rclone/vfs/file_test.go

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package vfs
import (
"context"
"fmt"
"io/ioutil"
"os"
"testing"
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/fs/operations"
"github.com/rclone/rclone/fstest"
"github.com/rclone/rclone/fstest/mockfs"
"github.com/rclone/rclone/fstest/mockobject"
"github.com/rclone/rclone/vfs/vfscommon"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func fileCreate(t *testing.T, mode vfscommon.CacheMode) (r *fstest.Run, vfs *VFS, fh *File, item fstest.Item, cleanup func()) {
opt := vfscommon.DefaultOpt
opt.CacheMode = mode
opt.WriteBack = writeBackDelay
r, vfs, cleanup = newTestVFSOpt(t, &opt)
file1 := r.WriteObject(context.Background(), "dir/file1", "file1 contents", t1)
fstest.CheckItems(t, r.Fremote, file1)
node, err := vfs.Stat("dir/file1")
require.NoError(t, err)
require.True(t, node.Mode().IsRegular())
return r, vfs, node.(*File), file1, cleanup
}
func TestFileMethods(t *testing.T) {
r, vfs, file, _, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
// String
assert.Equal(t, "dir/file1", file.String())
assert.Equal(t, "<nil *File>", (*File)(nil).String())
// IsDir
assert.Equal(t, false, file.IsDir())
// IsFile
assert.Equal(t, true, file.IsFile())
// Mode
assert.Equal(t, vfs.Opt.FilePerms, file.Mode())
// Name
assert.Equal(t, "file1", file.Name())
// Path
assert.Equal(t, "dir/file1", file.Path())
// Sys
assert.Equal(t, nil, file.Sys())
// SetSys
file.SetSys(42)
assert.Equal(t, 42, file.Sys())
// Inode
assert.NotEqual(t, uint64(0), file.Inode())
// Node
assert.Equal(t, file, file.Node())
// ModTime
assert.WithinDuration(t, t1, file.ModTime(), r.Fremote.Precision())
// Size
assert.Equal(t, int64(14), file.Size())
// Sync
assert.NoError(t, file.Sync())
// DirEntry
assert.Equal(t, file.o, file.DirEntry())
// Dir
assert.Equal(t, file.d, file.Dir())
// VFS
assert.Equal(t, vfs, file.VFS())
}
func TestFileSetModTime(t *testing.T) {
r, vfs, file, file1, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
if !canSetModTime(t, r) {
t.Skip("can't set mod time")
}
err := file.SetModTime(t2)
require.NoError(t, err)
file1.ModTime = t2
fstest.CheckItems(t, r.Fremote, file1)
vfs.Opt.ReadOnly = true
err = file.SetModTime(t2)
assert.Equal(t, EROFS, err)
}
func fileCheckContents(t *testing.T, file *File) {
fd, err := file.Open(os.O_RDONLY)
require.NoError(t, err)
contents, err := ioutil.ReadAll(fd)
require.NoError(t, err)
assert.Equal(t, "file1 contents", string(contents))
require.NoError(t, fd.Close())
}
func TestFileOpenRead(t *testing.T) {
_, _, file, _, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
fileCheckContents(t, file)
}
func TestFileOpenReadUnknownSize(t *testing.T) {
var (
contents = []byte("file contents")
remote = "file.txt"
ctx = context.Background()
)
// create a mock object which returns size -1
o := mockobject.New(remote).WithContent(contents, mockobject.SeekModeNone)
o.SetUnknownSize(true)
assert.Equal(t, int64(-1), o.Size())
// add it to a mock fs
f := mockfs.NewFs("test", "root")
f.AddObject(o)
testObj, err := f.NewObject(ctx, remote)
require.NoError(t, err)
assert.Equal(t, int64(-1), testObj.Size())
// create a VFS from that mockfs
vfs := New(f, nil)
defer cleanupVFS(t, vfs)
// find the file
node, err := vfs.Stat(remote)
require.NoError(t, err)
require.True(t, node.IsFile())
file := node.(*File)
// open it
fd, err := file.openRead()
require.NoError(t, err)
assert.Equal(t, int64(0), fd.Size())
// check the contents are not empty even though size is empty
gotContents, err := ioutil.ReadAll(fd)
require.NoError(t, err)
assert.Equal(t, contents, gotContents)
t.Logf("gotContents = %q", gotContents)
// check that file size has been updated
assert.Equal(t, int64(len(contents)), fd.Size())
require.NoError(t, fd.Close())
}
func TestFileOpenWrite(t *testing.T) {
_, vfs, file, _, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
fd, err := file.openWrite(os.O_WRONLY | os.O_TRUNC)
require.NoError(t, err)
newContents := []byte("this is some new contents")
n, err := fd.Write(newContents)
require.NoError(t, err)
assert.Equal(t, len(newContents), n)
require.NoError(t, fd.Close())
assert.Equal(t, int64(25), file.Size())
