
suite.assert.Nil(err)
suite.assert.NotEmpty(dir)
suite.assert.EqualValues(4, len(dir))
suite.assert.EqualValues(file1, dir[0].Path)
suite.assert.EqualValues(file2, dir[1].Path)
suite.assert.EqualValues(file3, dir[2].Path)
suite.assert.EqualValues(subdir, dir[3].Path)
}
// TODO: case3 requires more thought due to the way loopback fs is designed, specifically getAttr and streamDir
func (suite *fileCacheTestSuite) TestStreamDirCase2() {
defer suite.cleanupTest()
// Setup
name := "dir"
subdir := filepath.Join(name, "subdir")
file1 := filepath.Join(name, "file1")
file2 := filepath.Join(name, "file2")
file3 := filepath.Join(name, "file3")
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: name, Mode: 0777})
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
// By default createEmptyFile is false, so we will not create these files in storage until they are closed.
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file1, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file2, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file3, Mode: 0777})
// Read the Directory
dir, _, err := suite.fileCache.StreamDir(internal.StreamDirOptions{Name: name})
suite.assert.Nil(err)
suite.assert.NotEmpty(dir)
suite.assert.EqualValues(4, len(dir))
suite.assert.EqualValues(subdir, dir[0].Path)
suite.assert.EqualValues(file1, dir[1].Path)
suite.assert.EqualValues(file2, dir[2].Path)
suite.assert.EqualValues(file3, dir[3].Path)
}
func (suite *fileCacheTestSuite) TestFileUsed() {
defer suite.cleanupTest()
suite.fileCache.FileUsed("temp")
suite.fileCache.policy.IsCached("temp")
}
// File cache does not have CreateDir Method implemented hence results are undefined here
func (suite *fileCacheTestSuite) TestIsDirEmpty() {
defer suite.cleanupTest()
// Setup
path := "dir"
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: path, Mode: 0777})
empty := suite.fileCache.IsDirEmpty(internal.IsDirEmptyOptions{Name: path})
suite.assert.True(empty)
}
func (suite *fileCacheTestSuite) TestIsDirEmptyFalse() {
defer suite.cleanupTest()
// Setup
path := "dir"
subdir := filepath.Join(path, "subdir")
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: path, Mode: 0777})
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: subdir, Mode: 0777})
empty := suite.fileCache.IsDirEmpty(internal.IsDirEmptyOptions{Name: path})
suite.assert.False(empty)
}
func (suite *fileCacheTestSuite) TestIsDirEmptyFalseInCache() {
defer suite.cleanupTest()
// Setup
path := "dir"
file := filepath.Join(path, "file")
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: path, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file, Mode: 0777})
empty := suite.fileCache.IsDirEmpty(internal.IsDirEmptyOptions{Name: path})
suite.assert.False(empty)
}
func (suite *fileCacheTestSuite) TestRenameDir() {
defer suite.cleanupTest()
// Setup
// Configure to create empty files so we create the file in storage
createEmptyFile := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n create-empty-file: %t\n\nloopbackfs:\n path: %s",
suite.cache_path, createEmptyFile, suite.fake_storage_path)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
src := "src"
dst := "dst"
path := fmt.Sprintf("%s/file", src)
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: src, Mode: 0777})
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
// The file (and directory) is in the cache and storage (see TestCreateFileInDirCreateEmptyFile)
// Delete the file since we can only delete empty directories
suite.fileCache.DeleteFile(internal.DeleteFileOptions{Name: path})
// Delete the directory
err := suite.fileCache.RenameDir(internal.RenameDirOptions{Src: src, Dst: dst})
suite.assert.Nil(err)
suite.assert.False(suite.fileCache.policy.IsCached(src)) // Directory should not be cached
}
func (suite *fileCacheTestSuite) TestCreateFile() {
defer suite.cleanupTest()
// Default is to not create empty files on create file to support immutable storage.