vfs.Opt.ReadOnly = true
_, err = file.openWrite(os.O_WRONLY | os.O_TRUNC)
assert.Equal(t, EROFS, err)
}
func TestFileRemove(t *testing.T) {
r, vfs, file, _, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
err := file.Remove()
require.NoError(t, err)
fstest.CheckItems(t, r.Fremote)
vfs.Opt.ReadOnly = true
err = file.Remove()
assert.Equal(t, EROFS, err)
}
func TestFileRemoveAll(t *testing.T) {
r, vfs, file, _, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
err := file.RemoveAll()
require.NoError(t, err)
fstest.CheckItems(t, r.Fremote)
vfs.Opt.ReadOnly = true
err = file.RemoveAll()
assert.Equal(t, EROFS, err)
}
func TestFileOpen(t *testing.T) {
_, _, file, _, cleanup := fileCreate(t, vfscommon.CacheModeOff)
defer cleanup()
fd, err := file.Open(os.O_RDONLY)
require.NoError(t, err)
_, ok := fd.(*ReadFileHandle)
assert.True(t, ok)
require.NoError(t, fd.Close())
fd, err = file.Open(os.O_WRONLY)
assert.NoError(t, err)
_, ok = fd.(*WriteFileHandle)
assert.True(t, ok)
require.NoError(t, fd.Close())
fd, err = file.Open(os.O_RDWR)
assert.NoError(t, err)
_, ok = fd.(*WriteFileHandle)
assert.True(t, ok)
require.NoError(t, fd.Close())
_, err = file.Open(3)
assert.Equal(t, EPERM, err)
}
func testFileRename(t *testing.T, mode vfscommon.CacheMode, inCache bool, forceCache bool) {
r, vfs, file, item, cleanup := fileCreate(t, mode)
defer cleanup()
if !operations.CanServerSideMove(r.Fremote) {
t.Skip("skip as can't rename files")
}
rootDir, err := vfs.Root()
require.NoError(t, err)
// force the file into the cache if required
if forceCache {
// write the file with read and write
fd, err := file.Open(os.O_RDWR | os.O_CREATE | os.O_TRUNC)
require.NoError(t, err)
n, err := fd.Write([]byte("file1 contents"))
require.NoError(t, err)
require.Equal(t, 14, n)
err = fd.Close()
require.NoError(t, err)
}
// check file in cache
if inCache {
// read contents to get file in cache
fileCheckContents(t, file)
assert.True(t, vfs.cache.Exists(item.Path))
}
dir := file.Dir()
// start with "dir/file1"
fstest.CheckItems(t, r.Fremote, item)
// rename file to "newLeaf"
err = dir.Rename("file1", "newLeaf", rootDir)
require.NoError(t, err)
item.Path = "newLeaf"
fstest.CheckItems(t, r.Fremote, item)
// check file in cache
if inCache {
assert.True(t, vfs.cache.Exists(item.Path))
}
// check file exists in the vfs layer at its new name
_, err = vfs.Stat("newLeaf")
require.NoError(t, err)
// rename it back to "dir/file1"
err = rootDir.Rename("newLeaf", "file1", dir)
require.NoError(t, err)
item.Path = "dir/file1"
fstest.CheckItems(t, r.Fremote, item)
// check file in cache
if inCache {
assert.True(t, vfs.cache.Exists(item.Path))
}
// now try renaming it with the file open
// first open it and write to it but don't close it
fd, err := file.Open(os.O_WRONLY | os.O_TRUNC)
require.NoError(t, err)
newContents := []byte("this is some new contents")
_, err = fd.Write(newContents)
require.NoError(t, err)
// rename file to "newLeaf"
err = dir.Rename("file1", "newLeaf", rootDir)
require.NoError(t, err)
newItem := fstest.NewItem("newLeaf", string(newContents), item.ModTime)
// check file has been renamed immediately in the cache
if inCache {
assert.True(t, vfs.cache.Exists("newLeaf"))
}
// check file exists in the vfs layer at its new name
_, err = vfs.Stat("newLeaf")
require.NoError(t, err)
// Close the file
require.NoError(t, fd.Close())
// Check file has now been renamed on the remote
item.Path = "newLeaf"
vfs.WaitForWriters(waitForWritersDelay)
fstest.CheckListingWithPrecision(t, r.Fremote, []fstest.Item{newItem}, nil, fs.ModTimeNotSupported)
}
func TestFileRename(t *testing.T) {
for _, test := range []struct {
mode vfscommon.CacheMode
inCache bool
forceCache bool
}{
{mode: vfscommon.CacheModeOff, inCache: false},
{mode: vfscommon.CacheModeMinimal, inCache: false},
{mode: vfscommon.CacheModeMinimal, inCache: true, forceCache: true},
{mode: vfscommon.CacheModeWrites, inCache: false},
{mode: vfscommon.CacheModeWrites, inCache: true, forceCache: true},
{mode: vfscommon.CacheModeFull, inCache: true},
} {
t.Run(fmt.Sprintf("%v,forceCache=%v", test.mode, test.forceCache), func(t *testing.T) {
testFileRename(t, test.mode, test.inCache, test.forceCache)
})
}
}