path := "file1"
options := internal.CreateFileOptions{Name: path}
f, err := suite.fileCache.CreateFile(options)
suite.assert.Nil(err)
suite.assert.True(f.Dirty()) // Handle should be dirty since it was not created in storage
// Path should be added to the file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should not be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
}
func (suite *fileCacheTestSuite) TestCreateFileWithNoPerm() {
defer suite.cleanupTest()
// Default is to not create empty files on create file to support immutable storage.
path := "file1"
options := internal.CreateFileOptions{Name: path, Mode: 0000}
f, err := suite.fileCache.CreateFile(options)
suite.assert.Nil(err)
suite.assert.True(f.Dirty()) // Handle should be dirty since it was not created in storage
// Path should be added to the file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should not be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
err = suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: f})
suite.assert.Nil(err)
info, _ := os.Stat(suite.cache_path + "/" + path)
suite.assert.Equal(info.Mode(), os.FileMode(0000))
}
func (suite *fileCacheTestSuite) TestCreateFileWithWritePerm() {
defer suite.cleanupTest()
// Default is to not create empty files on create file to support immutable storage.
path := "file1"
options := internal.CreateFileOptions{Name: path, Mode: 0222}
f, err := suite.fileCache.CreateFile(options)
suite.assert.Nil(err)
suite.assert.True(f.Dirty()) // Handle should be dirty since it was not created in storage
os.Chmod(suite.cache_path+"/"+path, 0331)
// Path should be added to the file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should not be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
err = suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: f})
suite.assert.Nil(err)
info, _ := os.Stat(suite.cache_path + "/" + path)
suite.assert.Equal(info.Mode(), fs.FileMode(0331))
}
func (suite *fileCacheTestSuite) TestCreateFileInDir() {
defer suite.cleanupTest()
// Default is to not create empty files on create file to support immutable storage.
dir := "dir"
path := fmt.Sprintf("%s/file", dir)
options := internal.CreateFileOptions{Name: path}
f, err := suite.fileCache.CreateFile(options)
suite.assert.Nil(err)
suite.assert.True(f.Dirty()) // Handle should be dirty since it was not created in storage
// Path should be added to the file cache, including directory
_, err = os.Stat(suite.cache_path + "/" + dir)
suite.assert.True(err == nil || os.IsExist(err))
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should not be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
}
func (suite *fileCacheTestSuite) TestCreateFileCreateEmptyFile() {
defer suite.cleanupTest()
// Configure to create empty files so we create the file in storage
createEmptyFile := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n create-empty-file: %t\n\nloopbackfs:\n path: %s",
suite.cache_path, createEmptyFile, suite.fake_storage_path)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
path := "file2"
options := internal.CreateFileOptions{Name: path}
f, err := suite.fileCache.CreateFile(options)
suite.assert.Nil(err)
suite.assert.False(f.Dirty()) // Handle should not be dirty since it was written to storage
// Path should be added to the file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
func (suite *fileCacheTestSuite) TestCreateFileInDirCreateEmptyFile() {
defer suite.cleanupTest()
// Configure to create empty files so we create the file in storage
createEmptyFile := true
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n create-empty-file: %t\n\nloopbackfs:\n path: %s",
suite.cache_path, createEmptyFile, suite.fake_storage_path)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
dir := "dir"
path := fmt.Sprintf("%s/file", dir)
suite.fileCache.CreateDir(internal.CreateDirOptions{Name: dir, Mode: 0777})
f, err := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
suite.assert.Nil(err)
suite.assert.False(f.Dirty()) // Handle should be dirty since it was not created in storage
// Path should be added to the file cache, including directory
_, err = os.Stat(suite.cache_path + "/" + dir)
suite.assert.True(err == nil || os.IsExist(err))
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should be in fake storage, including directory
_, err = os.Stat(suite.fake_storage_path + "/" + dir)
suite.assert.True(err == nil || os.IsExist(err))
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
func (suite *fileCacheTestSuite) TestSyncFile() {
defer suite.cleanupTest()
path := "file3"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
// On a sync we open, sync, flush and close
handle, err := suite.fileCache.OpenFile(internal.OpenFileOptions{Name: path, Mode: 0777})
suite.assert.Nil(err)
err = suite.fileCache.SyncFile(internal.SyncFileOptions{Handle: handle})
suite.assert.Nil(err)
testData := "test data"
data := []byte(testData)
suite.fileCache.WriteFile(internal.WriteFileOptions{Handle: handle, Offset: 0, Data: data})
suite.fileCache.FlushFile(internal.FlushFileOptions{Handle: handle})
suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
// Path should not be in file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
path = "file.fsync"
suite.fileCache.syncToFlush = true
handle, err = suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
suite.assert.Nil(err)
_, err = suite.fileCache.WriteFile(internal.WriteFileOptions{Handle: handle, Offset: 0, Data: data})
suite.assert.Nil(err)
suite.assert.Equal(handle.Dirty(), true)
err = suite.fileCache.SyncFile(internal.SyncFileOptions{Handle: handle})
suite.assert.Nil(err)
suite.assert.Equal(handle.Dirty(), false)
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
suite.fileCache.syncToFlush = false
}
func (suite *fileCacheTestSuite) TestDeleteFile() {
defer suite.cleanupTest()
path := "file4"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
err := suite.fileCache.DeleteFile(internal.DeleteFileOptions{Name: path})
suite.assert.Nil(err)
// Path should not be in file cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
// Path should not be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
}
// Case 2 Test cover when the file does not exist in storage but it exists in the local cache.
// This can happen if createEmptyFile is false and the file hasn't been flushed yet.
func (suite *fileCacheTestSuite) TestDeleteFileCase2() {
defer suite.cleanupTest()
// Default is to not create empty files on create file to support immutable storage.
path := "file5"
suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
err := suite.fileCache.DeleteFile(internal.DeleteFileOptions{Name: path})
suite.assert.NotNil(err)
suite.assert.Equal(err, syscall.EIO)
// Path should not be in local cache (since we failed the operation)
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// Path should not be in fake storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
}
func (suite *fileCacheTestSuite) TestDeleteFileError() {
defer suite.cleanupTest()
path := "file6"
err := suite.fileCache.DeleteFile(internal.DeleteFileOptions{Name: path})
suite.assert.NotNil(err)
suite.assert.EqualValues(syscall.ENOENT, err)
}
func (suite *fileCacheTestSuite) TestOpenFileNotInCache() {
defer suite.cleanupTest()
path := "file7"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
testData := "test data"
data := []byte(testData)
suite.fileCache.WriteFile(internal.WriteFileOptions{Handle: handle, Offset: 0, Data: data})
suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
// loop until file does not exist - done due to async nature of eviction
_, err := os.Stat(suite.cache_path + "/" + path)
for i := 0; i < 10 && !os.IsNotExist(err); i++ {
time.Sleep(time.Second)
_, err = os.Stat(suite.cache_path + "/" + path)
}
suite.assert.True(os.IsNotExist(err))
// Download is required
handle, err = suite.fileCache.OpenFile(internal.OpenFileOptions{Name: path, Mode: 0777})
suite.assert.Nil(err)
suite.assert.EqualValues(path, handle.Path)
suite.assert.False(handle.Dirty())
// File should exist in cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
func (suite *fileCacheTestSuite) TestOpenFileInCache() {
defer suite.cleanupTest()
path := "file8"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
testData := "test data"
data := []byte(testData)
suite.fileCache.WriteFile(internal.WriteFileOptions{Handle: handle, Offset: 0, Data: data})
suite.fileCache.FlushFile(internal.FlushFileOptions{Handle: handle})
// Download is required
handle, err := suite.fileCache.OpenFile(internal.OpenFileOptions{Name: path, Mode: 0777})
suite.assert.Nil(err)
suite.assert.EqualValues(path, handle.Path)
suite.assert.False(handle.Dirty())
// File should exist in cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
// Tests for GetProperties in OpenFile should be done in E2E tests
// - there is no good way to test it here with a loopback FS without a mock component.
func (suite *fileCacheTestSuite) TestCloseFile() {
defer suite.cleanupTest()
// Default is to not create empty files on create file to support immutable storage.
path := "file9"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
// The file is in the cache but not in storage (see TestCreateFileInDirCreateEmptyFile)
// CloseFile
err := suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
suite.assert.Nil(err)
// loop until file does not exist - done due to async nature of eviction
_, err = os.Stat(suite.cache_path + "/" + path)
for i := 0; i < 10 && !os.IsNotExist(err); i++ {
time.Sleep(time.Second)
_, err = os.Stat(suite.cache_path + "/" + path)
}
suite.assert.True(os.IsNotExist(err))
suite.assert.False(suite.fileCache.policy.IsCached(path)) // File should be invalidated
// File should not be in cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
// File should be in storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
func (suite *fileCacheTestSuite) TestCloseFileTimeout() {
defer suite.cleanupTest()
suite.cleanupTest() // teardown the default file cache generated
cacheTimeout := 5
config := fmt.Sprintf("file_cache:\n path: %s\n offload-io: true\n timeout-sec: %d\n\nloopbackfs:\n path: %s",
suite.cache_path, cacheTimeout, suite.fake_storage_path)
suite.setupTestHelper(config) // setup a new file cache with a custom config (teardown will occur after the test as usual)
path := "file10"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: path, Mode: 0777})
// The file is in the cache but not in storage (see TestCreateFileInDirCreateEmptyFile)
// CloseFile
err := suite.fileCache.CloseFile(internal.CloseFileOptions{Handle: handle})
suite.assert.Nil(err)
suite.assert.False(suite.fileCache.policy.IsCached(path)) // File should be invalidated
// File should be in cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// File should be in storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
// loop until file does not exist - done due to async nature of eviction
_, err = os.Stat(suite.cache_path + "/" + path)
for i := 0; i < (cacheTimeout*3) && !os.IsNotExist(err); i++ {
time.Sleep(time.Second)
_, err = os.Stat(suite.cache_path + "/" + path)
}
// File should not be in cache
_, err = os.Stat(suite.cache_path + "/" + path)
suite.assert.True(os.IsNotExist(err))
// File should be in storage
_, err = os.Stat(suite.fake_storage_path + "/" + path)
suite.assert.True(err == nil || os.IsExist(err))
}
func (suite *fileCacheTestSuite) TestReadFileEmpty() {
defer suite.cleanupTest()
// Setup
file := "file11"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file, Mode: 0777})
d, err := suite.fileCache.ReadFile(internal.ReadFileOptions{Handle: handle})
suite.assert.Nil(err)
suite.assert.Empty(d)
}
func (suite *fileCacheTestSuite) TestReadFile() {
defer suite.cleanupTest()
// Setup
file := "file12"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file, Mode: 0777})
testData := "test data"
data := []byte(testData)
suite.fileCache.WriteFile(internal.WriteFileOptions{Handle: handle, Offset: 0, Data: data})
suite.fileCache.FlushFile(internal.FlushFileOptions{Handle: handle})
handle, _ = suite.fileCache.OpenFile(internal.OpenFileOptions{Name: file, Mode: 0777})
d, err := suite.fileCache.ReadFile(internal.ReadFileOptions{Handle: handle})
suite.assert.Nil(err)
suite.assert.EqualValues(data, d)
}
func (suite *fileCacheTestSuite) TestReadFileNoFlush() {
defer suite.cleanupTest()
// Setup
file := "file13"
handle, _ := suite.fileCache.CreateFile(internal.CreateFileOptions{Name: file, Mode: 0777})
testData := "test data"
data := []byte(testData)
suite.fileCache.WriteFile(internal.WriteFileOptions{Handle: handle, Offset: 0, Data: data})
handle, _ = suite.fileCache.OpenFile(internal.OpenFileOptions{Name: file, Mode: 0777})
d, err := suite.fileCache.ReadFile(internal.ReadFileOptions{Handle: handle})
suite.assert.Nil(err)